Experience

Publications

• Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene)

  Polymer Preprints, v.51, 2010, p. 650.

  Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene), Polystyrene Including Single Walled Carbon Nanotubes for Studying Materialcell Interactions and Gold Nanoparticles/synthetic Functional Polymer Nanofibers for B,"

• Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene)

  Polymer Preprints, v.51, 2010, p. 650.

  Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene), Polystyrene Including Single Walled Carbon Nanotubes for Studying Materialcell Interactions and Gold Nanoparticles/synthetic Functional Polymer Nanofibers for B,"

• Absorbed Molecular Oxygen and the Surface Behavior of Soot

  Symposia Preprints, Div. Fuel. Chem., Am. Chem. Soc

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene)

  Polymer Preprints, v.51, 2010, p. 650.

  Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene), Polystyrene Including Single Walled Carbon Nanotubes for Studying Materialcell Interactions and Gold Nanoparticles/synthetic Functional Polymer Nanofibers for B,"

• Absorbed Molecular Oxygen and the Surface Behavior of Soot

  Symposia Preprints, Div. Fuel. Chem., Am. Chem. Soc

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Adsorption and adsorbate interaction at soot particle surfaces

  Carbon

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene)

  Polymer Preprints, v.51, 2010, p. 650.

  Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene), Polystyrene Including Single Walled Carbon Nanotubes for Studying Materialcell Interactions and Gold Nanoparticles/synthetic Functional Polymer Nanofibers for B,"

• Absorbed Molecular Oxygen and the Surface Behavior of Soot

  Symposia Preprints, Div. Fuel. Chem., Am. Chem. Soc

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Adsorption and adsorbate interaction at soot particle surfaces

  Carbon

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Virtual Text Book for Survey of Chemistry 1 (GOB Students)

  Maher Atteya, Jerry Poteat and Antara Dutta

  Survey of Chemistry eTextbook (An Online Textbook for GOB Course): The link of this virtual textbook is given at: https://chemistrylearningbydoing.org This virtual text book is very unique as it uses lots of videos and simulation found in the open education resources in the web.

• Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene)

  Polymer Preprints, v.51, 2010, p. 650.

  Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene), Polystyrene Including Single Walled Carbon Nanotubes for Studying Materialcell Interactions and Gold Nanoparticles/synthetic Functional Polymer Nanofibers for B,"

• Absorbed Molecular Oxygen and the Surface Behavior of Soot

  Symposia Preprints, Div. Fuel. Chem., Am. Chem. Soc

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Adsorption and adsorbate interaction at soot particle surfaces

  Carbon

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Virtual Text Book for Survey of Chemistry 1 (GOB Students)

  Maher Atteya, Jerry Poteat and Antara Dutta

  Survey of Chemistry eTextbook (An Online Textbook for GOB Course): The link of this virtual textbook is given at: https://chemistrylearningbydoing.org This virtual text book is very unique as it uses lots of videos and simulation found in the open education resources in the web.

• Interaction of SOx and NOx with Soot

  Symposia Preprints, Div. Fuel. Chem,. Am. Chem. Soc.,

  "Current research is related to the interaction of gas phase molecules with solid surfaces, and now is mostly focused on the nature and reactivity of black carbon (soot), produced through the combustion of fossil fuels. Previous work provided a characterization of the soot structure and surface which has been useful in studying its reactions, including their kinetics and mechanisms, with gaseous species of atmospheric interest. Recent research has emphasized the heterogeneous reactions of soot with oxides of nitrogen and sulfur, and ozone, studied through spectroscopic and microgravimetric techniques. Other questions being addressed by kinetics studies include catalysis, hydration mechanisms, the behavior of multiple reactants, and photochemical effects. Also under study is the role of the solid (soot) phase in these reactions, including unpaired electrons (by EPR), trace metals/mineral content, and particle size and morphology"

• Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene)

  Polymer Preprints, v.51, 2010, p. 650.

  Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene), Polystyrene Including Single Walled Carbon Nanotubes for Studying Materialcell Interactions and Gold Nanoparticles/synthetic Functional Polymer Nanofibers for B,"

• Absorbed Molecular Oxygen and the Surface Behavior of Soot

  Symposia Preprints, Div. Fuel. Chem., Am. Chem. Soc

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Adsorption and adsorbate interaction at soot particle surfaces

  Carbon

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Virtual Text Book for Survey of Chemistry 1 (GOB Students)

  Maher Atteya, Jerry Poteat and Antara Dutta

  Survey of Chemistry eTextbook (An Online Textbook for GOB Course): The link of this virtual textbook is given at: https://chemistrylearningbydoing.org This virtual text book is very unique as it uses lots of videos and simulation found in the open education resources in the web.

