Cu-doped ZnS hollow particle with high activity for hydrogen generation from alkaline sulfide solution under visible light

Takeo Arai, Shin Ichiro Senda, Yoshinori Sato, Hideyuki Takahashi, Kozo Shinoda, Balachandran Jeyadevan, Kazuyuki Tohji

Research output: Contribution to journalArticlepeer-review

144 Citations (Scopus)

Abstract

Visible light sensitive and highly active Cu-doped ZnS hollow photocatalyst particles "Cu-ZnS-shell" were successfully developed. These particles could generate H2 through photocatalytic decomposition of HS - ion in Na2S solution. The photoactivity under xenon lamp irradiation was 6 and 130 times higher than that of copper-free "ZnS-shell" and coprecipitated ZnS particles, respectively. "Cu-ZnS-shell" particles were prepared by doping the "ZnS-shell" particles synthesized using zinc oxide as precursor with Cu, utilizing the difference in ionization tendency between zinc and copper. Though the photoactivity of "ZnS-shell" was higher than that of coprecipitated ZnS, their photoactivity under visible light conditions was low. However, the "Cu-ZnS-shell" was active to light of wavelengths higher than 440 nm and is preferred over CdS, which requires an expensive support metal catalyst such as platinum to decompose HS- ion.

Original languageEnglish
Pages (from-to)1997-2000
Number of pages4
JournalChemistry of Materials
Volume20
Issue number5
DOIs
Publication statusPublished - 2008 Mar 11

ASJC Scopus subject areas

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

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