Nanocrystal Cu2O-loaded TiO2 nanotube array films as high-performance visible-light bactericidal photocatalyst

被引：26

作者：

Zhang, Shengsen ^{[1
,2
]}

Liu, Chang ^{[1
,2
]}

Liu, Xiaolu ^{[1
,2
]}

Zhang, Haimin ^{[1
,2
]}

Liu, Porun ^{[1
,2
]}

Zhang, Shanqing ^{[1
,2
]}

Peng, Feng ^{[3
]}

Zhao, Huijun ^{[1
,2
]}

机构：

[1] Griffith Univ, Ctr Clean Environm & Energy, Gold Coast, Qld 4222, Australia

[2] Griffith Univ, Griffith Sch Environm, Gold Coast, Qld 4222, Australia

[3] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Peoples R China

来源：

APPLIED MICROBIOLOGY AND BIOTECHNOLOGY | 2012年 / 96卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Cu2O; TiO2; nanotube; Visible light; Bactericidal photocatalyst; INACTIVATION; ELECTRODES;

D O I：

10.1007/s00253-012-4233-7

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

In this work, we report the use of a non-toxic nanocrystal Cu2O-loaded TiO2 nanotube array (Cu2O/TNTs) film as high-performance visible-light bactericidal photocatalyst. The samples were characterized by field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet-visible diffusion reflection spectroscopy. This Cu2O/TNTs film photocatalyst is capable of complete inactivation of Escherichia coli in 5 x 10(7) colony-forming units/mL within a record short disinfection time of 20 min under visible-light irradiation. The average bactericidal percentage of the Cu2O/TNTs for E. coli under visible-light irradiation are 20 times and 6.6 times higher than those of TNTs under the same conditions and Cu2O/TNTs without light, respectively. This superior bactericidal performance is mainly attributed to the high ability to produce OH radicals by both photogenerated electron and hole of the prepared photocatalyst under visible light. The Cu2O/TNTs film photocatalyst makes it applicable to broad fields including drinking water disinfection.

引用

页码：1201 / 1207

页数：7

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