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Issue 20, 2007
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Photocatalytic activity of a Bi-based oxychloride Bi4NbO8Cl

Xinping Lin,ac   Tao Huang,b   Fuqiang Huang,*a   Wendeng Wangac  and  Jianlin Shia  
Author affiliations

* Corresponding authors

a State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
E-mail: huangfq@mail.sic.ac.cn
Fax: +86-21-52413903
Tel: +86-21-52411620

b College of Chemistry and Material Science, South-Central University for Nationalities, Wuhan 430074, China

c Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

Abstract

The Bi-based oxychloride Bi4NbO8Cl with a layered structure was studied as a novel efficient photocatalyst. The compound prepared by a solid state reaction method has a band gap of 2.38 eV. It possesses an excellent visible-light-response ability. The visible-light-driven photocatalytic activities for degrading methyl orange (MO) over different catalysts follow the decreasing order of Bi4NbO8Cl > Bi3O4Cl > anatase TiO2, different from the order found under UV light illumination (Bi3O4Cl > anatase TiO2 > Bi4NbO8Cl). The dispersion of Pt over Bi4NbO8Cl leads to an obvious increase in photocatalytic performance, to about 1.5 times higher. The polarizing fields in NbO6 and BiO8 local structures, as well as the internal electrical fields between [Bi2O2] and [Cl] slabs, are considered to be useful for the efficient separation of electron–hole pairs upon photoexcitation.

Graphical abstract: Photocatalytic activity of a Bi-based oxychloride Bi4NbO8Cl

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Article information

https://doi.org/10.1039/B615903F
Submitted
01 Nov 2006
Accepted
06 Feb 2007
First published
09 Mar 2007
J. Mater. Chem., 2007,17, 2145-2150
Article type
Paper
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Photocatalytic activity of a Bi-based oxychloride Bi4NbO8Cl

X. Lin, T. Huang, F. Huang, W. Wang and J. Shi, J. Mater. Chem., 2007, 17, 2145
DOI: 10.1039/B615903F

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