Excellent visible-light photocatalytic activity of p-type Ag2O coated n-type Fe2O3 microspheres

被引：30
作者：
Li, Shijie [1 ,2 ]
Hu, Shiwei [1 ]
Xu, Kaibing [4 ]
Jiang, Wei [1 ,2 ]
Hu, Junqing [5 ]
Liu, Jianshe [3 ]
机构：
[1] Zhejiang Ocean Univ, Innovat & Applicat Inst, Zhoushan 316022, Zhejiang, Peoples R China
[2] Zhoushan Municipal Ctr Dis Control & Prevent, Zhejiang Prov Key Lab Hlth Risk Factors Seafood, Zhoushan 316021, Peoples R China
[3] Donghua Univ, Coll Environm Sci & Engn, State Environm Protect Engn Ctr Pollut Treatment, Shanghai 201620, Peoples R China
[4] Donghua Univ, Res Ctr Anal & Measurement, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China
[5] Donghua Univ, Coll Mat Sci & Engn, Shanghai 201620, Peoples R China
来源：
MATERIALS LETTERS | 2017年 / 188卷
基金：
中国国家自然科学基金;
关键词：
Ag2O/Fe2O3; P-n Heterojunction; Visible light; Nanocomposites; Photocatalysis; Semiconductors; NANOSTRUCTURES; COMPOSITE;
D O I：
10.1016/j.matlet.2016.11.106
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ag2O/Fe2O3 p-n heterojunctions composed of flower-like Fe(2)o(3) and Ag2O nanoparticles have been prepared via a solvothermal precipitation-deposition method. They display higher photocatalytic activities than pure Fe2O3 for the degradation of RhB under visible-light irradiation. Among them, the Ag2O/Fe2O3 heterojunction with the Ag/Fe molar ratio of 0.2/1 (0.2Ag-Fe) exhibits the highest activity and good stability. It was even more active than the mechanical mixture (22.5 wt% Ag2O +77.5 wt% Fe2O3), The superior photocatalytic activity of Ag2O/Fe2O3 heterojunction can be ascribed to p-n heterojunction between Ag2O and Fe2O3, facilitating the efficient separation of photogenerated charge carriers. The photogenerated holes and superoxide radical anions mainly account for the RhB degradation. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：368 / 371
页数：4
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