Plasmonic Nanohole Arrays with Enhanced Visible Light Photoelectrocatalytic Activity

Huaping Jia, Zhiyong Li, Bingzhe Wang, Guichuan Xing, Yat Lam Wong, Hui Ren, Mingjie Li, Kwok Yin Wong, Dangyuan Lei, Lok Wing Wong, Jiong Zhao, Wendong Zhang, Shengbo Sang, Aoqun Jian, Xuming Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Metallic nanohole arrays exciting both surface plasmon polariton (SPP) and localized surface plasmon resonance (LSPR) in a single thin film have sparked considerable interest in the field of plasmonics. To exert their full potential for the generation of hot electrons in visible light, we bury an Au nanohole array (AuNHA) under a thin TiO2 layer and decorate Pt nanoparticles randomly on the surface to form the Pt/TiO2/AuNHA nanocomposite. As compared to the Pt/TiO2/Au film, the Pt/TiO2/AuNHA sample with a 90 nm hole diameter shows an enhancement of 4.1 folds in photocurrent density, 14.7 folds in the peak of incident photon-to-current conversion efficiency, and 9.4 folds in the degradation of methyl orange. Moreover, numerical simulations are conducted to analyze the contributions of SPP and LSPR effects at different wavelengths. This work is the first study of AuNHAs fully covered by a thin TiO2 film and provides a unique design of photoelectrodes for solar photocatalysis applications.

Original languageEnglish
Pages (from-to)652-663
Number of pages12
JournalACS Photonics
Volume9
Issue number2
DOIs
Publication statusPublished - 16 Feb 2022

Keywords

  • Anodic aluminum oxide (aao)
  • Au nanohole array
  • Hot electrons
  • Plasmonic photocatalysis
  • Surface plasmon

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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