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Excitation Wavelength Dependence of Photocatalyzed Oxidation of Methanol on TiO2(110)
Wang, Zhi-qiang; Hao, Qun-qing; Zhou, Chuan-yao; Dai, Dong-xu; Yang, Xue-ming
关键词Titanium Dioxide Photocatalysis Excitation Wavelength Dependence Temperature-programmed Desorption
刊名CHINESE JOURNAL OF CHEMICAL PHYSICS
2015-08-01
DOI10.1063/1674-0068/28/cjcp1507147
28期:4页:459-464
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Physics, Atomic, Molecular & Chemical
研究领域[WOS]Physics
关键词[WOS]MOLECULAR-HYDROGEN FORMATION ; FRACTAL REACTION-KINETICS ; TITANIUM-DIOXIDE ; SURFACE SCIENCE ; PHOTON ENERGY ; TIO2 PHOTOCATALYSIS ; METHYL FORMATE ; ADSORPTION ; WATER ; DISSOCIATION
英文摘要Post-irradiation temperature-programmed desorption (TPD) has been used to study the photo catalyzed oxidation of methanol on TiO2(110) surface under the irradiation of 360, 380 and 400 nm light. The photocatalytic process initiated by ultraviolet light of different wavelength are similar. Methanol has been photocatalytically converted into formaldehyde, and the released hydrogen atoms transfer to the neighboring twofold coordinated oxygen to form bridging hydroxyls. The reaction rate, however, is strongly wavelength dependent. The reaction rate under 360 nm light irradiation is 4.8 times of that in the case of 400 nm exposure, consistent with a previous femtosecond time-resolved absorption measurement on TiO2 which shows the faster charge carrier recombination in the near-band-gap than the over-band-gap excitation. So far, the underlying factors which govern the excitation wavelength dependence of photocatalytic activity of TiO2 and other photocatalysts remain unclear, and future studies are needed to address this important issue.
语种英语
WOS记录号WOS:000361418000013
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/146548
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
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Wang, Zhi-qiang,Hao, Qun-qing,Zhou, Chuan-yao,et al. Excitation Wavelength Dependence of Photocatalyzed Oxidation of Methanol on TiO2(110)[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2015,28(4):459-464.
APA Wang, Zhi-qiang,Hao, Qun-qing,Zhou, Chuan-yao,Dai, Dong-xu,&Yang, Xue-ming.(2015).Excitation Wavelength Dependence of Photocatalyzed Oxidation of Methanol on TiO2(110).CHINESE JOURNAL OF CHEMICAL PHYSICS,28(4),459-464.
MLA Wang, Zhi-qiang,et al."Excitation Wavelength Dependence of Photocatalyzed Oxidation of Methanol on TiO2(110)".CHINESE JOURNAL OF CHEMICAL PHYSICS 28.4(2015):459-464.
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