Journal of Jilin University Science Edition

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Preparation, Characterization and Photocatalytic Activity ofKeggin Type of Phosphotungstic Acid Salts

CAO Junxia, LIU Chunli, LIAO Liling   

  1. School of Chemistry and Material Science, Guizhou Normal University, Guiyang 550001, China
  • Received:2012-11-12 Online:2013-09-26 Published:2013-09-17
  • Contact: LIAO Liling E-mail:lll6383@163.com

Abstract:

Six phosphotungstic acid salts of Keggin type such as Mg1.5PW12O40,Ba1.5PW12O40,Ca1.5PW12O40,Na3PW12O40,K3PW12O40and (NH4)3PW12O40 were prepared by means of liquid phase method and the surface morphologies and microstructures of the samples were characterized by Xray diffraction (XRD) and transmission electron microscopy (TEM). The photocatalytic activities of the catalysts were investigated by photocatalytic degradation of methyl orange with  250 W high pressure mercury lamp as ultraviolet light source. The results show that the six salt particles keep basic Keggin structure frame, belonging to the Keggin structure heteropoly acid type catalyst. The catalysts that have the better activities for the degradation of methyl orange are Mg1.5PW12O40,Ba1.5PW12O40and Ca1.5PW12O40, among which Mg1.5PW12O40 is the best.

Key words: phosphotungstic acid salts, preparation, photocatalysis

CLC Number: 

  • O61