• Interaction of SOx and NOx with Soot

  Symposia Preprints, Div. Fuel. Chem,. Am. Chem. Soc.,

  "Current research is related to the interaction of gas phase molecules with solid surfaces, and now is mostly focused on the nature and reactivity of black carbon (soot), produced through the combustion of fossil fuels. Previous work provided a characterization of the soot structure and surface which has been useful in studying its reactions, including their kinetics and mechanisms, with gaseous species of atmospheric interest. Recent research has emphasized the heterogeneous reactions of soot with oxides of nitrogen and sulfur, and ozone, studied through spectroscopic and microgravimetric techniques. Other questions being addressed by kinetics studies include catalysis, hydration mechanisms, the behavior of multiple reactants, and photochemical effects. Also under study is the role of the solid (soot) phase in these reactions, including unpaired electrons (by EPR), trace metals/mineral content, and particle size and morphology"

• Carbonaceous particle hydration II

  Journal: Atmospheric Environment

  Microgravimetric measurements of the hydration of several different black carbons or soots and a series of commercial carbon blacks have been carried out, over a relative humidity range of 20–85%, in an extension of earlier work with the model n-hexane soot. All adsorption isotherms are of type III and were analyzed by the use of the Dubinin–Radushkevich (DR) equation which, although applicable over a limited range of intermediate relative humidity values, allows identification of chemisorption limit and onset of multilayer formation. While surface area determines the maximum adsorption possible for a given type, surface functionalities are determinative at lower humidity and are characteristic of the soot-producing fuel. Aging of carbon particles and oxygen chemisorption as well as O2 physisorption strongly influence the extent of hydration for those soots studied, such as JP-8 aviation and diesel fuels. Infrared spectra confirm the surface oxidation of JP-8 soot by its reaction with O3, a reaction of probable atmospheric importance, as underlying its increased hydration.less

• Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene)

  Polymer Preprints, v.51, 2010, p. 650.

  Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene), Polystyrene Including Single Walled Carbon Nanotubes for Studying Materialcell Interactions and Gold Nanoparticles/synthetic Functional Polymer Nanofibers for B,"

• Absorbed Molecular Oxygen and the Surface Behavior of Soot

  Symposia Preprints, Div. Fuel. Chem., Am. Chem. Soc

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Adsorption and adsorbate interaction at soot particle surfaces

  Carbon

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Virtual Text Book for Survey of Chemistry 1 (GOB Students)

  Maher Atteya, Jerry Poteat and Antara Dutta

  Survey of Chemistry eTextbook (An Online Textbook for GOB Course): The link of this virtual textbook is given at: https://chemistrylearningbydoing.org This virtual text book is very unique as it uses lots of videos and simulation found in the open education resources in the web.

• Interaction of SOx and NOx with Soot

  Symposia Preprints, Div. Fuel. Chem,. Am. Chem. Soc.,

  "Current research is related to the interaction of gas phase molecules with solid surfaces, and now is mostly focused on the nature and reactivity of black carbon (soot), produced through the combustion of fossil fuels. Previous work provided a characterization of the soot structure and surface which has been useful in studying its reactions, including their kinetics and mechanisms, with gaseous species of atmospheric interest. Recent research has emphasized the heterogeneous reactions of soot with oxides of nitrogen and sulfur, and ozone, studied through spectroscopic and microgravimetric techniques. Other questions being addressed by kinetics studies include catalysis, hydration mechanisms, the behavior of multiple reactants, and photochemical effects. Also under study is the role of the solid (soot) phase in these reactions, including unpaired electrons (by EPR), trace metals/mineral content, and particle size and morphology"

• Carbonaceous particle hydration II

  Journal: Atmospheric Environment

  Microgravimetric measurements of the hydration of several different black carbons or soots and a series of commercial carbon blacks have been carried out, over a relative humidity range of 20–85%, in an extension of earlier work with the model n-hexane soot. All adsorption isotherms are of type III and were analyzed by the use of the Dubinin–Radushkevich (DR) equation which, although applicable over a limited range of intermediate relative humidity values, allows identification of chemisorption limit and onset of multilayer formation. While surface area determines the maximum adsorption possible for a given type, surface functionalities are determinative at lower humidity and are characteristic of the soot-producing fuel. Aging of carbon particles and oxygen chemisorption as well as O2 physisorption strongly influence the extent of hydration for those soots studied, such as JP-8 aviation and diesel fuels. Infrared spectra confirm the surface oxidation of JP-8 soot by its reaction with O3, a reaction of probable atmospheric importance, as underlying its increased hydration.less

