Synthesis and photocatalytic activity of Ag-Ti-Si ternary modified α-Bi2O3 nanoporous spheres

被引：9

作者：

Dai, Yunrong ^{[1
,2
]}

Yin, Lifeng ^{[1
]}

机构：

[1] Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China

[2] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China

来源：

MATERIALS LETTERS | 2015年 / 142卷

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

Photocatalysis; Visible light; Modification; Semiconductors; Porous materials; Energy storage and conversion; VISIBLE-LIGHT;

D O I：

10.1016/j.matlet.2014.12.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ag-Ti-Si ternary modified alpha-Bi2O3 nanoporous spheres (TMBS) were prepared via a solvothermal method, and were characterized by SEM, XRD, N-2-sorption and DRS. The particle diameters of TMBS were 500-600 nm and the pore sizes were 20-30 nm. The band gap energy of TMBS was estimated to be 2.51-2.72 eV. TMBS exhibited high photocatalytic activity on the degradation of triclosan (TCS) under UV-light and visible light irradiation (> 420 nm). The optimized apparent rate of TCS by TMBS was 0.176 min(-1) under UV-light, five times that of TiO2 (P25). By electron spin resonance (ESR) trapping, the photocatalysis mechanism of TCS was ascribed to the photo-generated singlet oxygen (O-1(2)) or superoxide ion (O-2(-)). (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：225 / 228

页数：4

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