Karthikeyan, Sekar, Ahmed, Kassam, Osatiashtiani, Amin et al. (7 more authors) (2020) Pompon Dahlia-like Cu2O/rGO Nanostructures for Visible Light Photocatalytic H2 Production and 4-Chlorophenol Degradation. ChemCatChem. ISSN 1867-3899
Abstract
Hierarchical Cu2O nanospheres with a Pompon Dahlia-like morphology were prepared by a one-pot synthesis employing electrostatic self-assembly. Nanocomposite analogues were also prepared in the presence of reduced graphene oxide (rGO). Photophysical properties of the hierarchical Cu2O nanospheres and Cu2O/rGO nanocomposite were determined, and their photocatalytic applications evaluated for photocatalytic 4-chlorophenol (4-CP) degradation and H2 production. Introduction of trace (<1 wt %) rGO improves the apparent quantum efficiency (AQE) at 475 nm of hierarchical Cu2O for H2 production from 2.23 % to 3.35 %, giving an increase of evolution rate from 234 μmol.g−1.h−1 to 352 μmol.g−1.h−1 respectively. The AQE for 4-CP degradation also increases from 52 % to 59 %, with the removal efficiency reaching 95 % of 10 ppm 4-CP within 1 h. Superior performance of the hierarchical Cu2O/rGO nanocomposite is attributable to increased visible light absorption, reflected in a greater photocurrent density. Excellent catalyst photostability for >6 h continuous reaction is observed.
Metadata
Authors/Creators: |
|
---|---|
Copyright, Publisher and Additional Information: | © 2019 Wiley-VCH Verlag GmbH& Co. KGaA, Weinheim. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Keywords: | 4-chlorophenol, CuO, hydrogen, photocatalysis, reduced graphene oxide |
Dates: |
|
Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) The University of York > Faculty of Sciences (York) > Electronic Engineering (York) |
Depositing User: | Pure (York) |
Date Deposited: | 14 Feb 2020 10:20 |
Last Modified: | 06 Dec 2023 13:33 |
Published Version: | https://doi.org/10.1002/cctc.201902048 |
Status: | Published online |
Refereed: | Yes |
Identification Number: | https://doi.org/10.1002/cctc.201902048 |
Related URLs: |
Download
Filename: Author_accepted_manuscript.pdf
Description: Author accepted manuscript