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Issue 11, 2018
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Novel magnetically separable Fe3O4–WSe2/NG photocatalysts: synthesis and photocatalytic performance under visible-light irradiation

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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, and 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 in advanced oxidation processes (AOPs) to degrade organic pollutants at pH 3 and 3.0 mM H2O2. 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 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 analyzed and its reusability was also investigated after four successive runs by applying an external magnetic field.

Graphical abstract: Novel magnetically separable Fe3O4–WSe2/NG photocatalysts: synthesis and photocatalytic performance under visible-light irradiation

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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., 2018,42, 8914-8923
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    Novel magnetically separable Fe3O4–WSe2/NG photocatalysts: synthesis and photocatalytic performance under visible-light irradiation

    B. An, Y. Liu, C. Xu, H. Wang and J. Wan, New J. Chem., 2018, 42, 8914
    DOI: 10.1039/C8NJ00406D

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