Photocatalytic H2 evolution by layered perovskite Ca 3Ti2O7 codoped with Rh and Ln (Ln = La, Pr, Nd, Eu, Gd, Yb, and Y) under visible light irradiation

Shunsuke Nishimoto, Yoshihiro Okazaki, Motohide Matsuda, Michihiro Miyake

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Layered perovskite Ca3Ti2O7 codoped with Rh and Ln (Ca3-xLnxTi1.9Rh0.1O 7; Ln = La, Pr, Nd, Eu, Gd, Yb, and Y; 0 ≤ x ≤ 0.15) was synthesized by a conventional solid-state reaction to investigate the effects of Rh and Ln codoping on the photocatalytic activity. Rh and Ln-codoped Ca 3Ti2O7 exhibited a higher photocatalytic activity than Rh-doped Ca3Ti2O7 for H 2 production from an aqueous methanol solution under visible light irradiation (γ > 420 nm). In addition, the induction period for H 2 production was shortened by codoping with Rh and Ln. The codoped elements helped control the oxidation state of Rh ions and suppressed the formation of oxygen defects, improving the activity of the Rh-doped Ca 3Ti2O7 photocatalyst.

Original languageEnglish
Pages (from-to)1175-1179
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume117
Issue number1371
DOIs
Publication statusPublished - Nov 2009

Keywords

  • Codoping
  • Hydrogen production
  • Perovskite
  • Photocatalyst
  • Visible light response

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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