Issue 118, 2015

Synthesis of Ag2CO3/Bi2WO6 heterojunctions with enhanced photocatalytic activity and cycling stability

Abstract

Hierarchical Bi2WO6 nanoarchitectures with a size of 2–3 μm were prepared via a facile microwave-assisted solution-phase reaction process. Monodisperse spherical Ag2CO3 nanoparticles with an average size of about 10 nm were deposited onto the surface of the Bi2WO6 nanoarchitectures to form a novel Ag2CO3/Bi2WO6 heterojunction structure through a facile in situ precipitation–deposition method. The obtained samples were characterized using XRD, XPS, SEM, TEM (HRTEM), UV-vis DRS and nitrogen adsorption–desorption techniques. The photocatalytic evaluation demonstrates that the decoration with Ag2CO3 nanoparticles significantly enhances the photocatalytic activity of Bi2WO6 and the photocatalytic performance is greatly influenced by the content of deposited Ag2CO3. The 30 wt% Ag2CO3-loaded Bi2WO6 sample exhibited the highest photocatalytic activity for the degradation of rhodamine B (RhB) under visible light irradiation. Meanwhile, it also possesses excellent cycling stability and superior photocatalytic performance toward other pollutants. The dramatically enhanced photocatalytic activity and stability can be mainly ascribed to well-matched energy bands and heterojunctions between Ag2CO3 and Bi2WO6, which can effectively improve the separation of photo-induced electron–hole pairs at the heterojunction interfaces.

Graphical abstract: Synthesis of Ag2CO3/Bi2WO6 heterojunctions with enhanced photocatalytic activity and cycling stability

Supplementary files

Article information

Article type
Paper
Submitted
15 Sep 2015
Accepted
23 Oct 2015
First published
23 Oct 2015

RSC Adv., 2015,5, 97195-97204

Author version available

Synthesis of Ag2CO3/Bi2WO6 heterojunctions with enhanced photocatalytic activity and cycling stability

J. Bao, S. Guo, J. Gao, T. Hu, L. Yang, C. Liu, J. Peng and C. Jiang, RSC Adv., 2015, 5, 97195 DOI: 10.1039/C5RA18938A

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