Enhanced photo-Fenton degradation of tetracycline using TiO2-coated α-Fe2O3 core-shell heterojunction

被引：75
作者：
Zheng, Xiaogang [1 ]
Fu, Wendi [1 ]
Kang, Fuyan [1 ]
Peng, Hao [2 ]
Wen, Jing [3 ]
机构：
[1] Neijiang Normal Univ, Coll Chem & Chem Engn, Neijiang 641100, Sichuan, Peoples R China
[2] Yangtz Normal Univ, Coll Chem & Chem Engn, Chongqing 408100, Peoples R China
[3] Chinese Acad Sci, Qjnghai Inst Salt Lakes, Key Lab Salt Lake Resources Chem Qinghai Prov, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Qinghai, Peoples R China
来源：
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2018年 / 68卷
基金：
中国国家自然科学基金;
关键词：
Cubic alpha-Fe2O3; TiO2; coating; Well-matched interface; Photo-Fenton degradation; Tetracycline; PHOTOCATALYTIC ACTIVITY; METHYLENE-BLUE; LIGHT; PERFORMANCE; CARBON; PHOTODEGRADATION; NANOCOMPOSITES; FACETS; BIODEGRADATION; NANOSTRUCTURES;
D O I：
10.1016/j.jiec.2018.07.024
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
TiO2-coated cubic alpha-Fe2O3 with mostly exposed (012) and (101) facets (alpha-Fe2O3@TiO2) was fabricated using a hydrothermal route for the photo-Fenton degradation of tetracycline under visible light irradiation. TiO2 coating could greatly affect the photocatalytic activity of alpha-Fe2O3@TiO2. Compared with cubic alpha-Fe2O3 alone for photodegradation of tetracycline, alpha-Fe2O3@TiO2 with TiO2 shell of around 15 nm exhibited higher removal efficiency of tetracycline in photo-Fenton system, and its durability was slightly affected after five cycle times under same conditions. It is ascribed to the well-matched interface between cubic alpha-Fe2O3 core and TiO2 shell, leading to the broadened light-absorption and the efficient separation of photo-generated electon-hole pairs. The (OH)-O-center dot radicals were main responsible for the advanced photocatalytic performance of alpha-Fe2O3@TiO2 in visible-light driven degradation of tetracycline. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：14 / 23
页数：10
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