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Preparation of magnetic and photocatalytic cenosphere deposited with Fe3O4/SiO2/Eu-doped TiO2 core/shell nanoparticles

Published online by Cambridge University Press:  24 November 2015

Hui Zhang ,
Junli Zhang ,
Runjun Sun  and
Yingxue Zhou
Hui Zhang*
Affiliation:
School of Textile & Materials, Xi'an Polytechnic University, Xi'an 710048, Shaanxi Province, China
Junli Zhang*
Affiliation:
School of Textile & Materials, Xi'an Polytechnic University, Xi'an 710048, Shaanxi Province, China
Runjun Sun
Affiliation:
School of Textile & Materials, Xi'an Polytechnic University, Xi'an 710048, Shaanxi Province, China
Yingxue Zhou
Affiliation:
School of Textile & Materials, Xi'an Polytechnic University, Xi'an 710048, Shaanxi Province, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

To obtain a floating and magnetically recyclable photocatalyst, nano-scaled Fe3O4 particles are first deposited on the surface of the KH-550 modified cenosphere under a hydrothermal condition. The Fe3O4 coated cenosphere is then loaded with a layer of globular-flower-like SiO2 particles by a precipitation method. The Fe3O4/SiO2 double-layer structured cenosphere is finally immobilized with TiO2 nanoparticles doped with rare earth element Eu3+ to enhance the photoactivity of TiO2 using titanium sulfate, urea, and polyvinylpyrrolidone by a hydrothermal treatment. The as-prepared cenosphere is systematically characterized by various characterization techniques. The properties of photocatalytic degradation of methylene blue dye are also investigated. Results show that after being doped with 0.1% Eu3+ ions in relation to Ti4+ ions, the photocatalytic degradation efficiency for the Fe3O4/SiO2/Eu-doped TiO2 coated cenosphere is significantly improved under both ultraviolet and visible light irradiations. The saturation magnetization of the Fe3O4/SiO2/Eu-doped TiO2 coated cenosphere increases to some degree.

Keywords

cenospheremagneticphotocatalyticcore/shell structureEu-doping
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 23 , 14 December 2015 , pp. 3700 - 3709
Copyright
Copyright © Materials Research Society 2015 

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