• Adsorption and Decomposition of Organophosphorus Compounds on Nanoscale Metal Oxide Particles: In Situ GCMS of Pulsed Microreactions over Magnesium Oxide

  Chem. of Materials

  Using an in-situ pulsed reactor GC-MS system, the thermal decomposition of organophosphorus compounds (as models of nerve agents) has been compared with their destructive adsorption on high surface area magnesium oxide. Dramatically lower temperatures are required when MgO is present. Volatile products evolved were formic acid, water, alcohols, and alkenes. At higher temperatures CO, CH4, and water predominated. Phosphorus residues remained completely immobilized. Addition of water enhanced the facility of MgO to destroy these compounds, and in fact, water pulses were found to partially regenerate a spent MgO bed. Using 110 labeling, some aspects of the reaction mechanisms were clarified and in particular showed that oxygen scrambling occurred. Surface OH and MgO groups transferred oxygen in the formation of formic acid, and surface mobility and reactivity of adsorbed groups was very high. The substantial capacity of high surface area MgO for destruction and immobilization of such toxic substances makes it attractive for air purification schemes as well as solid reagents for destruction and immobilization of bulk quantities of hazardous phosphorus compounds or organohalides. Fourier Transform Infrared Photoacoustic Spectroscopy Study

• Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene)

  Polymer Preprints, v.51, 2010, p. 650.

  Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene), Polystyrene Including Single Walled Carbon Nanotubes for Studying Materialcell Interactions and Gold Nanoparticles/synthetic Functional Polymer Nanofibers for B,"

• Absorbed Molecular Oxygen and the Surface Behavior of Soot

  Symposia Preprints, Div. Fuel. Chem., Am. Chem. Soc

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Adsorption and adsorbate interaction at soot particle surfaces

  Carbon

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Virtual Text Book for Survey of Chemistry 1 (GOB Students)

  Maher Atteya, Jerry Poteat and Antara Dutta

  Survey of Chemistry eTextbook (An Online Textbook for GOB Course): The link of this virtual textbook is given at: https://chemistrylearningbydoing.org This virtual text book is very unique as it uses lots of videos and simulation found in the open education resources in the web.

• Interaction of SOx and NOx with Soot

  Symposia Preprints, Div. Fuel. Chem,. Am. Chem. Soc.,

  "Current research is related to the interaction of gas phase molecules with solid surfaces, and now is mostly focused on the nature and reactivity of black carbon (soot), produced through the combustion of fossil fuels. Previous work provided a characterization of the soot structure and surface which has been useful in studying its reactions, including their kinetics and mechanisms, with gaseous species of atmospheric interest. Recent research has emphasized the heterogeneous reactions of soot with oxides of nitrogen and sulfur, and ozone, studied through spectroscopic and microgravimetric techniques. Other questions being addressed by kinetics studies include catalysis, hydration mechanisms, the behavior of multiple reactants, and photochemical effects. Also under study is the role of the solid (soot) phase in these reactions, including unpaired electrons (by EPR), trace metals/mineral content, and particle size and morphology"

• Carbonaceous particle hydration II

  Journal: Atmospheric Environment

  Microgravimetric measurements of the hydration of several different black carbons or soots and a series of commercial carbon blacks have been carried out, over a relative humidity range of 20–85%, in an extension of earlier work with the model n-hexane soot. All adsorption isotherms are of type III and were analyzed by the use of the Dubinin–Radushkevich (DR) equation which, although applicable over a limited range of intermediate relative humidity values, allows identification of chemisorption limit and onset of multilayer formation. While surface area determines the maximum adsorption possible for a given type, surface functionalities are determinative at lower humidity and are characteristic of the soot-producing fuel. Aging of carbon particles and oxygen chemisorption as well as O2 physisorption strongly influence the extent of hydration for those soots studied, such as JP-8 aviation and diesel fuels. Infrared spectra confirm the surface oxidation of JP-8 soot by its reaction with O3, a reaction of probable atmospheric importance, as underlying its increased hydration.less

• Adsorption and Decomposition of Organophosphorus Compounds on Nanoscale Metal Oxide Particles: In Situ GCMS of Pulsed Microreactions over Magnesium Oxide

