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学科主题: 物理化学
题名: Surface Photocatalysis-TPD Spectrometer for Photochemical Kinetics
作者: Ren, Ze-feng1;  Guo, Qing1;  Xu, Chen-biao1, 2;  Yang, Wen-shao1;  Xiao, Chun-lei1;  Dai, Dong-xu1;  Yang, Xue-ming1
通讯作者: 杨学明
关键词: Temperature programmed desorption ;  Time of flight spectrum ;  Surface photochemical kinetics
刊名: CHINESE JOURNAL OF CHEMICAL PHYSICS
发表日期: 2012-10-01
DOI: 10.1088/1674-0068/25/05/507-512
卷: 25, 期:5, 页:507-512
收录类别: SCI
文章类型: Article
部门归属: 11
项目归属: 1102
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Physics
英文摘要: A surface photocatalysis-TPD apparatus devoted to studying kinetics and mechanism of photocatalytic processes with various signal crystal surfaces has been constructed. Extremely high vacuum (similar to 0.2 nPa) in the ionization region is obtained by using multiple ultrahigh vacuum pumps. Compared with similar instruments built previously by others, the H-2, CH4 background in the ionization region can be reduced by about two orders of magnitude, and other residual gases in the ionization region can be reduced by about an order of magnitude. Therefore, the signal-to-noise ratio for the temperature programmed desorption (TPD) and time of flight (TOF) spectra is substantially enhanced, making experimental studies of photocatalytic processes on surfaces much easier. In this work, we describe the new apparatus in detail and present some preliminary studies on the photo-induced oxygen vacancy defects on TiO2(110) at 266 nm by using the TPD and TOF methods. Preliminary results suggest that the apparatus is a powerful tool for studying kinetics and mechanism of photochemical processes.
关键词[WOS]: ULTRAHIGH-VACUUM ;  DESORPTION ;  WATER ;  ADSORPTION ;  TIO2(110) ;  AG(111) ;  DISSOCIATION ;  CHEMISTRY ;  HYDROGEN ;  METHANOL
语种: 英语
WOS记录号: WOS:000311582400001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/117948
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Sch Phys & Optoelect Technol, Dalian 116024, Peoples R China

Recommended Citation:
Ren, Ze-feng,Guo, Qing,Xu, Chen-biao,et al. Surface Photocatalysis-TPD Spectrometer for Photochemical Kinetics[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2012,25(5):507-512.
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