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Enhanced photocatalytic activities on Bi2O2CO3/ZnWO4 nanocomposites

Published online by Cambridge University Press:  27 February 2014

Na Tian ,
Hongwei Huang ,
Yihe Zhang  and
Ying He
Na Tian
Affiliation:
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
Hongwei Huang*
Affiliation:
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
Yihe Zhang*
Affiliation:
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
Ying He*
Affiliation:
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
*
a)Address all correspondence to these authors. e-mail: hhw@cugb.edu.cn
b)e-mail: zyh@cugb.edu.cn
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Abstract

Bi2O2CO3/ZnWO4 composite photocatalysts have been successfully synthesized by a mixed calcination method after hydrothermal process. The catalysts were characterized by powder x-ray diffraction, scanning electron microscopy, transmission electron microscopy, high resolution transmission electron microscopy, x-ray photoelectron spectroscopy, and UV-vis diffuse reflectance spectrum. The results showed that the hierarchical Bi2O2CO3/ZnWO4 nanocomposites were obtained by mixed grinding calcination method and Bi2O2CO3 nanospheres grow on the primary ZnWO4 particles. The Bi2O2CO3/ZnWO4 composites exhibit higher photocatalytic activities compared to pure ZnWO4 and Bi2O2CO3 particles under UV light irradiation. Furthermore, the excellent photocatalytic efficiency of the Bi2O2CO3/ZnWO4 composite was deduced closely related to Bi2O2CO3/ZnWO4 heterojunctions whose presence is generally regarded to be a favorable factor for the separation of photogenerated electrons and holes.

Keywords

Bi2O2CO3/ZnWO4 compositephotoinduced charge transfermethylene blue (MB)photocatalyst
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 5 , 14 March 2014 , pp. 641 - 648
Copyright
Copyright © Materials Research Society 2014 

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