  Chem. of Materials

  Using an in-situ pulsed reactor GC-MS system, the thermal decomposition of organophosphorus compounds (as models of nerve agents) has been compared with their destructive adsorption on high surface area magnesium oxide. Dramatically lower temperatures are required when MgO is present. Volatile products evolved were formic acid, water, alcohols, and alkenes. At higher temperatures CO, CH4, and water predominated. Phosphorus residues remained completely immobilized. Addition of water enhanced the facility of MgO to destroy these compounds, and in fact, water pulses were found to partially regenerate a spent MgO bed. Using 110 labeling, some aspects of the reaction mechanisms were clarified and in particular showed that oxygen scrambling occurred. Surface OH and MgO groups transferred oxygen in the formation of formic acid, and surface mobility and reactivity of adsorbed groups was very high. The substantial capacity of high surface area MgO for destruction and immobilization of such toxic substances makes it attractive for air purification schemes as well as solid reagents for destruction and immobilization of bulk quantities of hazardous phosphorus compounds or organohalides. Fourier Transform Infrared Photoacoustic Spectroscopy Study

• Carbonaceous particle hydration

  Journal: Atmospheric Environment

  Microgravimetric measurements of the hydration of several different black carbons or soots and a series of commercial carbon blacks have been carried out, over a relative humidity range of 20–85%, in an extension of earlier work with the model n-hexane soot. All adsorption isotherms are of type III and were analyzed by the use of the Dubinin–Radushkevich (DR) equation which, although applicable over a limited range of intermediate relative humidity values, allows identification of chemisorption limit and onset of multilayer formation. While surface area determines the maximum adsorption possible for a given type, surface functionalities are determinative at lower humidity and are characteristic of the soot-producing fuel. Aging of carbon particles and oxygen chemisorption as well as O2 physisorption strongly influence the extent of hydration for those soots studied, such as JP-8 aviation and diesel fuels. Infrared spectra confirm the surface oxidation of JP-8 soot by its reaction with O3, a reaction of probable atmospheric importance, as underlying its increased hydration.

• Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene)

  Polymer Preprints, v.51, 2010, p. 650.

  Fabrication of Functional Conductive Nanofibers Compose of A,_-bi-DNP-poly(2- methoxystyrene), Polystyrene Including Single Walled Carbon Nanotubes for Studying Materialcell Interactions and Gold Nanoparticles/synthetic Functional Polymer Nanofibers for B,"

• Absorbed Molecular Oxygen and the Surface Behavior of Soot

  Symposia Preprints, Div. Fuel. Chem., Am. Chem. Soc

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Adsorption and adsorbate interaction at soot particle surfaces

  Carbon

  Previously reported research, demonstrating a role of adsorbed molecular oxygen in the reaction of ozone with soot particles and in their hydration, has been extended to explore the interaction between O2 and SO2, O3, H2O, NH3, NO2 and NO at the soot surface as well as the effect of these adsorbates on each other. Electron paramagnetic resonance (EPR) and microgravimetry have revealed the extent of interactions between some competing reactants on soot. EPR has been used as a probe of the surface behavior of paramagnetic species (O2, NO2, NO) through their effect on the intensity of a large signal which is the result of the high concentration of unpaired electrons in soots. The effects of diamagnetic reactants (H2O, NH3, SO2) also are measured through their influence on the paramagnetic adsorbates and thus on the EPR signal. Microgravimetric measurements of adsorption and changes in the mass resulting from surface reactions also have enabled interpretations of the behavior of reactants on soot particles. Details of the modes of adsorption of SO2, NO2 and NH3 on n-hexane soot have emerged from these measurements as well.

• Virtual Text Book for Survey of Chemistry 1 (GOB Students)

  Maher Atteya, Jerry Poteat and Antara Dutta

  Survey of Chemistry eTextbook (An Online Textbook for GOB Course): The link of this virtual textbook is given at: https://chemistrylearningbydoing.org This virtual text book is very unique as it uses lots of videos and simulation found in the open education resources in the web.

• Interaction of SOx and NOx with Soot

  Symposia Preprints, Div. Fuel. Chem,. Am. Chem. Soc.,

  "Current research is related to the interaction of gas phase molecules with solid surfaces, and now is mostly focused on the nature and reactivity of black carbon (soot), produced through the combustion of fossil fuels. Previous work provided a characterization of the soot structure and surface which has been useful in studying its reactions, including their kinetics and mechanisms, with gaseous species of atmospheric interest. Recent research has emphasized the heterogeneous reactions of soot with oxides of nitrogen and sulfur, and ozone, studied through spectroscopic and microgravimetric techniques. Other questions being addressed by kinetics studies include catalysis, hydration mechanisms, the behavior of multiple reactants, and photochemical effects. Also under study is the role of the solid (soot) phase in these reactions, including unpaired electrons (by EPR), trace metals/mineral content, and particle size and morphology"

