Photodegradation of 4-chlorophenol by UV/photocatalysts: the effect of the interparticle electron transfer process |
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| Authors: | Xin-Hong Ou Chung-Hsin Wu Shang-Lien Lo |
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| Affiliation: | (1) Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, R.O.C.;(2) Department of Environmental Engineering, Da-Yeh University, 112, Shan-Jiau Rd., Da-Tsuen, Chang-Hua 515, Taiwan, R.O.C.;(3) Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan, R.O.C. |
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| Abstract: | Summary This study explores the photodegradation of 4-chlorophenol (4-CP). Coupled-photocatalyst systems are tested to determine whether the interparticle electron transfer (IPET) process improves the photodegradation efficiency. TiO2, ZnO and SnO2 are selected as photocatalysts. In the single-photocatalyst test, ZnO exhibits the highest catalytic activity. The pseudo first-order rate constant of the coupled-catalyst system, ZnO/SnO2, is approximately 22% higher than that of ZnO; these rate constants are 0.95 and 0.78 h-1 at pH 11, respectively. |
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| Keywords: | SnO2 TiO2 interparticle electron transfer process Photodegradation ZnO |
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