Preparation and Characterization of Microporous Nano-Tungsten Trioxide and Its Photocatalytic Activity after Doping Rare Earth
来源期刊：JOURNAL OF RARE EARTHS2006年第1期
论文作者：Zou Lixia Liu Qingcheng Zhong Qin
Key words：tungstic acid gels; washing and centrifuging; microporous; specific surface area; photocatalytic; rare earth oxides;
Abstract: Aqueous sols and gels of tungstic acid were prepared from Na2WO4 with protonated cation-exchange resin. Nano-tungsten oxide of a microporous lamella was synthesized by means of washing of WO3*2H2O with distilled water under ultrasonic wave agitation and centrifuging repeatedly, and the specific surface area tended to increase gradually with washing and centrifuging. The sample of centrifuged 7 h has more than 2 times highs specific surface area and more high photocatalytic activity . The mechanisms are also discussed.
Zou Lixia1，Liu Qingcheng1，Zhong Qin2
(1.Department of Applied Chemistry, East China Technology Institute, Fuzhou 344000, China;
2.College of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
Abstract:Aqueous sols and gels of tungstic acid were prepared from Na2WO4 with protonated cation-exchange resin. Nano-tungsten oxide of a microporous lamella was synthesized by means of washing of WO3*2H2O with distilled water under ultrasonic wave agitation and centrifuging repeatedly, and the specific surface area tended to increase gradually with washing and centrifuging. The sample of centrifuged 7 h has more than 2 times highs specific surface area and more high photocatalytic activity . The mechanisms are also discussed.
Key words:tungstic acid gels; washing and centrifuging; microporous; specific surface area; photocatalytic; rare earth oxides;
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