Visible-light photocatalytic activity of the metastable Bi20TiO32 synthesized by a high-temperature quenching method

被引：86

作者：

Cheng, Hefeng ^{[1
]}

Huang, Baibiao ^{[1
]}

Dai, Ying ^{[2
]}

Qin, Xiaoyan ^{[1
]}

Zhang, Xiaoyang ^{[1
]}

Wang, Zeyan ^{[1
]}

Jiang, Minhua ^{[1
]}

机构：

[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[2] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2009年 / 182卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Metastable phase; Bi20TiO32; Quenching; Photocatalytic activity; BISMUTH TITANATE; STABLE PHOTOCATALYST; HYDROTHERMAL SYNTHESIS; DIELECTRIC-PROPERTIES; BI2TI2O7; CERAMICS; IRRADIATION; EFFICIENT; PROPERTY; PHASE; WATER;

D O I：

10.1016/j.jssc.2009.06.006

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Metastable Bi20TiO32 samples were synthesized by a high-temperature quenching method using alpha-Bi2O3 and anatase TiO2 as raw materials. The photocatalytic activity of the as-prepared samples was measured with the photodegradation of methyl orange at room temperature under visible light irradiation. The Bi20TiO32 samples exhibited good absorption in the visible light region with a band gap of about 2.38eV and the band structure of Bi20TiO32 was Studied. Photodegradation against methyl orange was much better than alpha-Bi2O3 prepared by the same way. The photocatalytic activity of Bi20TiO32 samples is supposed to be associated with the hybridized Bi 6s and O 2p orbitals. In addition, the dispersive characteristic of Bi 6s orbital in the hybridized valence band facilitates the mobility of the photogenerated carriers and hampers their recombination. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：2274 / 2278

页数：5

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