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Issue 26, 2011
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Quasi-linear dependence of cation filling on the photocatalysis of AxBO3-based tunnel compounds†

Jianjun Wu,ab   Fuqiang Huang,*ab   Zhichao Shana  and  Yaoming Wang*ab  
Author affiliations

* Corresponding authors

a State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, P. R. China
E-mail: huangfq@mail.sic.ac.cn
Fax: +86 21 5241 6360
Tel: +86 21 5241 6360

b College of Chemistry and Molecular Engineering, Peking University, Beijing, P.R. China

Abstract

A series of AxBO3-based oxides, (A1)4(A2)2(A3)4Nb10O30 (A1 = Sr, Ba; A2 = Na, K; A3 = □) as deficient perovskites, ATiO3 (A = Mg, Ca, Sr, Ba) as ideal perovskites are prepared by solid-state reaction method, and investigated as novel tunnel photocatalysts. The efficiency exhibits a high dependence on the cation filling in the respective tunnels of these compounds. Generally, lower cation filling contributes to a higher activity. The cation filling is rationalized by the crystal packing factor (PF), the photocatalytic efficiency decreases quasi-linearly with PF. Moreover, the linear correlation also exists in the literature involving tunnel photocatalysts of Bi2RNbO7 (R = Y, rare earth element), MIn2O4 (M = Ca, Sr, Ba), ATaO3 (A = Li, Na, K), etc. Such linear correlation of photocatalysis with the crystal structure has not been reported in the literature. The study of structure-modification by controlling cation-filling for improving activity sheds light on the mechanism of photocatalysis and on developing new high-performance photocatalysts.

Graphical abstract: Quasi-linear dependence of cation filling on the photocatalysis of AxBO3-based tunnel compounds

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Article information

https://doi.org/10.1039/C1DT10399G
Submitted
10 Mar 2011
Accepted
27 Apr 2011
First published
06 Jun 2011
Dalton Trans., 2011,40, 6906-6911
Article type
Paper
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Quasi-linear dependence of cation filling on the photocatalysis of AxBO3-based tunnel compounds

J. Wu, F. Huang, Z. Shan and Y. Wang, Dalton Trans., 2011, 40, 6906
DOI: 10.1039/C1DT10399G

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