Size‐Dependence of the Activity of Gold Nanoparticle‐Loaded Titanium(IV) Oxide Plasmonic Photocatalyst for Water Oxidation |
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| Authors: | Miwako Teranishi Masataka Wada Dr. Shin‐ichi Naya Prof. Hiroaki Tada |
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| Affiliation: | 1. Environmental Research Laboratory, Kindai University, Osaka, Japan;2. Department of Applied Chemistry, School of Science and Engineering, Kindai University, Osaka, Japan |
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| Abstract: | Mesoporous TiO2 nanocrystalline film was formed on fluorine‐doped tin oxide electrode (TiO2/FTO) and gold nanoparticles (NPs) of different sizes were loaded onto the surface with the loading amount kept constant (Au/TiO2/FTO). Visible‐light irradiation (λ>430 nm) of the Au/TiO2/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 (O2). We show that the visible‐light activity of the Au/TiO2/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. |
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| Keywords: | Au nanoparticles particle size effects plasmonic photocatalysts TiO2 water oxidation |
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