title: BiOBr/BiOI Photocatalyst Based on Fly Ash Cenospheres with Improved Photocatalytic Performance.
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.
authors.affiliation: School of Chemical and Environmental Engineering, Hunan City University, Yiyang 413000, China. linlilejin@126.com.|School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China. linlilejin@126.com.
authors.forename: Li
authors.initials: L
authors.lastname: Lin
authors.affiliation: School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China. egghmh@163.com.
authors.forename: Manhong
authors.initials: M
authors.lastname: Huang
authors.affiliation: School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China. chendh@dhu.edu.cn.|Shanghai Institute of Technology, Shanghai 200235, China. chendh@dhu.edu.cn.
authors.forename: Donghui
authors.initials: D
authors.lastname: Chen
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D002384:Catalysis; D060729:Coal Ash / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D055668:Photochemical Processes; D056951:Photoelectron Spectroscopy
chemical_list: D060729:Coal Ash; C542279:bismuth oxybromide; D001729:Bismuth
keywords: BiOBr/BiOI; fly-ash cenospheres; pH value; photocatalytic activity