Plasmonic Ag-TiO2-x nanocomposites for the photocatalytic removal of NO under visible light with high selectivity: The role of oxygen vacancies
Duan, YY (Duan, Yanyan); Zhang, M (Zhang, Mei); Wang, L (Wang, Lan); Wang, F (Wang, Fu); Yang, LP (Yang, Liping); Li, XY (Li, Xiyou); Wang, CY (Wang, Chuanyi)
2017
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
Volume204Issue:5Pages:67-77
AbstractIntegration of semiconductors with plasmonic noble metal nanoparticles for visible-light driven photo catalysis has become an interesting research field recently. In this work, Ag-TiO2-x nanocomposites were successfully synthesized via a facile photochemical reduction process followed by post-annealing. The deposition of Ag nanoparticles greatly increases the light absorption and charge separation. Compared with commercial P25, the Ag-TiO2-x nanocomposites are not only superior in visible-light photocatalytic NO removal, but also in inhibiting the production of NO2, whose toxicity is 4-5 times higher than NO. As confirmed by gas chromatography, the photo-oxidation of NO and selective photo-reduction of NO to N-2 occur simultaneously during the process of NO removal by Ag-TiO2-x. The oxidation of NO was due to the synergic effect between h(+) and O-center dot(2)-; while the selective photo-reduction was resulted from introduced oxygen vacancies in TiO2. In addition, the light wavelength dependence measurement reveals that the surface plasmon resonance effect of Ag is responsible for the improvement of the visible-light photoactivity. The present study will provide an alternative approach to design highly selective photocatalysts for NO removal under visible-light.
KeywordNo Removal Photoreduction Ag-tio2-x Surface Plasmon Resonance High Selectivity
DOI10.1016/j.apcatb.2016.11.023
Indexed BySCI
WOS IDWOS:000392681000008
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Cited Times:37[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/4853
Collection中国科学院特殊环境功能材料与器件重点试验室
Affiliation1.Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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GB/T 7714
Duan, YY ,Zhang, M ,Wang, L ,et al. Plasmonic Ag-TiO2-x nanocomposites for the photocatalytic removal of NO under visible light with high selectivity: The role of oxygen vacancies[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,204(5):67-77.
APA Duan, YY .,Zhang, M .,Wang, L .,Wang, F .,Yang, LP .,...&Wang, CY .(2017).Plasmonic Ag-TiO2-x nanocomposites for the photocatalytic removal of NO under visible light with high selectivity: The role of oxygen vacancies.APPLIED CATALYSIS B-ENVIRONMENTAL,204(5),67-77.
MLA Duan, YY ,et al."Plasmonic Ag-TiO2-x nanocomposites for the photocatalytic removal of NO under visible light with high selectivity: The role of oxygen vacancies".APPLIED CATALYSIS B-ENVIRONMENTAL 204.5(2017):67-77.
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