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Citation: 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 Physico-Chimica Sinica, ;2006, 22(08): 953-957. doi: 10.3866/PKU.WHXB20060809 shu

Photocatalytic Activity of Au Modified Nano-TiO₂ for NPE-10 Degradation

1.
China Research Institute of Daily Chemical Industry, Taiyuan 030001

Received Date: 19 January 2006
Available Online: 7 July 2006

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 .
- Au/TiO2;sol-gel method;visible light response;photocatalytic degradation;NPE-10
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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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Photocatalytic Activity of Au Modified Nano-TiO2 for NPE-10 Degradation

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通讯作者: 陈斌, bchen63@163.com

Photocatalytic Activity of Au Modified Nano-TiO₂ for NPE-10 Degradation