TY - JOUR
T1 - Pompon Dahlia-like Cu2O/rGO Nanostructures for Visible Light Photocatalytic H2 Production and 4-Chlorophenol Degradation
AU - Karthikeyan, Sekar
AU - Ahmed, Kassam
AU - Osatiashtiani, Amin
AU - Lee, Adam F.
AU - Wilson, Karen
AU - Sasaki, Keiko
AU - Coulson, Ben
AU - Swansborough-Aston, Will
AU - Douthwaite, Richard E.
AU - Li, Wei
N1 - Funding Information:
We thank the Royal Society and Science and Engineering Research Board for the award of a Royal Society‐SERB “Newton International Fellowship (NF NF151399)” to S.K. We thank the Biotechnology and Biological Sciences Research Council (BBSRC; via grant BB/P022685/1). S. K. and K. S. would like to thank the Japan Society for the Promotion of Science (JSPS) for providing a postdoctoral fellowship for foreign researchers (P18387) and the research grant (KAKENHI JP18F18387).
Funding Information:
We thank the Royal Society and Science and Engineering Research Board for the award of a Royal Society-SERB ?Newton International Fellowship (NF NF151399)? to S.K. We thank the Biotechnology and Biological Sciences Research Council (BBSRC; via grant BB/P022685/1). S. K. and K. S. would like to thank the Japan Society for the Promotion of Science (JSPS) for providing a postdoctoral fellowship for foreign researchers (P18387) and the research grant (KAKENHI JP18F18387).
Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/3/19
Y1 - 2020/3/19
N2 - 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.
AB - 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.
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U2 - 10.1002/cctc.201902048
DO - 10.1002/cctc.201902048
M3 - Article
AN - SCOPUS:85078858044
SN - 1867-3880
VL - 12
SP - 1699
EP - 1709
JO - ChemCatChem
JF - ChemCatChem
IS - 6
ER -