Interfacing BiVO4 with Reduced Graphene Oxide for Enhanced Photoactivity : A Tale of Facet Dependence of Electron Shuttling

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

31 Scopus Citations
View graph of relations

Author(s)

  • Hui Ling Tan
  • Hassan A. Tahini
  • Xiaoming Wen
  • Roong Jien Wong
  • Xin Tan
  • Akihide Iwase
  • Akihiko Kudo
  • Rose Amal
  • Sean C. Smith

Detail(s)

Original languageEnglish
Pages (from-to)5295-5302
Journal / PublicationSmall
Volume12
Issue number38
Online published21 Jul 2016
Publication statusPublished - 12 Oct 2016
Externally publishedYes

Abstract

Efficient interfacial charge transfer is essential in graphene-based semiconductors to realize their superior photoactivity. However, little is known about the factors (for example, semiconductor morphology) governing the charge interaction. Here, it is demonstrated that the electron transfer efficacy in reduced graphene oxide-bismuth oxide (RGO/BiVO4) composite is improved as the relative exposure extent of {010}/{110} facets on BiVO4 increases, indicated by the greater extent of photocurrent enhancement. The dependence of charge transfer ability on the exposure degree of {010} relative to {110} is revealed to arise due to the difference in electronic structures of the graphene/BiVO4{010} and graphene/BiVO4{110} interfaces, as evidenced by the density functional theory calculations. The former interface is found to be metallic with higher binding energy and smaller Schottky barrier than that of the latter semiconducting interface. The facet-dependent charge interaction elucidated in this study provides new aspect for design of graphene-based semiconductor photocatalyst useful in manifold applications.

Research Area(s)

  • bismuth vanadate, electron transfer, graphene, photocatalysis, photoelectrochemistry

Citation Format(s)

Interfacing BiVO4 with Reduced Graphene Oxide for Enhanced Photoactivity : A Tale of Facet Dependence of Electron Shuttling. / Tan, Hui Ling; Tahini, Hassan A.; Wen, Xiaoming; Wong, Roong Jien; Tan, Xin; Iwase, Akihide; Kudo, Akihiko; Amal, Rose; Smith, Sean C.; Ng, Yun Hau.

In: Small, Vol. 12, No. 38, 12.10.2016, p. 5295-5302.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal