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Issue 12, 2015
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Reduced graphene oxide anchored magnetic ZnFe2O4 nanoparticles with enhanced visible-light photocatalytic activity

Shouliang Wu,a  Panpan Wang,a  Yunyu Cai,a  Dewei Liang,a  Yixing Ye,a  Zhenfei Tian,a  Jun Liua  and  Changhao Liang*a 
Author affiliations

* Corresponding authors

a Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, P. R. China
E-mail: chliang@issp.ac.cn
Fax: +86-551-65591434
Tel: +86-551-65591129

Abstract

We report a facile approach to immobilize magnetic ZnFe2O4 nanoparticles (NPs) onto a reduced grapheme oxide (rGO) network by using highly reactive ZnOx(OH)y and FeOx colloids as precursors, which were respectively obtained by laser ablation of metallic zinc (Zn) and iron (Fe) targets in pure water. A microstructure investigation of such nanocomposites (NCs) revealed that ZnFe2O4 NPs are well-dispersed onto rGO sheets. Such a structure was helpful for separating the photoexcited electron–hole pairs and accelerating the electrons transfer. Electrochemical impedance measurements indicated the remarkable decrease of the interfacial layer resistance of the composite structure compared to that of pure ZnFe2O4 NPs. As a result of these advantages, such NCs present a prominent enhancement in the photodegradation efficiency for methylene blue dye. Besides, the excellent magnetic properties of the ZnFe2O4 NPs allow the catalysts to be easily separated from the solution by a magnet for recycling. This effort not only provided a new approach to fabricate ZnFe2O4–rGO NCs, also expanded the application of ZnFe2O4 NPs used as visible-light excited photocatalysts in application of organic pollutants degradation.

Graphical abstract: Reduced graphene oxide anchored magnetic ZnFe2O4 nanoparticles with enhanced visible-light photocatalytic activity

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Publication details

The article was received on 15 Nov 2014, accepted on 22 Dec 2014 and first published on 22 Dec 2014


Article type: Paper
DOI: 10.1039/C4RA14587A
Author version available: Download Author version (PDF)
Citation: RSC Adv., 2015,5, 9069-9074
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    Reduced graphene oxide anchored magnetic ZnFe2O4 nanoparticles with enhanced visible-light photocatalytic activity

    S. Wu, P. Wang, Y. Cai, D. Liang, Y. Ye, Z. Tian, J. Liu and C. Liang, RSC Adv., 2015, 5, 9069
    DOI: 10.1039/C4RA14587A

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