Fabrication of WO3/TiO2 Heterostructures for Efficiently Photocatalytic Gaseous Hydrocarbons Degradation: Origin of Photoactivity and Revisit the Role of WO3 Decoration
王丹;潘晓阳;王广涛;易志国
a (CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China)
b (College of Physics and Materials Science, Henan Normal University, Xinxiang, Henan 453007, China)
Fabrication of WO3/TiO2 Heterostructures for Efficiently Photocatalytic Gaseous Hydrocarbons Degradation: Origin of Photoactivity and Revisit the Role of WO3 Decoration
WANG Dan;PAN Xiao-Yang;WANG Guang-Tao;YI Zhi-Guo
a (CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China)
b (College of Physics and Materials Science, Henan Normal University, Xinxiang, Henan 453007, China)
Efficient oxidation of gaseous small molecular hydrocarbons under mild conditions remains a significant but challenging task to date. Here we report that WO3 decoration can obviously improve the performance of TiO2 (P25) toward the photocatalytic oxidation of several small molecular hydrocarbons (C2H6, C3H8 and C2H4) under simulated solar light irradiation. Among the WO3/TiO2 heterostructures, the 10wt%WO3/TiO2 nanocomposite shows the best photoactivities, which can efficiently oxidize C2H6, C3H8 and C2H4 within 15, 9 and 8 minutes, respectively under simulated sunlight with a light intensity of 200 mW/cm2. By strong contrast, a decreased photoactivity of TiO2 by coupling with WO3 is observed when investigating the performance of photocatalysts toward the degradation of methylene blue (MB) in liquid phase. The opposing effect of WO3 decoration on the performance of TiO2 is thoroughly investigated, and it is found that the improved photoactivities for gaseous hydrocarbon degradation is ascribed to the enhanced oxygen adsorption, resulting from WO3 decoration rather than efficient charge separation within the WO3/TiO2 heterostructures.
Efficient oxidation of gaseous small molecular hydrocarbons under mild conditions remains a significant but challenging task to date. Here we report that WO3 decoration can obviously improve the performance of TiO2 (P25) toward the photocatalytic oxidation of several small molecular hydrocarbons (C2H6, C3H8 and C2H4) under simulated solar light irradiation. Among the WO3/TiO2 heterostructures, the 10wt%WO3/TiO2 nanocomposite shows the best photoactivities, which can efficiently oxidize C2H6, C3H8 and C2H4 within 15, 9 and 8 minutes, respectively under simulated sunlight with a light intensity of 200 mW/cm2. By strong contrast, a decreased photoactivity of TiO2 by coupling with WO3 is observed when investigating the performance of photocatalysts toward the degradation of methylene blue (MB) in liquid phase. The opposing effect of WO3 decoration on the performance of TiO2 is thoroughly investigated, and it is found that the improved photoactivities for gaseous hydrocarbon degradation is ascribed to the enhanced oxygen adsorption, resulting from WO3 decoration rather than efficient charge separation within the WO3/TiO2 heterostructures.
Supported by the National Key Project on Basic Research (No. 2013CB933203), the Strategic Priority Research Program of the Chinese Academy
of Sciences (No. XDB20000000), the National Natural Science Foundation of China (No. 21607153, 21373224 and 21577143), the Natural Science Foundation of Fujian Province (No. 2015J05044), and the Frontier Science Key Project of the Chinese Academy of Sciences (QYZDB-SSW-JSC027)
王丹;潘晓阳;王广涛;易志国. Fabrication of WO3/TiO2 Heterostructures for Efficiently Photocatalytic Gaseous Hydrocarbons Degradation: Origin of Photoactivity and Revisit the Role of WO3 Decoration[J]. 结构化学, 2018, 37(2): 230-241.
WANG Dan;PAN Xiao-Yang;WANG Guang-Tao;YI Zhi-Guo. Fabrication of WO3/TiO2 Heterostructures for Efficiently Photocatalytic Gaseous Hydrocarbons Degradation: Origin of Photoactivity and Revisit the Role of WO3 Decoration. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 2018, 37(2): 230-241.
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2018, Vol. 37 
