Issue 4, 2014

Surface oxygen vacancy induced photocatalytic performance enhancement of a BiPO4 nanorod

Abstract

A high concentration of surface oxygen vacancies were successfully introduced on the BiPO4−x nanorods via controllable hydrogen reduction. The BiPO4−x sample with surface oxygen vacancies shows a light-gray color, although the absorption sharp edge is not changed (still about 300 nm), the absorbance enhances in the range of 300–800 nm. The enhanced level of photocatalytic performance and photocurrent are both influenced by the concentration and extent of oxygen vacancies, which can be controlled by tuning hydrogen reduction temperature and time. Only high-concentration oxygen vacancies formed on the surface layers of BiPO4 can greatly improve the photocatalytic performance and photocurrent, while bulk oxygen vacancies will decrease the performance. The increasing of surface oxygen vacancies can results in broadening of the valence band width and narrowing of the bandgap, which can effect enhancement of the photoactivity and photocurrent, and extending the photoresponse wavelength range.

Graphical abstract: Surface oxygen vacancy induced photocatalytic performance enhancement of a BiPO4 nanorod

Supplementary files

Article information

Article type
Paper
Submitted
25 Sep 2013
Accepted
31 Oct 2013
First published
01 Nov 2013

J. Mater. Chem. A, 2014,2, 1174-1182

Surface oxygen vacancy induced photocatalytic performance enhancement of a BiPO4 nanorod

Y. Lv, Y. Liu, Y. Zhu and Y. Zhu, J. Mater. Chem. A, 2014, 2, 1174 DOI: 10.1039/C3TA13841K

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