Roles of Bi, M and VO 4 tetrahedron in photocatalytic properties of novel Bi 0.5M 0.5VO 4 (M=La, Eu, Sm and Y) solid solutions for overall water splitting

Hui Liu, Jian Yuan, Zhi Jiang, Wenfeng Shangguan, Hisahiro Einaga, Yasutake Teraoka

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Novel Bi 0.5M 0.5VO 4 (BMV; M=La, Eu, Sm and Y) solid solutions were prepared and studied in this paper. All the samples were proved to produce H 2 and O 2 simultaneously from pure water under the irradiation of UV light. MO bond lengths were proved to increase with M cations by refining cell parameters and atomic positions. Besides, band gaps, energy gaps and photocatalytic activities of BMV also changed with M cations. Both of MO and VO bond lengths were suggested to account for this phenomenon. Inactive A 0.5Y 0.5VO 4 (A=La, Ce) for water splitting proved incorporation of Bi rather than distortion of VO 4 tetrahedron was a critical factor for improving efficiency of overall water splitting by facilitating the generation of electron and hole with lighter effective masses. Replacement of Bi by M cations not only gave indirect effect on band structure but also raised position of conduction band minimum to meet requirement of H 2 production.

Original languageEnglish
Pages (from-to)70-75
Number of pages6
JournalJournal of Solid State Chemistry
Volume186
DOIs
Publication statusPublished - Feb 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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