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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2006,Vol.22>> Issue(08)>> 953-957     doi: 10.3866/PKU.WHXB20060809         中文摘要
Photocatalytic Activity of Au Modified Nano-TiO2 for NPE-10 Degradation
FENG Chun-Bo;DU Zhi-Ping;Zhao Yong-Hong;TAI Xiu-Mei;LI Qiu-Xiao
China Research Institute of Daily Chemical Industry, Taiyuan 030001
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The Au modified nanosized titanium oxide (TiO2) powders were prepared by sol-gel route at ambient temperature using Ti(OC4H9)4 and HAuCl4 as raw materials. The as-prepared samples were analyzed by XRD, BET, XPS and UV-visible absorption spectra technique. Photodegration for non-ionic surfactant Nonylphenyl poly(oxyethylene)ethers (NPE-10) has been carried out in air-equilibrated Au/TiO2 suspensions. The results suggest that the conformation of Au in the TiO2 composite was largely dependent on concentration of HAuCl4 during the preparation and the Au/TiO2 heat-treated temperature. The doped Au may take place Ti4+ in the lattices of TiO2 as Au3+ or exist at surface of TiO2 particles as atoms. The former may contribute to light adsorption range from.480 to 650 nm and may produce more O vacancies; the later may become the acceptor of photoinduced e- leading to a decrease of e-/h+ recombination. The preparation parameters were optimized by means of NPE-10 degradation. The optimized catalyst was obtained at Au/Ti molar ratio of 0.005 and calcined at 500℃. The degradation rate of NPE-10 could be up to 91.8% after irradiated 4 h in sunlight compared to 66% for the rate of TiO2-P-25 and 50.2% for the rate of no-doping TiO2 .

Keywords: Au/TiO2   sol-gel method   visible light response   photocatalytic degradation   NPE-10  
Received: 2006-01-19 Accepted: 2006-03-20 Publication Date (Web): 2006-07-07
Corresponding Authors: DU Zhi-Ping Email: cridci_fcb@163.com


Cite this article: FENG Chun-Bo;DU Zhi-Ping;Zhao Yong-Hong;TAI Xiu-Mei;LI Qiu-Xiao . Photocatalytic Activity of Au Modified Nano-TiO2 for NPE-10 Degradation[J]. Acta Phys. -Chim. Sin., 2006,22 (08): 953-957.    doi: 10.3866/PKU.WHXB20060809
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