Plasmonic hot carrier-driven oxygen evolution reaction on Au nanoparticles/TiO2 nanotube arrays

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Title
Plasmonic hot carrier-driven oxygen evolution reaction on Au nanoparticles/TiO2 nanotube arrays
Author(s)
Song Yi Moon; Hee Chan Song; Eun Heui Gwag; Ievgen I. Nedrygailov; Changhwan Lee; Jeong Jin Kim; Won Hui Doh; Jeong Young Park
Publication Date
2018-12
Journal
NANOSCALE, v.10, no.47, pp.22180 - 22188
Publisher
ROYAL SOC CHEMISTRY
Abstract
The use of hot carriers generated from the decay of localized surface plasmon resonance in noble metal nanoparticles is a promising concept for photocatalysis. Here, we report the enhancement of photocatalytic activity by the flow of hot electrons on TiO2 nanotube arrays decorated with 5-30 nm Au nanoparticles as photoanodes for photoelectrochemical water splitting. This enhanced photocatalytic activity is correlated to the size of the Au nanoparticles, where higher oxygen evolution was observed on the smaller nanoparticles. Conductive atomic force microscopy and ultraviolet photoelectron spectroscopy were used to characterize the Schottky barrier between Au and TiO2, which reveals a reduction in the Schottky barrier with the smaller Au nanoparticles and produces an enhanced transfer of photoinduced hot carriers. This study confirms that the higher photocatalytic activity was indeed driven by the hot electron flux generated from the decay of localized surface plasmon resonance. © The Royal Society of Chemistry 2018
URI
https://pr.ibs.re.kr/handle/8788114/6184
ISSN
2040-3364
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
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