A 3D AgCl Hierarchical Superstructure Synthesized by a Wet Chemical Oxidation Method
A 3D AgCl Hierarchical Superstructure Synthesized by a Wet Chemical Oxidation Method
复制标题
湿化学氧化法合成的 3D AgCl 多级超结构
DOI：
10.1002/chem.201201418
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发表时间：
2012-12-01
影响因子：
4.3
通讯作者：
Liu, Yuanyuan
中科院分区：
文献类型：
--
作者：
Lou, Zaizhu;Huang, Baibiao;Liu, Yuanyuan
采用湿化学氧化法合成了一种新型的三维AgCl分级超结构，这种超结构沿着晶种方向快速生长< 111 >。利用扫描电子显微镜和X射线衍射分析了薄膜的形貌结构和生长过程。通过晶体学取向分析了晶体结构。用密度泛函理论计算了AgCl晶面{100}、{110}和{111}的表面能随Cl-离子吸收的变化。基于实验和计算结果，提出了一个合理的机制来说明三维AgCl分级超结构的形成。在可见光照射下，三维AgCl分级超结构的活性中心较多，其光催化活性优于凹型和立方型超结构。
A novel 3D AgCl hierarchical superstructure, with fast growth along the < 111 > directions of cubic seeds, is synthesized by using a wet chemical oxidation method. The morphological structures and the growth process are investigated by scanning electron microscopy and X-ray diffraction. The crystal structures are analyzed by their crystallographic orientations. The surface energy of AgCl facets {100}, {110}, and {111} with absorbance of Cl- ions is studied by density functional theory calculations. Based on the experimental and computational results, a plausible mechanism is proposed to illustrate the formation of the 3D AgCl hierarchical superstructures. With more active sites, the photocatalytic activity of the 3D AgCl hierarchical superstructures is better than those of concave and cubic ones in oxygen evolution under irradiation by visible light.