Preparation, characterization and activity evaluation of p-n junction photocatalyst p-CaFe2O4/n-Ag3VO4 under visible light irradiation

被引：108

作者：

Shifu, Chen ^{[1
]}

Wei, Zhao ^{[1
]}

Wei, Liu ^{[1
]}

Huaye, Zhang ^{[1
]}

Xiaoling, Yu ^{[1
]}

Yinghao, Chen ^{[2
]}

机构：

[1] Huaibei Coal Normal Coll, Dept Chem, Huaibei 235000, Anhui, Peoples R China

[2] China Univ Geosci, Sch Ocean Sci, Beijing 100083, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 172卷 / 2-3期

关键词：

p-CaFe2O4/n-Ag3VO4; p-n junction; Photocatalyst; Ball milling; Characterization; POLYCRYSTALLINE ZNO/TIO2 SYSTEMS; EFFICIENT DEGRADATION; HYDROGEN-PRODUCTION; SPRAY-PYROLYSIS; THIN-FILMS; DOPED TIO2; PHOTODEGRADATION; COMPOSITE; SURFACE; WATER;

D O I：

10.1016/j.jhazmat.2009.08.007

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

p-n junction photocatalyst p-CaFe2O4/n-Ag3VO4 was prepared by ball milling Ag3VO4 in H2O doped with p-type CaFe2O4. The structural and optical properties of the photocatalyst were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and UV-vis diffuse reflection spectrum (DRS). The photocatalytic activity was evaluated by photocatalytic degradation of methylene blue (MB) under visible light irradiation. The results showed that the photocatalytic activity of the p-CaFe2O4/n-Ag3VO4 was higher than that of Ag3VO4. When the amount of doped p-CaFe2O4 was 2.0wt.% and the p-CaFe2O4/n-Ag3VO4 was ball milled for 12h. the photocatalytic degradation efficiency was 85.4%. Effect of ball milling time on the photocatalytic activity of the photocatalyst was also investigated. The mechanisms of the increase in the photocatalytic activity were discussed by the p-n junction principle. (C) 2009 Published by Elsevier B.V.

引用

页码：1415 / 1423

页数：9

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