Size-Dependent Visible Light Photocatalytic Performance of Cu2O Nanocubes

Karthikeyan, S, Kumar, S, Durndell, L, Isaacs, M, Parlett, C, Coulson, B, Douthwaite, R, Jiang, Z, Wilson, K and Lee, A 2018, 'Size-Dependent Visible Light Photocatalytic Performance of Cu2O Nanocubes', ChemCatChem, vol. 10, no. 16, pp. 3554-3563.


Document type: Journal Article
Collection: Journal Articles

Title Size-Dependent Visible Light Photocatalytic Performance of Cu2O Nanocubes
Author(s) Karthikeyan, S
Kumar, S
Durndell, L
Isaacs, M
Parlett, C
Coulson, B
Douthwaite, R
Jiang, Z
Wilson, K
Lee, A
Year 2018
Journal name ChemCatChem
Volume number 10
Issue number 16
Start page 3554
End page 3563
Total pages 10
Publisher Wiley
Abstract Well-defined Cu2O nanocubes with tunable dimensions and physicochemical properties have been prepared using a simple one-pot reaction. Reduction of Cu(II) salts by ascorbic acid in the presence of PEG as a structure-directing agent affords crystalline Cu2O nanocubes of between 50 to 500 nm. Optical band gap, band energies, charge-carrier lifetimes and surface oxidation state systematically evolve with nanocube size, and correlate well with visible light photocatalytic activity for aqueous phase phenol degradation and H-2 production which are both directly proportional to size (doubling between 50 and 500 nm). HPLC reveals fumaric acid as the primary organic product of phenol degradation, and selectivity increases with nanocube size at the expense of toxic catechol. Apparent quantum efficiencies reach 26% for phenol photodegradation and 1.2% for H-2 production using 500 nm Cu2O cubes.
Subject Catalysis and Mechanisms of Reactions
Keyword(s) Cu2O
hydrogen
nanocubes
phenol
photocatalysis
DOI - identifier 10.1002/cctc.201800439
Copyright notice © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN 1867-3880
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