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J Colloid Interface Sci. 2013 Mar 15;394:69-77. doi: 10.1016/j.jcis.2012.12.002. Epub 2012 Dec 22.

Microwave-assisted synthesis and photocatalytic properties of flower-like Bi2WO6 and Bi2O3-Bi2WO6 composite.

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1
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.

Abstract

Flower-like Bi(2)WO(6) and Bi(2)O(3)-Bi(2)WO(6) composite microstructures have been synthesized via a facile and rapid microwave-assisted hydrothermal method through controlling the experimental parameters. The phases and morphologies of the products are characterized by powder X-ray diffraction (XRD), energy dispersion X-ray analysis (EDX), high resolution transmission electron microscopy (HRTEM), and scanning electron microscopy (SEM). Photocatalytic experiments indicate that such Bi(2)O(3)-Bi(2)WO(6) composite possesses higher photocatalytic activity for RhB degradation under visible-light irradiation in comparison with pure Bi(2)O(3) and Bi(2)WO(6). On the basis of the calculated energy band positions, the enhanced photocatalytic activity is attributed to the effective separation of electron-hole pairs between the two semiconductors. The present study provides a new strategy to design composite materials with enhanced photocatalytic activity.

PMID:
23317770
DOI:
10.1016/j.jcis.2012.12.002
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