Controllable synthesis and visible-light-responsive photocatalytic activity of Bi2WO6 fluffy microsphere with hierarchical architecture

Hui Huang; Hongfeng Chen; Yang Xia; Xinyong Tao; Yongping Gan; Xianxian Weng; Wenkui Zhang

doi:10.1016/j.jcis.2011.12.056

Controllable synthesis and visible-light-responsive photocatalytic activity of Bi2WO6 fluffy microsphere with hierarchical architecture

J Colloid Interface Sci. 2012 Mar 15;370(1):132-8. doi: 10.1016/j.jcis.2011.12.056. Epub 2011 Dec 29.

Authors

Hui Huang¹, Hongfeng Chen, Yang Xia, Xinyong Tao, Yongping Gan, Xianxian Weng, Wenkui Zhang

Affiliation

¹ College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, China.

PMID: 22261273
DOI: 10.1016/j.jcis.2011.12.056

Abstract

Bismuth tungstate (Bi(2)WO(6)) has attracted great research interest as an important visible-light-responsive photocatalyst. In this paper, we report a facile hydrothermal route for the shape-controlled synthesis of micro/nanostructured Bi(2)WO(6), without adding surfactants or templates. The results show that various morphologies of Bi(2)WO(6) including coralloid spherical particles, packed nanosheets, fluffy microspheres, and plates can be obtained by adjusting the pH values of the precursors. The as-prepared porous fluffy microspheres with a hierarchical architecture synthesized at pH 8 exhibit the highest photocatalytic activity for the degradation of Rhodamine (RhB) under visible light irradiation. The photodegradation efficiency reaches as high as 99% within 20 min irradiation. This enhanced photocatalytic activity can be attributed to the unique porous structure and high BET surface area of fluffy microspheres with hierarchical architecture.