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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

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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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Publication details

The article was received on 10 Mar 2011, accepted on 27 Apr 2011 and first published on 06 Jun 2011


Article type: Paper
DOI: 10.1039/C1DT10399G
Dalton Trans., 2011,40, 6906-6911

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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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