Issue 11, 2018

Novel magnetically separable Fe3O4–WSe2/NG photocatalysts: 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, 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

Article information

Article type
Paper
Submitted
24 Jan 2018
Accepted
29 Mar 2018
First published
03 Apr 2018

New J. Chem., 2018,42, 8914-8923

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

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements