Ze-feng Ren, Qing Guo, Chen-biao Xu, Wen-shao Yang, Chun-lei Xiao, Dong-xu Dai, Xue-ming Yang. Surface Photocatalysis-TPD Spectrometer for Photochemical Kinetics[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 507-512. doi: 10.1088/1674-0068/25/05/507-512
Citation: Ze-feng Ren, Qing Guo, Chen-biao Xu, Wen-shao Yang, Chun-lei Xiao, Dong-xu Dai, Xue-ming Yang. Surface Photocatalysis-TPD Spectrometer for Photochemical Kinetics[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 507-512. doi: 10.1088/1674-0068/25/05/507-512

Surface Photocatalysis-TPD Spectrometer for Photochemical Kinetics

doi: 10.1088/1674-0068/25/05/507-512
Funds:  This work was supported by the National Natural Science Foundation of China, the Chinese Academy of Sciences, and the Ministry of Science and Technology.
  • Received Date: 2012-07-23
  • A surface photocatalysis-TPD apparatus devoted to studying kinetics and mechanism of pho-tocatalytic processes with various signal crystal surfaces has been constructed. Extremely high vacuum ( 0.2 nPa) in the ionization region is obtained by using multiple ultrahigh vacuum pumps. Compared with similar instruments built previously by others, the H2, 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 pho-tocatalytic 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.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Surface Photocatalysis-TPD Spectrometer for Photochemical Kinetics

doi: 10.1088/1674-0068/25/05/507-512
Funds:  This work was supported by the National Natural Science Foundation of China, the Chinese Academy of Sciences, and the Ministry of Science and Technology.

Abstract: A surface photocatalysis-TPD apparatus devoted to studying kinetics and mechanism of pho-tocatalytic processes with various signal crystal surfaces has been constructed. Extremely high vacuum ( 0.2 nPa) in the ionization region is obtained by using multiple ultrahigh vacuum pumps. Compared with similar instruments built previously by others, the H2, 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 pho-tocatalytic 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.

Ze-feng Ren, Qing Guo, Chen-biao Xu, Wen-shao Yang, Chun-lei Xiao, Dong-xu Dai, Xue-ming Yang. Surface Photocatalysis-TPD Spectrometer for Photochemical Kinetics[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 507-512. doi: 10.1088/1674-0068/25/05/507-512
Citation: Ze-feng Ren, Qing Guo, Chen-biao Xu, Wen-shao Yang, Chun-lei Xiao, Dong-xu Dai, Xue-ming Yang. Surface Photocatalysis-TPD Spectrometer for Photochemical Kinetics[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 507-512. doi: 10.1088/1674-0068/25/05/507-512

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