Surface plasmon-driven photoelectrochemical water splitting of a Ag/TiO<inf>2</inf>nanoplate photoanode
Issued Date
2022-01-20
Resource Type
eISSN
20462069
Scopus ID
2-s2.0-85124104962
Journal Title
RSC Advances
Volume
12
Issue
5
Start Page
2652
End Page
2661
Rights Holder(s)
SCOPUS
Bibliographic Citation
RSC Advances Vol.12 No.5 (2022) , 2652-2661
Suggested Citation
Peerakiatkhajohn P., Yun J.H., Butburee T., Nisspa W., Thaweesak S. Surface plasmon-driven photoelectrochemical water splitting of a Ag/TiO<inf>2</inf>nanoplate photoanode. RSC Advances Vol.12 No.5 (2022) , 2652-2661. 2661. doi:10.1039/d1ra09070d Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/84116
Title
Surface plasmon-driven photoelectrochemical water splitting of a Ag/TiO<inf>2</inf>nanoplate photoanode
Other Contributor(s)
Abstract
A silver/titanium dioxide nanoplate (Ag/TiO2 NP) photoelectrode was designed and fabricated from vertically aligned TiO2 nanoplates (NP) decorated with silver nanoparticles (NPs) through a simple hydrothermal synthesis and electrodeposition route. The electrodeposition times of Ag NPs on the TiO2 NP were crucial for surface plasmon-driven photoelectrochemical (PEC) water splitting performance. The Ag/TiO2 NP at the optimal deposition time of 5 min with a Ag element content of 0.53 wt% demonstrated a remarkably high photocurrent density of 0.35 mA cm-2 at 1.23 V vs. RHE under AM 1.5G illumination, which was 5 fold higher than that of the pristine TiO2 NP. It was clear that the enhanced light absorption properties and PEC performance for Ag/TiO2 NP could be effectively adjusted by simply controlling the loading amounts of metallic Ag NPs (average size of 10-30 nm) at different electrodeposition times. The superior PEC performance of the Ag/TiO2 NP photoanode was attributed to the synergistic effects of the plasmonic Ag NPs and the TiO2 nanoplate. Interestingly, the plasmonic effect of Ag NPs not only increased the visible-light response (λmax = 570 nm) of TiO2 but also provided hot electrons to promote photocurrent generation and suppress charge recombination. Importantly, this study offers a potentially efficient strategy for the design and fabrication of a new type of TiO2 hybrid nanostructure with a plasmonic enhancement for PEC water splitting. This journal is