Preparation and photocatalytic properties of a visible light responsive and magnetically separated photocatalyst of γ-Fe2O3/SiO2/GSs/TiO2

被引：6
作者：
Chen, Deqiang [1 ]
Chen, Yiqun [1 ]
Li, Yang [1 ]
Ye, Shaonan [1 ]
机构：
[1] Hohai Univ, Coll Environm, Key Lab Integrated Regulat & Resource Dev Shallow, Minist Educ, Nanjing 210098, Jiangsu, Peoples R China
来源：
MICRO & NANO LETTERS | 2015年 / 10卷 / 05期
基金：
中国国家自然科学基金;
关键词：
HYDROGEN-PRODUCTION; HIGH-PERFORMANCE; OXIDE SHEETS; GRAPHENE; TIO2; COMPOSITE; DEGRADATION; FILMS; WATER; RECOMBINATION;
D O I：
10.1049/mnl.2014.0673
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A graphene sheet (GS) synthetised from natural graphite powder was doped in titanium dioxide (TiO2) through the sol-gel method to improve the photocatalytic activity and magnetic gamma-Fe2O3/SiO2 particles were added subsequently to improve recycling and reduce the waste of the catalyst. The morphology, microstructure, absorption spectrum and magnetic property of the gamma-Fe2O3/SiO2/GSs/TiO2 composites were characterised via X-ray diffraction, transmission electron microscopy, diffuse-reflectance spectra and a vibrating sample magnetometer, respectively. The result revealed that (i) the nanocrystalline structure of gamma-Fe2O3/SiO2/GSs/TiO2 composites is nearly unchanged compared with pure P25 nanoparticles; (ii) there was a redshift in the absorption edge of the photocatalyst composite; (iii) the photocatalyst composites displayed good superparamagnetism which was in favour of the reclamation of the catalyst; (iv) the adsorption and visible light photocatalytic activity of the composite is enhanced greatly on decomposition of methylene blue and (v) the photocatalysts maintained high photocatalytic activity after being reused several times.
引用
收藏
页码：267 / 271
页数：5
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