Bismuth-rich Bi4O5X2 (X = Br, and I) nanosheets with dominant {101} facets exposure for photocatalytic H2 evolution
Bismuth-rich Bi4O5X2 (X = Br, and I) nanosheets with dominant {101} facets exposure for photocatalytic H2 evolution
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DOI：
10.1016/j.cej.2016.06.100
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发表时间：
2016-11-15
影响因子：
15.1
通讯作者：
Ye, Liqun
中科院分区：
文献类型：
--
作者：
Bai, Yang;Chen, Ting;Ye, Liqun
到目前为止，由于 CB 位置正，BiOBr 和 BiOI 尚未用于光催化 H-2 析出。在这项工作中，采用富铋策略来提升 CB 位置。通过分子前体水解途径合成了具有显着{101}面暴露的 Bi4O5X2 (X = Br, I) 纳米片。 Bi4O5Br2 和 Bi4O5I2 样品通过 X 射线衍射图样 (XRD)、透射电子显微镜 (TEM)、紫外-可见漫反射光谱 (DRS)、X 射线光电子能谱 (XPS) 和光电化学测量进行表征。 Bi4O5Br2 对于 H-2 生产表现出比 Bi4O5I2 更高的光催化活性。 Bi4O5Br2的H-2析出速率达到6.81 ltmol h(-1)，420 nm处的表观量子效率为0.93%。这是第一篇报道使用 Bi4O5X2 光催化剂光催化制氢的工作。 (C) 2016 Elsevier B.V. 保留所有权利。
Until now, BiOBr and BiOI are not used for photocatalytic H-2 evolution due to the positive CB position. In this work, bismuth-rich strategy is used to promote the CB position. Bi4O5X2 (X = Br, I) nanosheets with dominant {101} facets exposure are synthesized by molecular precursors hydrolysis route. Bi4O5Br2 and Bi4O5I2 samples were characterized by X-ray diffraction patterns (XRD), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra (DRS), X-ray photoelectron spectroscopy (XPS) and photoelectrochemical measurements. Bi4O5Br2 displays higher photocatalytic activity than Bi4O5I2 for H-2 production. And the H-2 evolution rate of Bi4O5Br2 reach 6.81 ltmol h(-1) with the apparent quantum efficiency of 0.93% at 420 nm. It is the first work to report photocatalytic H2 production using Bi4O5X2 photocatalysts. (C) 2016 Elsevier B.V. All rights reserved.