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Visible light active photocatalysis on block copolymer induced strings of ZnO nanoparticles doped with carbon

Title
Visible light active photocatalysis on block copolymer induced strings of ZnO nanoparticles doped with carbon
Authors
Kochuveedu S.T.Jang Y.H.Jang Y.J.Kim D.H.
Ewha Authors
김동하
SCOPUS Author ID
김동하scopus
Issue Date
2013
Journal Title
Journal of Materials Chemistry A
ISSN
2050-7488JCR Link
Citation
vol. 1, no. 3, pp. 898 - 905
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We report a facile route for the fabrication of a unique configuration of carbon-doped strings of ZnO nanoparticles obtained by subjecting solvent vapor annealing followed by direct carbonization to reconstructed block copolymer inverse micelle arrays. The dual role of a carbon (C) moiety has been exploited in significantly enhancing the catalytic performance of C-ZnO nanohybrids under the illumination of visible light. The first role is to create a new energy level above the valence band of ZnO and the other is to act as a channel by which recombination of the excitons is effectively suppressed. The enhanced visible light active photocatalytic efficiency and recyclability of C-ZnO was demonstrated in terms of degradation of a target dye (p-nitrophenol) molecule. Photoelectrochemical water splitting was also performed using C-ZnO on ITO as the working electrode. A significant enhancement in the photocurrent density was obtained for C-ZnO compared with bare ZnO. A plausible mechanism to support the enhanced visible light activity of C-ZnO was proposed. This journal is © 2013 The Royal Society of Chemistry.
DOI
10.1039/c2ta00263a
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자연과학대학 > 화학·나노과학전공 > Journal papers
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