Photoelectrochemical response of TlVO4 and InVO 4:TlVO4 composite

Dennis P. Butcher, Andrew A. Gewirth

Research output: Contribution to journalArticlepeer-review

Abstract

This work presents photoelectrochemical characteristics of TlVO 4, a previously uncharacterized candidate for photocatalytic water splitting. Additionally, a composite of InVO4 and TlVO4 was synthesized by a facile solution method using orthorhombic InVO4 as a seed for growth of crystallographically similar orthorhombic TlVO 4. Photoelectrochemical measurements indicate an increase in photocurrent and more negative flatband potentials for TlVO4 and the InVO4:TlVO4 composite relative to InVO4. Diffuse reflectance UV-visible measurements were used to determine bandgaps of 3.50 eV, 2.94 eV, and 2.98 eV for InVO4, TlVO4, and InVO4:TlVO4, respectively. Density functional theory (DFT) calculations were performed to elucidate the band structures and correlate well with experimental data. The results indicate higher photoelectrochemical activity for TlVO4 and the InVO4:TlVO4 composite relative to InVO4.

Original languageEnglish (US)
Pages (from-to)2555-2562
Number of pages8
JournalChemistry of Materials
Volume22
Issue number8
DOIs
StatePublished - Apr 27 2010

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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