Effect of Native Defects on Photocatalytic Properties of ZnO

被引：252

作者：

Guo, Mu Yao ^{[1
]}

Ng, Alan Man Ching ^{[1
]}

Liu, Fangzhou ^{[1
]}

Djurisic, Aleksandra B. ^{[1
]}

Chan, Wai Kin ^{[2
]}

Su, Huimin ^{[3
]}

Wong, Kam Sing ^{[3
]}

机构：

[1] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[2] Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China

[3] Hong Kong Univ Sci & Technol, Dept Phys, Clear Water Bay, Hong Kong, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 22期

关键词：

PHOTOLUMINESCENCE; NANOSTRUCTURES; PERFORMANCE; DEGRADATION; POWDERS;

D O I：

10.1021/jp200926u

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：

We have studied the photocatalytic activity of ZnO tetrapods, ZnO powder, and different ZnO nanoparticles. While nanoparticles with small particle size exhibited higher Brunauer-Emmett-Teller (BET) surface area, tetrapods exhibited significantly higher photocatalytic activity for degradation of different dyes. Degradation of four different dyes has been achieved for at least 5 times shorter time for tetrapods compared to nanoparticles (20 nm average particle size). Different ZnO samples have been characterized by variable-temperature photoluminescence and time-resolved photoluminescence measurements, and the relationship between optical properties, native defects, production of the reactive oxygen species, and photocatalytic dye degradation has been discussed.

引用

页码：11095 / 11101

页数：7

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