Chromium-doped bismuth titanate nanosheets as enhanced visible-light photocatalysts with a high percentage of reactive {110} facets

Jungang Hou, Rui Cao, Zheng Wang, Shuqiang Jiao, Komin Shu

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

Single-crystalline chromium doped bismuth titanate (Bi4Ti 3-xCrxO12, x = 0.0-0.5) nanosheets with exposed {110} facets have been synthesized via a facile hydrothermal process. The Bi4Ti3-xCrxO12 nanosheets possess well-defined tetragonal shapes with landscape dimension of 100-300 nm and thickness of 10-30 nm. The in-plane surfaces of the nanosheets lies on {001}, and the side surfaces are (110) and (110). Extension of the light absorption from the ultraviolet region to the visible-light region arises from the Cr 2p levels confirmed by XPS spectra. The Bi4Ti2.6Cr 0.4O12 nanosheets with high stability showed the highest photocatalytic performance of H2 evolution from water under visible-light irradiation. Furthermore, the heterostructures by using the NiOx nanoparticles tightly coupled on the surface of Bi 4Ti2.6Cr0.4O12 nanosheets, exhibited an enhanced photocatalytic activity due to the decrease in the recombination rate of the photoinduced electrons and holes, demonstrating that NiO x/Bi4Ti2.6Cr0.4O12 nanosheet is a promising candidate as a visible light photocatalyst.

Original languageEnglish
Pages (from-to)7296-7301
Number of pages6
JournalJournal of Materials Chemistry
Volume21
Issue number20
DOIs
Publication statusPublished - 2011 May 28
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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