Unprecedented Eighteen-Faceted BiOCl with a Ternary Facet Junction Boosting Cascade Charge Flow and Photo-redox
Unprecedented Eighteen-Faceted BiOCl with a Ternary Facet Junction Boosting Cascade Charge Flow and Photo-redox
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前所未有的十八面 BiOCl，具有三元面结，可增强级联电荷流和光氧化还原
DOI：
10.1002/anie.201904921
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发表时间：
2019-07-08
影响因子：
16.6
通讯作者：
Zhang, Yihe
中科院分区：
文献类型：
--
作者：
Li, Min;Yu, Shixin;Zhang, Yihe
各向异性晶体刻面的暴露允许光激发电子（e（-））和空穴（h（+））的定向转移，用于空间电荷分离。具有高密度低配位原子的高指数小平面总是作为反应性催化位点。然而，制备多晶面或高折射率晶面对于层状铋基光催化剂是高度挑战性的。在此，我们报道了前所未有的十八面BiOCl与{001}顶面和{102}和{112}倾斜面通过水热过程的制备。与具有{001}顶面和{110}侧面的传统BiOCl正方形板相比，十八面BiOCl具有高度增强的光催化活性，用于H-2的释放和羟基自由基（（OH）-O-）。生产理论计算和光沉积结果表明，十八面BiOCl具有良好匹配的{001}/{102}/{112}三元面结，这提供了比BiOCl正方形板中的二元面结更有效的电荷流动的级联路径。
Exposure of anisotropic crystal facets allows the directional transfer of photoexcited electrons (e(-)) and holes (h(+)), for spatial charge separation. High-index facets with a high density of low-coordinated atoms always serve as reactive catalytic sites. However, preparation of multi-facets or high-index facets is highly challenging for layered bismuth-based photocatalysts. Herein, we report the preparation of unprecedented eighteen-faceted BiOCl with {001} top facets and {102} and {112} oblique facets via a hydrothermal process. Compared to the conventional BiOCl square plates with {001} top facets and {110} lateral facets, the eighteen-faceted BiOCl has highly enhanced photocatalytic activity for H-2 evolution and hydroxyl radicals ((OH)-O-.) production. Theoretical calculations and photodeposition results disclose that the of eighteen-faceted BiOCl has a well-matched {001}/{102}/{112} ternary facet junction, which provides a cascade path for more efficient charge flow than the binary facet junction in BiOCl square plates.