自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 17    No. 5    October 2010

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Light energy conversion device for photocatalyst 2.0%WO3-TiO2 with
oxygen vacancies for water splitting
TONG Hai-xia(童海霞)1, CHEN Qi-yuan(陈启元)2, HU Hui-ping(胡慧萍)2, YIN Zhou-lan(尹周澜)2

1. Institute of Chemical and Biologic Engineering, Changsha University of Science and Technology,
Changsha 410076, China;
2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

Abstract:Using carbon felt, polytetrafluoroethylene latex and powder catalyst to assembly a light energy conversion device, the photocatalytic activity of catalyst 2.0%WO3-TiO2 (2%WO3 compounding TiO2) with oxygen vacancies was studied through the water splitting for O2 evolution, using a high pressure mercury lamp as the light source and Fe3+ as the electron acceptor in two different devices: an ordinary photolysis device with catalyst powder suspending through a magnetic stirrer and a self-assembly light energy conversion device. The results show that after 12 h irradiation, the photocatalytic activity of 2.0%WO3-TiO2 with oxygen vacancies in the self-assembly light energy conversion device is higher than that of the ordinary photolysis device, and the amount of oxygen evolution is about 12 and 9 mmol/L respectively in these two devices. After 12 h, the rates of O2 evolution are slow in each device and the photocatalyst almost loses the photoactivity in the ordinary photolysis device. So, compared with the ordinary photocatalytic device, the rate of oxygen evolution and the life time of the catalyst are improved in the self-assembly light energy conversion device.

 

Key words: light energy conversion device; photocatalytic activity; O2 evolution; oxygen vacancy; photo splitting water

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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