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Reducing Graphene Oxide on a Visible-light BiVO4 Photocatalyst for an Enhanced Photoelectrochemical Water Splitting
Journal of Physical Chemistry Letters (2010)
  • Yun Hau Ng
  • Akihide Iwase
  • Akihiko Kudo
  • Rose Amal
Abstract

Bismuth vanadate (BiVO4) is incorporated with reduced graphene oxide (RGO) using a facile single-step photocatalytic reaction to improve its photoresponse in visible light. Remarkable ten-fold enhancement in photoelectrochemical water splitting reaction is observed on BiVO4-RGO composite compared with pure BiVO4 under visible illumination. This improvement is attributed to the longer electron lifetime of excited BiVO4 as the electrons are injected to RGO instantly at the site of generation leading to a minimized charge recombination. Improved contact between BiVO4 particles with transparent conducting electrode using RGO scaffold is also contributing to this photoresponse enhancement.

Keywords
  • Reduced Graphene Oxide; Bismuth Vanadate; Water Splitting; Photocatalysis
Publication Date
August, 2010
Citation Information
Yun Hau Ng, Akihide Iwase, Akihiko Kudo and Rose Amal. "Reducing Graphene Oxide on a Visible-light BiVO4 Photocatalyst for an Enhanced Photoelectrochemical Water Splitting" Journal of Physical Chemistry Letters Vol. 1 (2010)
Available at: http://works.bepress.com/yunhau_ng/26/