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Unravelling Synergistic Dual Roles of Metal Nanocrystals toward Plasmonic Photoredox Catalysis

Abstract

Metal nanocrystals (NCs) have been recognized as an important sector of nanomaterials by virtue of their unique surface plasmon resonance (SPR) effect and pivotal roles as electron traps in photocatalysis; nevertheless, it is still challenging to unambiguously unravel and simultaneously harness these dual synergistic roles of metal NCs in a single photocatalytic system for solar-to-chemical energy conversion. Herein, an efficient ligand-triggered electrostatic self-assembly strategy has been developed to achieve spontaneous and monodispersed attachment of Au NCs on the 1D WO3 nanorods (NRs) via pronounced electrostatic attractive interaction, by which tailor-made positively charged Au NCs were closely integrated with negatively charged WO3 NRs. The intimate integration of Au NCs with WO3 NRs at nanoscale significantly benefit the extraction, separation and migration of plasmon-induced energetic hot carriers over Au NCs and, meanwhile, promote the separation of photogenerated charge carriers over WO3 substrate. Such cooperative synergy stemming from SPR and electron withdrawal effects of Au NCs results in the distinctly enhanced photoredox catalytic performances for plasmonic photocatalysis under both simulated solar and visible light irradiation. Our work could highlight the significance of rational interface design between metal NCs and semiconductors for excavating the multifacious roles of metal NCs for substantial solar energy conversion.

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Publication details

The article was received on 03 Jul 2017, accepted on 10 Oct 2017 and first published on 11 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR04802E
Citation: Nanoscale, 2017, Accepted Manuscript
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    Unravelling Synergistic Dual Roles of Metal Nanocrystals toward Plasmonic Photoredox Catalysis

    K. Jiang, Y. Weng, S. Guo, Y. Yu and F. Xiao, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR04802E

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