Plasmonic photocatalysis

Xuming Zhang, Yu Lim Chen, Ru Shi Liu, Din Ping Tsai

Research output: Contribution to journalArticle

753 Citations (Scopus)

Abstract

Plasmonic photocatalysis has recently facilitated the rapid progress in enhancing photocatalytic efficiency under visible light irradiation, increasing the prospect of using sunlight for environmental and energy applications such as wastewater treatment, water splitting and carbon dioxide reduction. Plasmonic photocatalysis makes use of noble metal nanoparticles dispersed into semiconductor photocatalysts and possesses two prominent features - a Schottky junction and localized surface plasmonic resonance (LSPR). The former is of benefit to charge separation and transfer whereas the latter contributes to the strong absorption of visible light and the excitation of active charge carriers. This article aims to provide a systematic study of the fundamental physical mechanisms of plasmonic photocatalysis and to rationalize many experimental observations. In particular, we show that LSPR could boost the generation of electrons and holes in semiconductor photocatalysts through two different effects - the LSPR sensitization effect and the LSPR-powered bandgap breaking effect. By classifying the plasmonic photocatalytic systems in terms of their contact form and irradiation state, we show that the enhancement effects on different properties of photocatalysis can be well-explained and systematized. Moreover, we identify popular material systems of plasmonic photocatalysis that have shown excellent performance and elucidate their key features in the context of our proposed mechanisms and classifications.

Original languageEnglish
Article number046401
JournalReports on Progress in Physics
Volume76
Issue number4
DOIs
Publication statusPublished - 2013 Apr

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Zhang, X., Chen, Y. L., Liu, R. S., & Tsai, D. P. (2013). Plasmonic photocatalysis. Reports on Progress in Physics, 76(4), [046401]. https://doi.org/10.1088/0034-4885/76/4/046401