Efficient removal of organic contaminants by a visible light driven photocatalyst Sr6Bi2O9

被引：121

作者：

Yang, Yanqing ^{[1
]}

Zhang, Gaoke ^{[1
]}

Yu, Shujie ^{[1
]}

Shen, Xiong ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Hubei Key Lab Mineral Resources Proc & Environm, Wuhan 430070, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2010年 / 162卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Sr6Bi2O9; Bismuth; Sol-gel method; 4BS; Visible light; Photocatalytic activity; ABSOLUTE RAMAN INTENSITIES; PHOTOPHYSICAL PROPERTIES; SOLID PHOTOCATALYSTS; TITANIUM-DIOXIDE; BISMUTH TITANATE; NANOSIZED BI2WO6; ORANGE-II; DEGRADATION; IRRADIATION; TIO2;

D O I：

10.1016/j.cej.2010.05.024

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Sr6Bi2O9 powders were synthesized by a sal-gel method using Bi(NO3)(3)center dot 5H(2)O and Sr(NO3)(2) as the starting materials and were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectrum (UV-vis DRS), Fourier transform infrared (FT-IR) spectrum and Raman spectrum. The as-prepared Sr6Bi2O9 powders showed an efficient photocatalytic activity in the decomposition of 4BS dye (a widely used azo dye) and 4-nitrophenol (4-NP, a priority pollutant) under visible light irradiation (A > 400 nm). TA-PL analysis reveals that HO center dot was not the dominant photooxidant. The radical scavengers experiments indicated that the main active species was O-2 in the photocatalytic degradation of dye under visible irradiation. A possible photodegradation mechanism of organic pollutants by the visible light driven Sr6Bi2O9 was discussed. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：171 / 177

页数：7

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