Photocatalytic properties of hierarchical BiOXs obtained via an ethanol-assisted solvothermal process

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• 作者：Manke Jia¹ ; ² ; ³ ; ^{jiamanke@yeah.net" class="auth_mail" title="E-mail the corresponding author} ; Xiaolong Hu² ; ³ ; Shulian Wang¹ ; ² ; ³ ; Yingping Huang¹ ; ² ; ^{chem_ctgu@126.com" class="auth_mail" title="E-mail the corresponding author} ; Lirong Song¹ ; ^{lrsong@ihb.ac.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：BiOXs (XCl ; Br ; I) ; Ethanol-assisted solvothermal process ; Photocatalytic properties
• 刊名：Journal of Environmental Sciences
• 出版年：2015
• 出版时间：1 September 2015
• 年：2015
• 卷：35
• 期：Complete
• 页码：172-180
• 全文大小：776 K

文摘

In this study, bismuth oxyhalide (BiOXs (X<img border="0" alt="double bond; length as m-dash" data-inlimg="/entities/dbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">ipt><img border="0" alt="double bond; length as m-dash" src="http://cdn.els-cdn.com/sd/entities/dbnd" class="glyphImg">ipt>Cl, Br, I)) semiconductors were prepared by a simple solvothermal method, with ethanol serving as solvent and a series of tetrabutylammonium halide surfactants as halogen sources. Under identical synthetic conditions, BiOBr was more readily constructed into regular flower-like hierarchical architectures. The photocatalytic properties of the materials were studied by monitoring the degradation of rhodamine B (RhB), with visible light absorption, and colorless salicylic acid (SA). It was found that both RhB and SA were rapidly degraded on the surface of BiOBr. BiOCl was rather active for the degradation of RhB, but ineffective toward the degradation of SA. However, neither RhB nor SA could be degraded effectively in the case of BiOI. Further experiments such as UV–visible spectroscopy and detection of ^{<img border="0" alt="radical dot" data-inlimg="/entities/rad" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">ipt><img border="0" alt="radical dot" src="http://cdn.els-cdn.com/sd/entities/rad" class="glyphImg">ipt>}OH and O₂^{<img border="0" alt="radical dot" data-inlimg="/entities/rad" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">ipt><img border="0" alt="radical dot" src="http://cdn.els-cdn.com/sd/entities/rad" class="glyphImg">ipt>&minus;} radicals suggest that the electronic structure of the BiOX photocatalysts is responsible for the difference in their activities.