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Novel Magnetically Separable Fe3O4-WSe2/NG Photocatalyst: Synthesis and Photocatalytic Performance under Visible-light Irradiation

Abstract

Visible light responsive Fe3O4-WSe2/NG (Nitrogen doped graphene oxide) heterojunction nanocomposites were synthesized by a hydrothermal synthesis route, in which Fe3O4 and WSe2 particles were coated on the surface of NG. The samples were characterized by XRD, SEM, TEM, XPS, VSM, UV–vis DRS, TOC, GC-MS techniques. The results showed that the photocatalytic activity of Fe3O4-WSe2/NG photocatalysts under visible-light illumination was higher than that of WSe2/NG owing to the narrow band gap energy and delayed electron-hole recombination, and Fe3O4 can be used for the advanced oxidation processes (AOPs) to degrade organic pollutants at pH 3 and H2O2 3.0mM. Moreover, the mass fraction of Fe3O4 had a great effect on the photocatalytic activity of Fe3O4-WSe2/NG. Among the hybrid photocatalysts, 30 wt%Fe3O4-WSe2/NG (30 wt% of Fe3O4) exhibited the highest photocatalytic activity with a rate constant of 0.05589 min-1 for the degradation of the MB in aqueous solution under visible light irradiation, and the removal efficiency reached 98.8% which was 1.6 times higher than that of WSe2/NG. More importantly, the magnetic properties of 30 wt%Fe3O4-WSe2/NG were measured and its reusability was also investigated after four successive runs applying an external magnetic field.

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Publication details

The article was received on 24 Jan 2018, accepted on 29 Mar 2018 and first published on 03 Apr 2018


Article type: Paper
DOI: 10.1039/C8NJ00406D
Citation: New J. Chem., 2018, Accepted Manuscript
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    Novel Magnetically Separable Fe3O4-WSe2/NG Photocatalyst: Synthesis and Photocatalytic Performance under Visible-light Irradiation

    B. An, Y. Liu, C. Xu, H. Wang and J. Wan, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ00406D

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