Factors impacted on anisotropic photocatalytic oxidization activity of ZnO: Surface band bending, surface free energy and surface conductance

被引：33

作者：

Li, Guoqiang ^{[1
,2
,3
]}

Yi, Zhiguo ^{[4
]}

Wang, Hongtao ^{[1
,2
,3
]}

Jia, Caihong ^{[1
,2
,3
]}

Zhang, Weifeng ^{[1
,2
]}

机构：

[1] Henan Univ, Key Lab Photovolta Mat Henan Prov, Kaifeng 475004, Peoples R China

[2] Henan Univ, Sch Phys & Elect, Kaifeng 475004, Peoples R China

[3] Henan Univ, Inst Phys Microsyst, Kaifeng 475004, Peoples R China

[4] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Fujian, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2014年 / 158卷

基金：

中国国家自然科学基金;

关键词：

ZnO; Photocatalysis; Crystal plane; Anisotropy; THIN-FILMS; COMPOSITION DEPENDENCE; RAMAN-SCATTERING; NANOCRYSTALS; DEFECTS; SHAPE; NANOSTRUCTURES; ORIENTATION; GA;

D O I：

10.1016/j.apcatb.2014.04.034

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：

ZnO thin films with three low-indexed crystal planes were prepared by pulsed laser deposition and investigated for photocatalytic activity. The results revealed that the ZnO showed anisotropic photocatalytic activity and the order of activity for methylene orange and dichlorophene decomposition was (0 0 1) < (1 0 0) < (1 1 0). The highest photocatalytic activity of the (1 1 0) crystal plane orientated sample was ascribed to the more upward surface band bending, higher surface free energy and larger surface conductance. These results implied that synthesizing the (1 1 0) facet exposed ZnO sample would be an effective approach for the obtainment of higher activity. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：280 / 285

页数：6

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