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Applied Surface Science
Year: 2009  |  Volume: 255  |  Issue: 6  |  Page No.: 3731 - 3738

Rare earth oxide-doped titania nanocomposites with enhanced photocatalytic activity towards the degradation of partially hydrolysis polyacrylamide

Jinhuan Li, Xia Yang, Xiaodan Yu, Leilei Xu, Wanli Kang, Wenhua Yan, Hongfeng Gao, Zhonghe Liu and Yihang Guo    

Abstract: Rare-earth oxide-doped titania nanocomposites (RE3+/TiO2, where RE=Eu3+, Pr3+, Gd3+, Nd3+, and Y3+) were prepared by a one-step sol–gel-solvothermal method. The products exhibited anatase phase structure, mesoporosity, and interesting surface compositions with three oxygen species and two titanium species. The products were used as the photocatalysts to degrade a partially hydrolysis polyacrylamide (HPAM) under UV-light irradiation, a very useful polymer in oil recovery. For comparison, Degussa P25 and as-prepared pure TiO2 were also tested under the same conditions. The enhanced photocatalytic activity was obtained on as-prepared Eu3+ (Gd3+, Pr3+)/TiO2 composites, and the reasons were explained. Finally, the degradation pathway of HPAM over the RE3+/TiO2 composite was put forward based on the intermediates produced during the photocatalysis procedure.

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