Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (7): 1219-1227.DOI: 10.1016/S1872-2067(18)63094-3

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Effects of Au nanoparticle size and metal-support interaction on plasmon-induced photocatalytic water oxidation

Shengyang Wanga,b, Bin Zenga,b, Can Lia   

  1. a State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, and the Collaborative Innovation Center of Chemistry for Energy Mate-rials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-12-27 Revised:2018-04-29 Online:2018-07-18 Published:2018-06-07
  • Contact: 10.1016/S1872-2067(18)63094-3
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21633010), the National Basic Research Program of China (973 pro-gram, 2014CB239400), and the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB01020300).

Abstract:

Plasmonic photocatalysis with tunable light absorption has aroused significant attention in so-lar-to-chemical energy conversion. However, the energy conversion efficiency of plasmonic photo-catalysts is impeded by ineffective charge separation and the lack of highly active sites for redox reactions. In this work, the Au nanoparticle size and Au-TiO2 interaction of the Au/TiO2 plasmonic photocatalyst were adjusted simultaneously using a post-calcination treatment. The visi-ble-light-induced water oxidation activity exhibited a volcano-like relationship with the calcination temperature; the treated photocatalyst at 600℃ manifested the highest activity. Characterization with UV-visible spectra, XRD, SEM, and XPS revealed that the effect of the Au nanoparticle size and Au-TiO2 interaction were both responsible for the increase in plasmon-induced water oxidation activity.

Key words: Au/TiO2, Water oxidation, Plasmonic photocatalysis, Size effect, Metal-semiconductor interaction