Enhanced Photocatalytic Properties in BiOBr Nanosheets with Dominantly Exposed (102) Facets

被引：171

作者：

Zhang, Haijun ^{[1
,2
]}

Yang, Yuxiao ^{[1
]}

Zhou, Zhen ^{[1
]}

Zhao, Yaping ^{[3
]}

Liu, Lu ^{[1
]}

机构：

[1] Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Inst New Energy Mat Chem,Minist Educ,Key Lab Adv, Tianjin Key Lab Environm Remediat & Pollut Contro, Tianjin 300071, Peoples R China

[2] Anhui Univ, Sch Phys & Mat Sci, Hefei 230039, Peoples R China

[3] E China Normal Univ, Sch Ecol & Environm Sci, Shanghai 200241, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 26期

基金：

美国国家科学基金会;

关键词：

SENSITIZED TIO2; LOW-COST; HETEROSTRUCTURE; 1ST-PRINCIPLES; REMOVAL; WATER;

D O I：

10.1021/jp5035079

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Through first-principles computations, we compared the photocatalytic properties of (102) and (001) facets within BiOBr. Due to the surface states, the (102) facets of BiOBr have lower conduction band minimum and higher valence band maximum, compared with the (001) facets. Therefore, the (102) facets have more efficient electron injection, higher redox potential of photoinduced hole, and smaller band gap, which may result in better photocatalytic performances. Also, we prepared BiOBr-102 and BiOBr-001 samples with dominantly exposed (102) and (001) facets, respectively, and found red-shift absorption, and enhanced photodegradation rate of Rhodamine B in BiOBr-102, which agree well with the computations. Therefore, BiOBr samples with dominantly exposed (102) facets are superior in photocatalysis, and the results demonstrate the critical role of facet orientation in photocatalyst design.

引用

页码：14662 / 14669

页数：8

共 38 条

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