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

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Title Nanocrystal Cu2O-loaded TiO2 nanotube array films as high-performance visible-light bactericidal photocatalyst
Author Zhang, Shengsen; Liu, Chang; Liu, Xiaolu; Zhang, Haimin; Liu, Porun; Zhang, Shanqing; Peng, Feng; Zhao, Huijun
Journal Name Applied Microbiology and Biotechnology
Year Published 2012
Place of publication Germany
Publisher Springer
Abstract 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 fieldemission 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× 107 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.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1007/s00253-012-4233-7
Volume 96
Issue Number 5
Page from 1201
Page to 1207
ISSN 0175-7598
Date Accessioned 2012-11-26
Date Available 2013-06-18T03:45:57Z
Language en_US
Research Centre Environmental Futures Research Institute
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Environmental Sciences; Inorganic Green Chemistry; Nanomaterials
URI http://hdl.handle.net/10072/48328
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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