Crystal Faces of Cu2O and Their Stabilities in Photocatalytic Reactions

被引：371

作者：

Zheng, Zhaoke ^{[1
]}

Huang, Baibiao ^{[1
]}

Wang, Zeyan ^{[1
]}

Guo, Meng ^{[2
]}

Qin, Xiaoyan ^{[1
]}

Zhang, Xiaoyang ^{[1
]}

Wang, Peng ^{[1
]}

Dai, Ying ^{[2
]}

机构：

[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[2] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 32期

基金：

中国国家自然科学基金;

关键词：

VISIBLE-LIGHT IRRADIATION; SURFACE-STRUCTURE; CUO NANOCRYSTALS; TIO2; ANATASE; SIZE; ZNO; NANOPARTICLES; PERCENTAGE; REACTIVITY;

D O I：

10.1021/jp904198d

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：

Cu2O microcrystals with well-formed facets were synthesized by a simple hydrothermal method. The surface stabilities and photocatalytic properties of Cu2O microcrystals were systematically investigated. Cu2O {100} and {110} facets gradually disappear and transform into nanosheets during the photodegradation of methyl orange (MO) dye. With the increase of irradiation time, Cu2O microcrystals completely transform into nanosheels with {111} facets. The finally formed nanosheets exhibit stable photocatalytic activities. On the basis of both experimental analysis and theoretical calculations, a novel model of charge separation among crystal faces was proposed and the morphology transformation mechanism accompanied by MO bleaching was discussed. It is concluded that Cu2O exposing {111} facets can be used as a stable photocatalyst.

引用

页码：14448 / 14453

页数：6

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