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Oxidation Ability of Plasmon‐Induced Charge Separation Evaluated on the Basis of Surface Hydroxylation of Gold Nanoparticles
Author(s) -
Nishi Hiroyasu,
Tatsuma Tetsu
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201605914
Subject(s) - plasmon , hydroxylation , nanoparticle , photocatalysis , photochemistry , redox , electrolyte , chemistry , colloidal gold , irradiation , surface plasmon , surface plasmon resonance , surface charge , photoinduced charge separation , materials science , nanotechnology , inorganic chemistry , catalysis , electrode , optoelectronics , artificial photosynthesis , organic chemistry , physics , nuclear physics , enzyme
The oxidation ability of plasmonic photocatalysts, which has its origins in plasmon‐induced charge separation and has not yet been studied quantitatively and systematically, is important for designing practical photocatalytic systems. Oxidation ability was investigated on the basis of surface hydroxylation of Au nanoparticles on TiO 2 at various irradiation wavelengths and electrolyte pH values. The reaction proceeds only when the sum of the flat band potential of TiO 2 and the irradiated photon energy is close to, or more positive than, the theoretical potential for the reaction.