Bismuth-rich Bi4O5X2 (X = Br, and I) nanosheets with dominant {101} facets exposure for photocatalytic H2 evolution

被引：160

作者：

Bai, Yang ^{[1
,3
]}

Chen, Ting ^{[1
,4
]}

Wang, Pingquan ^{[1
,3
]}

Wang, Li ^{[2
]}

Ye, Liqun ^{[1
,2
]}

机构：

[1] Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Peoples R China

[2] Nanyang Normal Univ, Coll Chem & Pharmaceut Engn, Key Lab Ecol Secur Water Source Reg Midline Proje, Nanyang 473061, Peoples R China

[3] Southwest Petr Univ, Sch Oil & Nat Gas Engn, Chengdu 610500, Peoples R China

[4] Southwest Petr Univ, Coll Chem & Chem Engn, Chengdu 610500, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2016年 / 304卷

基金：

中国国家自然科学基金;

关键词：

Hydrogen; Photocatalysis; Bi4O5X2; Bismuth-rich; Facet; MOLECULAR-OXYGEN ACTIVATION; BIOX X; ULTRATHIN NANOSHEETS; CL; REMOVAL; WATER; PERFORMANCE; OXYBROMIDE; VACANCIES;

D O I：

10.1016/j.cej.2016.06.100

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页码：454 / 460

页数：7

共 34 条

[1] Efficient Photocatalytic Removal of NO in Indoor Air with Hierarchical Bismuth Oxybromide Nanoplate Microspheres under Visible Light [J].