Particle size effects of tetrahedron-shaped Ag3PO4 photocatalyst on water-oxidation activity and carrier recombination dynamics

Ryo Miyasato, Masazumi Fujiwara, Haruyuki Sato, Toshihiro Yano, Hideki Hashimoto

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We investigated photocatalytic water-oxidation performance of tetrahedron-shaped silver phosphate (Ag3PO4) crystals with various particle sizes. The performance was clearly influenced by the particle size. The maximum activity was found for the particle with a tetrahedron edge with 1.5 μm length, which showed the highest rate of oxygen evolution. A series of analysis against time-resolved diffuse reflection spectra of the powder samples reveals that not only carrier recombination dynamic but also photoexcited carrier density can play important roles in the water oxidation. Our finding should contribute to give one of the basic ideas when designing semiconductor photocatalysts for water splitting.

Original languageEnglish
Article number100023
JournalChemical Physics Letters: X
Volume2
DOIs
Publication statusPublished - Apr 2019
Externally publishedYes

Keywords

  • Carrier dynamics
  • Global analysis
  • Photocatalytic water oxidation
  • Silver phosphate

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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