光催化分解水制氢.pptxVIP

光催化分解水制氢 ;2019年11月13日星期三;2019年11月13日星期三;氢的主要来源;纳米粒子光催化分解水的要求;Nanjing University of Aeronautics and Astronautics Institute of Nanoscience;最佳能隙范围;Intensity of sunlight versus wavelength for AM1.5 conditions.;Energy band positions for various semiconductors at pH 14, the reduction and oxidation potentials of water vary with -59 mV per pH unit. ;纳米材料;主要的优化方法;Nanjing University of Aeronautics and Astronautics Institute of Nanoscience;TiO2纳米粒子催化性能改进方法;Energy diagram of a PEC cell for the photo-electrolysis of water. The cell is based on an n-type semiconducting photo-anode.;Nanjing University of Aeronautics and Astronautics Institute of Nanoscience;Nano-sized TiO2 photocatalyst : opportunity challenge;;Main content;其;Mechanism of photocatalysis;Why TiO2?;Challenge of TiO2!!!;;V5+,Mn4+,Fe3+-doped TiO2;Mo6+-doped TiO2;;Ag-TiO2;Ru-TiO2;;F--doped TiO2;N3--doped TiO2; ;TiO2-WO3;TiO2-CdS;Other modification methods;Conclusion Outlook;Reference;Application of Zirconium Dioxide as a New Photocatalyst;Overview;Photocatalyst;Photosynthesis and Photocatalysis;How Does Photocatalyst Work?;Advantages of Using Photocatalyst;Application of Photocatalyst;Properties of ZrO2;Energy Band Gap of Materials;Band Gap and Charge Distribution of ZrO2 vs TiO2;Electron Trapping and Storage in ZrO2 Conduction Band;A New Photocatalyst Application of Zirconium Dioxide;Photocatalytic Water Splitting;Paper of interest;Carbon Dioxide (CO2) ;Why Worried About Excessive CO2 Emission?;Synthesis and Photochemistry of Zirconium Dioxide;Time Dependence Plot of Amount of CO Formation and H2 Consumption;Effect of Reaction Temperature on Photoreaction of CO2 + H2 ;Surface Intermediates ;What is the Role of Surface Formate?;Formation of CO2- Radicals;Summary of Reaction Mechanism for Photoreduction of CO2 by H2 over Irradiatied ZrO2;Summary of reaction mechanism for photoreduction of CO2 by methane over irradiated ZrO2;Conclusion;Semi-conductor materials are doped with impurities chosen to give the material spec