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Defect controlled water splitting characteristics of gold nanoparticle functionalized ZnO nanowire films

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Title Defect controlled water splitting characteristics of gold nanoparticle functionalized ZnO nanowire films
 
Creator KUSHWAHA, A
ASLAM, M
 
Subject SURFACE-PLASMON RESONANCE
ARRAY THIN-FILM
HYDROGEN GENERATION
METAL NANOPARTICLES
SOLAR-CELLS
ENHANCEMENT
STABILITY
PHOTOELECTRODES
NANOSTRUCTURES
PERFORMANCE
 
Description Functionalization of ZnO nanowires by size controlled gold nanoparticles is demonstrated through sputtering of a gold layer followed by annealing at different temperature. Rationally designed sputtered Au nanoparticle-ZnO nanowire (AuNP-ZnO) exhibits high photocatalytic activity for water splitting. The tailored structure shows an enhanced photocurrent of 300 mu A cm(-2) under visible light illumination. Additionally, the efficiency of 0.13% at a low bias of 0.45 V vs. Ag-AgCl indicates an efficient charge separation and collection without a conducting ITO/FTO base. The AuNPs tune the visible light absorption and utilize the SPR of the Au nanoparticle to boost the hot electron injection from Au nanoparticles to the ZnO conduction band. Moreover, AuNPs also assist in the suppression of surface defects of ZnO NWs (or hole traps) significantly and enhance the water splitting performance of the material under visible light.
 
Publisher ROYAL SOC CHEMISTRY
 
Date 2014-12-29T06:07:24Z
2014-12-29T06:07:24Z
2014
 
Type Article
 
Identifier RSC ADVANCES, 4(40)20955-20963
2046-2069
http://dx.doi.org/10.1039/c4ra00782d
http://dspace.library.iitb.ac.in/jspui/handle/100/17270
 
Language English