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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Immobilization of BiOBr/BiOI Hierarchical Microspheres on Fly Ash Cenospheres as Visible Light Photocatalysts

Li Lin A B , Ya Wang A , Manhong Huang A D and Donghui Chen A C D
+ Author Affiliations
- Author Affiliations

A School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.

B School of Chemical and Environmental Engineering, Hunan City University, Yiyang 413000, China.

C Shanghai Institute of Technology, Shanghai 200235, China.

D Corresponding authors. Email: chendh@dhu.edu.cn; egghmh@163.com

Australian Journal of Chemistry 69(1) 119-125 https://doi.org/10.1071/CH15157
Submitted: 5 April 2015  Accepted: 22 June 2015   Published: 24 July 2015

Abstract

Three-dimensional (3D) BiOBr/BiOI hierarchical microspheres were successfully fabricated on the surface of fly ash cenospheres (FACs) via a facile one-pot solvothermal method for the first time. The as-prepared samples were characterized by XRD, SEM, energy-dispersive X-ray spectroscopy, UV–visible diffuse reflectance spectroscopy, and high-resolution transmission electron microscopy. The results indicated that the loaded hierarchical microspheres exhibited a uniform distribution, and some aggregation was observed. These well-dispersed hierarchical microspheres were composed of 2D nanosheets, which possess heterojunction structures. Based on the photodegradation tests examining the removal of rhodamine B from water under visible light irradiation (λ > 420 nm), the photocatalytic activity of BiOB/BiOI/FACs was superior to that of BiOBr/FACs and BiOI/FACs. A proposed mechanism for the enhanced photocatalytic activity displayed by BiOB/BiOI/FACs is discussed.


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