Issue 39, 2013
From the journal:

CrystEngComm

The preparation and characterization of composite bismuth tungsten oxide with enhanced visible light photocatalytic activity

Shifu Chen,*ab   Wenming Tang,a   Yingfei Hua  and  Xianliang Fua  

* Corresponding authors

a Department of Chemistry, Huaibei Normal University, Huaibei, Anhui, People's Republic of China
E-mail: chshifu@chnu.edu.cn
Fax: +86-561-3090518
Tel: +86-561-3806611

b Department of Chemistry, Anhui Science and Technology University, Fengyang, Anhui, People's Republic of China

Abstract

A composite photocatalyst (Bi3.84W0.16O6.24–Bi2WO6) containing Bi, W and O elements was prepared by a facile hydrothermal method. Various characterization methods such as X-ray powder diffraction, UV-vis diffuse reflectance spectroscopy, scanning electron microscopy and transmission electron microscopy were employed to investigate the structure and optical properties. The activities of the samples were evaluated by the photocatalytic degradation of methylene blue under visible light irradiation. The results showed that when the pH of the precursor solution is 12.3, and a hydrothermal treatment at 140 °C for 20 h was used, the prepared sample shows the mixed phases of Bi3.84W0.16O6.24 and Bi2WO6. The Bi3.84W0.16O6.24–Bi2WO6 composite exhibited an enhanced photocatalytic activity compared with single Bi2WO6 or Bi3.84W0.16O6.24. The rate constant of Bi3.84W0.16O6.24–Bi2WO6 is about 5 times that of Bi2WO6. It is proposed that the increased photocatalytic activity may be attributed to the formation of a heterojunction between Bi3.84W0.16O6.24 and Bi2WO6, which suppresses the recombination of photoexcited electron–hole pairs.

Graphical abstract: The preparation and characterization of composite bismuth tungsten oxide with enhanced visible light photocatalytic activity

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Article information

DOI
https://doi.org/10.1039/C3CE41036F
Article type
Paper
Submitted
06 Jun 2013
Accepted
06 Aug 2013
First published
07 Aug 2013

CrystEngComm, 2013,15, 7943-7950

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The preparation and characterization of composite bismuth tungsten oxide with enhanced visible light photocatalytic activity

S. Chen, W. Tang, Y. Hu and X. Fu, CrystEngComm, 2013, 15, 7943 DOI: 10.1039/C3CE41036F

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