Hematite doped magnetic TiO2 nanocomposites with improved photocatalytic activity

被引：27

作者：

Liu, Dan ^{[1
]}

Li, Ziheng ^{[1
]}

Wang, Wenquan ^{[1
]}

Wang, Guoqiang ^{[1
]}

Liu, Dan ^{[1
]}

机构：

[1] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 654卷

基金：

中国国家自然科学基金;

关键词：

Nanocomposites; Anatase TiO2; Photocatalytic; alpha-Fe2O3; Self-built electric field; FE2O3/TIO2; PHOTOCATALYST; HIERARCHICAL STRUCTURE; DEGRADATION; ALPHA-FE2O3; WATER; GROWTH;

D O I：

10.1016/j.jallcom.2015.09.140

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A facile approach for the fabrication of magnetic alpha-Fe2O3@TiO2 nanocomposites has been demonstrated. The obtained composites which were doped by proper amount of hematite exhibited better photocatalytic activity than the samples without alpha-Fe2O3 doping according to the photocatalytic degradation of methyl orange. Moreover, the photocatalytic degradation activity of these nanocomposites is better than P25 at the same photocatalytic experiment conditions. However, when the doping amount of hematite is high, the nanocomposites exhibit poor photocatalytic activity. Because of the self-built electric field formed in the heterojunction of alpha-Fe2O3 and TiO2, it can be confirmed that of the doping hematite makes a contribution to the ultraviolet-vis light absorption and provides more electrons for the catalysis process. And the combination of two kinds of semiconductor is the key to improve the utilization efficiency of light. Furthermore, that all the samples can be transferred easily by a magnet shows potential application for wastewater treatment. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：491 / 497

页数：7

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