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Surface Na2CO3 etching induced activity enhancement of 2D BiOI photocatalyst working under visible light

查看全文 作　　者：Lei [1]Liang;Jing [1,2]Cao;Haili [1,2]Lin;Shifu [1]Chen 高影响力作者 机构地区：[1]College of Chemistry and Materials Science/Information College, Huaibei Normal University, Huaibei 235000, China;[2]Anhui Key Laboratory of Energetic Materials, Huaibei 235000, China高影响力机构 出　　处：《Science Bulletin》索引2017年第62卷第8期,共8页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China (51472005, 51272081);the Natural Science Foundation of Educational Committee of Anhui Province (gxyq ZD2016413, gxyq ZD2016414, and KJ2015A027);the Natural Science Foundation of Anhui Province (1708085MB32);Innovation Team of Design and Application of Advanced Energetic Materials 摘　　要：The visible light photocatalytic activity of two-dimensional(2D) BiOI microplates was intensively enhanced through simply dipping in Na_2CO_3 solutions at room temperature. The X-ray powder diffraction(XRD) and scanning electron microscopy(SEM) investigations suggest that little amount of(BiO)_2CO_3phase was formed on the surface of 2D BiOI via the in situ chemical conversion. The concentration of Na_2CO_3 solutions affected the structure, morphology, light absorption and surface element component of 2D BiOI. The surface loaded(BiO)_2CO_3mainly trapped the photoinduced electrons of BiOI, improved the separation efficiency of photocharges and finally raised the photocatalytic activity of BiOI under visible light(k > 420 nm). Furthermore, the product of the as-prepared(BiO)_2CO_3/BiOI displayed excellent stability in the repeated experiment. This study provides a facile way to improve the photocatalytic activity of BiOX(X = Cl, Br, I) by means of surface treatment with Na_2CO_3 solutions. 关 键 词：光催化活性 光催化剂 表面刻蚀 可见光 二维 NA2CO3 X射线粉末衍射法 扫描电子显微镜
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