Mechanism of photocatalytic activity improvement of AgNPs/TiO2 by oxygen plasma irradiationElectronic supplementary information (ESI) available. See DOI: 10.1039/c6nr04862e

Plasmonic metal Ag nanoparticles (AgNPs) on TiO 2 thin films (AgNPs/TiO 2 ) are a kind of excellent photocatalyst of high efficiency under visible light, and thus draw great interest nowadays. Further improvement of their photocatalytic activity (PA) is difficult but is of high importance for their...

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Bibliographic Details
Main Authors Fang, Yingcui, Zhang, Bing, Hong, Liu, Zhang, Kang, Li, Gongpu, Jiang, Jun, Yan, Rong, Chen, Junling
Format Journal Article
Published 29.09.2016
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Summary:Plasmonic metal Ag nanoparticles (AgNPs) on TiO 2 thin films (AgNPs/TiO 2 ) are a kind of excellent photocatalyst of high efficiency under visible light, and thus draw great interest nowadays. Further improvement of their photocatalytic activity (PA) is difficult but is of high importance for their applications. In this paper, oxygen plasma was taken to partially oxidize AgNPs deposited on the surface of TiO 2 to form a structure with the configuration of a p-type semiconductor/plasmonic metal/n-type semiconductor (Ag 2 O/AgNPs/TiO 2 ). The localized surface plasmon resonance (LSPR) of the AgNPs was strongly damped after oxygen plasma irradiation (OPI) but the photocatalytic activity was improved. The mechanisms of the photocatalytic activity improvement under UV and visible light were explored based on charge kinetics. The LSPR damping of AgNPs on TiO 2 by Ag 2 O formed during oxygen plasma irradiation improves the photocatalytic activity.
Bibliography:10.1039/c6nr04862e
Electronic supplementary information (ESI) available. See DOI
ISSN:2040-3364
2040-3372
DOI:10.1039/c6nr04862e