TITLE

A passivated codoping approach to tailor the band edges of TiO2 for efficient photocatalytic degradation of organic pollutants

AUTHOR(S)
Dan Wang; Yanhong Zou; Shuangchun Wen; Dianyuan Fan
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/6/2009, Vol. 95 Issue 1, p012106
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We propose an effective passivated codoping approach to tailor the band edges of TiO2 by doping the host with group IVA and group VIB impurities to passive donor-acceptor complexes. A way of achieving p-type TiO2 is found, which can outspread the application range of TiO2 semiconductor. It is demonstrated that the carbon (C)/tungsten (W) codoped TiO2 has a substantial increase in the valence band edge, while leaving the conduction band edge almost unchanged, thus improving the efficiency of photocatalytic degradation of organic pollutants. In principle, the suggested approach for overcoming the p-type doping bottleneck can be applied to other wide-band-gap semiconductors.
ACCESSION #
43158452

 

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