High Photocatalytic Activity of Fe3O4-SiO2-TiO2 Functional Particles with Core-Shell Structure
This paper describes a novel method of synthesizing Fe3O4-SiO2-TiO2 functional nanoparticles with the core-shell structure. The Fe3O4 cores which were mainly superparamagnetic were synthesized through a novel carbon reduction method. The Fe3O4 cores were then modified with SiO2 and finally encapsula...
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Series: | Journal of Nanomaterials |
Online Access: | http://dx.doi.org/10.1155/2013/762423 |
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doaj-5672a47c1eba4f1da5e88d2606ec367f2020-11-24T22:52:41ZengHindawi LimitedJournal of Nanomaterials1687-41101687-41292013-01-01201310.1155/2013/762423762423High Photocatalytic Activity of Fe3O4-SiO2-TiO2 Functional Particles with Core-Shell StructureChenyang Xue0Qiang Zhang1Junyang Li2Xiujian Chou3Wendong Zhang4Hua Ye5Zhanfeng Cui6Peter J. Dobson7Key Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, No.3 Xueyuan Road, Taiyuan, Shanxi 030051, ChinaKey Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, No.3 Xueyuan Road, Taiyuan, Shanxi 030051, ChinaKey Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, No.3 Xueyuan Road, Taiyuan, Shanxi 030051, ChinaKey Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, No.3 Xueyuan Road, Taiyuan, Shanxi 030051, ChinaKey Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, No.3 Xueyuan Road, Taiyuan, Shanxi 030051, ChinaInstitute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX12JD, UKInstitute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX12JD, UKInstitute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford OX12JD, UKThis paper describes a novel method of synthesizing Fe3O4-SiO2-TiO2 functional nanoparticles with the core-shell structure. The Fe3O4 cores which were mainly superparamagnetic were synthesized through a novel carbon reduction method. The Fe3O4 cores were then modified with SiO2 and finally encapsulated with TiO2 by the sol-gel method. The results of characterizations showed that the encapsulated 700 nm Fe3O4-SiO2-TiO2 particles have a relatively uniform size distribution, an anatase TiO2 shell, and suitable magnetic properties for allowing collection in a magnetic field. These magnetic properties, large area, relative high saturation intensity, and low retentive magnetism make the particles have high dispersibility in suspension and yet enable them to be recovered well using magnetic fields. The functionality of these particles was tested by measuring the photocatalytic activity of the decolouring of methyl orange (MO) and methylene blue (MB) under ultraviolet light and sunlight. The results showed that the introduction of the Fe3O4-SiO2-TiO2 functional nanoparticles significantly increased the decoloration rate so that an MO solution at a concentration of 10 mg/L could be decoloured completely within 180 minutes. The particles were recovered after utilization, washing, and drying and the primary recovery ratio was 87.5%.http://dx.doi.org/10.1155/2013/762423 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chenyang Xue Qiang Zhang Junyang Li Xiujian Chou Wendong Zhang Hua Ye Zhanfeng Cui Peter J. Dobson |
spellingShingle |
Chenyang Xue Qiang Zhang Junyang Li Xiujian Chou Wendong Zhang Hua Ye Zhanfeng Cui Peter J. Dobson High Photocatalytic Activity of Fe3O4-SiO2-TiO2 Functional Particles with Core-Shell Structure Journal of Nanomaterials |
author_facet |
Chenyang Xue Qiang Zhang Junyang Li Xiujian Chou Wendong Zhang Hua Ye Zhanfeng Cui Peter J. Dobson |
author_sort |
Chenyang Xue |
title |
High Photocatalytic Activity of Fe3O4-SiO2-TiO2 Functional Particles with Core-Shell Structure |
title_short |
High Photocatalytic Activity of Fe3O4-SiO2-TiO2 Functional Particles with Core-Shell Structure |
title_full |
High Photocatalytic Activity of Fe3O4-SiO2-TiO2 Functional Particles with Core-Shell Structure |
title_fullStr |
High Photocatalytic Activity of Fe3O4-SiO2-TiO2 Functional Particles with Core-Shell Structure |
title_full_unstemmed |
High Photocatalytic Activity of Fe3O4-SiO2-TiO2 Functional Particles with Core-Shell Structure |
title_sort |
high photocatalytic activity of fe3o4-sio2-tio2 functional particles with core-shell structure |
publisher |
Hindawi Limited |
series |
Journal of Nanomaterials |
issn |
1687-4110 1687-4129 |
publishDate |
2013-01-01 |
description |
This paper describes a novel method of synthesizing Fe3O4-SiO2-TiO2 functional nanoparticles with the core-shell structure. The Fe3O4 cores which were mainly superparamagnetic were synthesized through a novel carbon reduction method. The Fe3O4 cores were then modified with SiO2 and finally encapsulated with TiO2 by the sol-gel method. The results of characterizations showed that the encapsulated 700 nm Fe3O4-SiO2-TiO2 particles have a relatively uniform size distribution, an anatase TiO2 shell, and suitable magnetic properties for allowing collection in a magnetic field. These magnetic properties, large area, relative high saturation intensity, and low retentive magnetism make the particles have high dispersibility in suspension and yet enable them to be recovered well using magnetic fields. The functionality of these particles was tested by measuring the photocatalytic activity of the decolouring of methyl orange (MO) and methylene blue (MB) under ultraviolet light and sunlight. The results showed that the introduction of the Fe3O4-SiO2-TiO2 functional nanoparticles significantly increased the decoloration rate so that an MO solution at a concentration of 10 mg/L could be decoloured completely within 180 minutes. The particles were recovered after utilization, washing, and drying and the primary recovery ratio was 87.5%. |
url |
http://dx.doi.org/10.1155/2013/762423 |
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