• Carbonaceous particle hydration II

  Journal: Atmospheric Environment

  Microgravimetric measurements of the hydration of several different black carbons or soots and a series of commercial carbon blacks have been carried out, over a relative humidity range of 20–85%, in an extension of earlier work with the model n-hexane soot. All adsorption isotherms are of type III and were analyzed by the use of the Dubinin–Radushkevich (DR) equation which, although applicable over a limited range of intermediate relative humidity values, allows identification of chemisorption limit and onset of multilayer formation. While surface area determines the maximum adsorption possible for a given type, surface functionalities are determinative at lower humidity and are characteristic of the soot-producing fuel. Aging of carbon particles and oxygen chemisorption as well as O2 physisorption strongly influence the extent of hydration for those soots studied, such as JP-8 aviation and diesel fuels. Infrared spectra confirm the surface oxidation of JP-8 soot by its reaction with O3, a reaction of probable atmospheric importance, as underlying its increased hydration.less

• Adsorption and Decomposition of Organophosphorus Compounds on Nanoscale Metal Oxide Particles: In Situ GCMS of Pulsed Microreactions over Magnesium Oxide

  Chem. of Materials

  Using an in-situ pulsed reactor GC-MS system, the thermal decomposition of organophosphorus compounds (as models of nerve agents) has been compared with their destructive adsorption on high surface area magnesium oxide. Dramatically lower temperatures are required when MgO is present. Volatile products evolved were formic acid, water, alcohols, and alkenes. At higher temperatures CO, CH4, and water predominated. Phosphorus residues remained completely immobilized. Addition of water enhanced the facility of MgO to destroy these compounds, and in fact, water pulses were found to partially regenerate a spent MgO bed. Using 110 labeling, some aspects of the reaction mechanisms were clarified and in particular showed that oxygen scrambling occurred. Surface OH and MgO groups transferred oxygen in the formation of formic acid, and surface mobility and reactivity of adsorbed groups was very high. The substantial capacity of high surface area MgO for destruction and immobilization of such toxic substances makes it attractive for air purification schemes as well as solid reagents for destruction and immobilization of bulk quantities of hazardous phosphorus compounds or organohalides. Fourier Transform Infrared Photoacoustic Spectroscopy Study

• Carbonaceous particle hydration

  Journal: Atmospheric Environment

  Microgravimetric measurements of the hydration of several different black carbons or soots and a series of commercial carbon blacks have been carried out, over a relative humidity range of 20–85%, in an extension of earlier work with the model n-hexane soot. All adsorption isotherms are of type III and were analyzed by the use of the Dubinin–Radushkevich (DR) equation which, although applicable over a limited range of intermediate relative humidity values, allows identification of chemisorption limit and onset of multilayer formation. While surface area determines the maximum adsorption possible for a given type, surface functionalities are determinative at lower humidity and are characteristic of the soot-producing fuel. Aging of carbon particles and oxygen chemisorption as well as O2 physisorption strongly influence the extent of hydration for those soots studied, such as JP-8 aviation and diesel fuels. Infrared spectra confirm the surface oxidation of JP-8 soot by its reaction with O3, a reaction of probable atmospheric importance, as underlying its increased hydration.

• Metal Oxide Particles as Chemical Reagents: Heat of Adsorption of Heteroatom – Containing Organic on Heat – Treated Magnesium Oxide Samples of Varying Surface Areas,

  Chem. Materials

  Heats of adsorption (immersion) were measured via a solution calorimeter for a series of heteroatom (oxygen, sulfur, phosphorus) containing organic compounds on thermally activated magnesium oxide (heat treated at 7000C overnight in vacuo followed by cooling to room temperature). For phosphates, phosphites, and phosphines the heats of adsorption were high and showed a small dependence on substituent effects. For sulfur compounds, -S-H-containing compounds yielded the highest values. For oxygen systems very high heats of adsorption were found for carbonyl compounds. In addition, the strongly basic nature of the MgO surface was demonstrated by the extremely high heats of adsorption/reaction with carboxylic acids. Heats observed for 1-butanol adsorption varied linearly with MgO surface area. Surprisingly, cyclohexane dilution of 1-butanol caused a dramatic lowering of adsorption heats, demonstrating the competitive nature of even such unreactive solvents. The observed heats of adsorption/reaction combined with spectroscopic data allowed some conclusions about the type of surface bonding that took place. The strong interactions of several of these organics demonstrate the nature of heat-treated MgO as a destructive adsorbent for many toxic chemicals. Since MgO is nontoxic and inexpensive and can be prepared in highly surface activated forms, it shows promise for use in air-purification schemes.