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Size‐Dependence of the Activity of Gold Nanoparticle‐Loaded Titanium(IV) Oxide Plasmonic Photocatalyst for Water Oxidation
Author(s) -
Teranishi Miwako,
Wada Masataka,
Naya Shinichi,
Tada Hiroaki
Publication year - 2016
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201600269
Subject(s) - tin oxide , materials science , nanocrystalline material , photocatalysis , mesoporous material , nanoparticle , aqueous solution , chemical engineering , titanium oxide , visible spectrum , colloidal gold , oxide , electrode , titanium , anode , inorganic chemistry , nanotechnology , chemistry , catalysis , optoelectronics , biochemistry , engineering , metallurgy
Mesoporous TiO 2 nanocrystalline film was formed on fluorine‐doped tin oxide electrode (TiO 2 /FTO) and gold nanoparticles (NPs) of different sizes were loaded onto the surface with the loading amount kept constant (Au/TiO 2 /FTO). Visible‐light irradiation ( λ >430 nm) of the Au/TiO 2 /FTO photoanode in a photoelectrochemical cell with the structure of photoanode|0.1 m NaClO4 aqueous solution|Ag/AgCl (reference electrode)|glassy carbon (cathode) leads to the oxidation of water to oxygen (O 2 ). We show that the visible‐light activity of the Au/TiO 2 /FTO anode increases with a decrease in Au particle size ( d ) at 2.9≤ d ≤11.9 nm due to the enhancement of the charge separation and increasing photoelectrocatalytic activity.