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A highly efficient TiO2-xCx nano-heterojunction photocatalyst for visible light induced antibacterial applications.

Etacheri, V, Michlits, G, Seery, MK, Hinder, SJ and Pillai, SC (2013) A highly efficient TiO2-xCx nano-heterojunction photocatalyst for visible light induced antibacterial applications. ACS Appl Mater Interfaces.

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Abstract

Visible-light-induced antibacterial activity of carbon-doped anatase-brookite titania nano-heterojunction photocatalysts are reported for the first time. These heterostructures were prepared using a novel low temperature (100 °C) non-hydrothermal low power microwave (300 W) assisted method. Formation of interband C 2p states was found to be responsible for the band gap narrowing of the carbon doped heterojunctions. The most active photocatalyst obtained after 60 minutes of microwave irradiation exhibits a 2-fold higher visible-light induced photocatalytic activity in contrast to the standard commercial photocatalyst Evonik-Degussa P-25. Staphylococcus aureus inactivation rate constant for carbon-doped nano-heterojunctions and the standard photocatalyst was 0.0023 and -0.0081 min-1 respectively. It is proposed that the photo-excited electrons (from the C 2p level) are effectively transferred from the conduction band of brookite to that of anatase causing efficient electron-hole separation, which is found to be responsible for the superior visible-light induced photocatalytic and antibacterial activities of carbon-doped anatase-brookite nano-heterojunctions.

Item Type: Article
Authors :
NameEmailORCID
Etacheri, VUNSPECIFIEDUNSPECIFIED
Michlits, GUNSPECIFIEDUNSPECIFIED
Seery, MKUNSPECIFIEDUNSPECIFIED
Hinder, SJs.hinder@surrey.ac.ukUNSPECIFIED
Pillai, SCUNSPECIFIEDUNSPECIFIED
Date : 5 February 2013
Identification Number : 10.1021/am302676a
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:41
Last Modified : 17 May 2017 15:05
URI: http://epubs.surrey.ac.uk/id/eprint/836350

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