Issue 4, 2017

Novel β-Ag2MoO4/g-C3N4 heterojunction catalysts with highly enhanced visible-light-driven photocatalytic activity

Abstract

The kernel of photocatalysis research is the development of catalysts with remarkable photocatalytic activity. g-C3N4 has attracted much interest as a new and promising photocatalyst, but further modification and improvement of g-C3N4 is urgently needed. Herein, we report a novel β-Ag2MoO4/g-C3N4 heterojunction system with highly enhanced visible-light-driven photocatalytic activity. β-Ag2MoO4 nanoparticles were in situ loaded onto thin g-C3N4 nanosheets to make these heterojunction photocatalysts. The photocatalytic activities of these heterojunctions and the relevant samples were investigated by degrading Rhodamine B (RhB), methylene blue (MB), and methyl orange (MO) under visible light irradiation (λ > 400 nm). β-Ag2MoO4/g-C3N4 heterojunctions were found to be much more active than pristine β-Ag2MoO4, g-C3N4, or a mechanical mixture of both in the degradation of organic pollutants. The optimal catalyst had a β-Ag2MoO4/g-C3N4 mass ratio of 37.5%. Through relevant characterization, the upgraded photocatalytic activities of the β-Ag2MoO4/g-C3N4 heterojunctions were mainly attributed to the efficient separation of photogenerated charge carries. Superoxide radical anions (˙O2) and photogenerated holes (h+) were found to be the main active species.

Graphical abstract: Novel β-Ag2MoO4/g-C3N4 heterojunction catalysts with highly enhanced visible-light-driven photocatalytic activity

Supplementary files

Article information

Article type
Paper
Submitted
05 nov 2016
Accepted
01 dec 2016
First published
12 jan 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 2163-2171

Novel β-Ag2MoO4/g-C3N4 heterojunction catalysts with highly enhanced visible-light-driven photocatalytic activity

J. Zhang and Z. Ma, RSC Adv., 2017, 7, 2163 DOI: 10.1039/C6RA26352F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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