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Journal of Sol-Gel Science and Technology
Published in: Journal of Sol-Gel Science and Technology 2/2017

22-05-2017 | Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)

Facile preparation of flower-like Bi2WO6/CdS heterostructured photocatalyst with enhanced visible-light-driven photocatalytic activity for Cr(VI) reduction

Authors: Yufang Liu, Shanshan Liu, Tingting Wu, Huiming Lin, Xu Zhang

Published in: Journal of Sol-Gel Science and Technology | Issue 2/2017

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Abstract

Visible-light-driven CdS loaded flower-like Bi2WO6 (Bi2WO6/CdS) heterostructured photocatalyst with surface-enrich CdS nanoparticles were prepared successfully by using a facile two-step method. The as-prepared photocatalyst was characterized by X-ray diffraction, scanning electron microscopy, and UV–Vis diffuse reflectance spectrum. The band gaps of the samples were estimated based on diffuse reflectance spectrum results. The as-prepared Bi2WO6/CdS heterostructured photocatalyst was used as catalysts in reduction of Cr(VI) to Cr(III) under visible light irradiation, and enhanced photocatalytic activities were observed as compared to pure flower-like Bi2WO6 and CdS nanoparticles. The origin of the excellent performance of the catalyst as well as the mechanism of photoreduction was discussed. Effective electron–hole separation and variation of band gap due to the formation of type II heterostructure is believed to be responsible to the much improved reaction rate.

Graphical Abstract

Flower-like Bi2WO6/CdS heterostructures was used to photoreduce toxic Cr(VI) to Cr(III) under visible light irradiation. 99% reduction of Cr(VI) could be reached within 10 min. It is found that the heterogenization favors the facilitated interfacial charge transfer and inhibited electron–hole recombination. https://static-content.springer.com/image/art%3A10.1007%2Fs10971-017-4416-x/MediaObjects/10971_2017_4416_Figa_HTML.gif
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Metadata
Title
Facile preparation of flower-like Bi2WO6/CdS heterostructured photocatalyst with enhanced visible-light-driven photocatalytic activity for Cr(VI) reduction
Authors
Yufang Liu
Shanshan Liu
Tingting Wu
Huiming Lin
Xu Zhang
Publication date
22-05-2017
Publisher
Springer US
Published in
Journal of Sol-Gel Science and Technology / Issue 2/2017
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-017-4416-x

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