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Molecules 2016, 21(5), 666; doi:10.3390/molecules21050666

BiOBr/BiOI Photocatalyst Based on Fly Ash Cenospheres with Improved Photocatalytic Performance

1,2,* , 2
and
2,3,*
1
School of Chemical and Environmental Engineering, Hunan City University, Yiyang 413000, China
2
School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
3
Shanghai Institute of Technology, Shanghai 200235, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 27 March 2016 / Revised: 8 May 2016 / Accepted: 16 May 2016 / Published: 19 May 2016
(This article belongs to the Section Photochemistry)
View Full-Text   |   Download PDF [2327 KB, uploaded 19 May 2016]   |  

Abstract

A series of BiOBr/BiOI photocatalysts supported on fly-ash cenospheres (FACs) were successfully prepared via a facile one-pot alcoholysis method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectrometer (XPS) and UV-visible diffuse reflectance spectroscopy (DRS). The results indicate that pH value plays a critical role in BiOBr/BiOI loading. Based on the photodegradation tests under visible light irradiation (blue LED irradiation), the photocatalytic property of BiOBr/BiOI/FACs photocatalysts obtained under alkaline conditions is superior to that prepared under neutral or acidic conditions, and higher than those of BiOB/FACs and BiOI//FACs. The improved photocatalytic performance of BiOBr/BiOI/FACs can be attributed to more BiOBr/BiOI loaded on the surface of FACs and the efficient photogenerated electron-hole separation. View Full-Text
Keywords: BiOBr/BiOI; fly-ash cenospheres; photocatalytic activity; pH value BiOBr/BiOI; fly-ash cenospheres; photocatalytic activity; pH value
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Lin, L.; Huang, M.; Chen, D. BiOBr/BiOI Photocatalyst Based on Fly Ash Cenospheres with Improved Photocatalytic Performance. Molecules 2016, 21, 666.

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