Photocatalytic properties of CdS and CdS—ZnS mixtures incorporated into the interlayer of layered compounds

Tsugio Sato, Katsuhiko Masaki, Toshiaki Yoshioka, Akitsugu Okuwaki

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Semiconductor particles composed of CdS and mixed CdS—ZnS were incorporated into the interlayers of layered compounds such as H4Nb6O17, H2Ti4O9, montmorillonite and layered double hydroxides, [M(II)1‐xM(III)x(OH)2](CO3)x/2.nH2O(M(II) = Mg2+, Zn2+, M(III) = Al3+, x = 0.33), by the chemical reactions between S2‐ and Cd2+—Zn2+ and/or Cd(edta)2‐—Zn(edta)2‐ in the interlayers. The incorporated particles seemed to be very small, less than 1 nm thick. The band gap energies of CdS and CdS‐ZnS mixtures in the interlayer were significantly larger than those of normal‐crystalline ones. The CdS‐ZnS mixtures incorporated into the interlayers were capable of efficient hydrogen evolution following irradiation with visible light in the presence of Na2S, Na2SO3 and/or 2‐aminoethanol as a sacrificial donor. The hydrogen production activities of the CdS—ZnS mixtures incorporated into the interlayers were superior to those of unsupported CdS—ZnS. The incorporation of the CdS—ZnS mixtures in the interlayer of a semiconductor such as H2Ti4O9 and H4Nb6O17 was much more efficient in enhancing the hydrogen production activity than when an insulator such as montmorillonite and layered double hydroxide was used.

Original languageEnglish
Pages (from-to)315-319
Number of pages5
JournalJournal of Chemical Technology & Biotechnology
Volume58
Issue number4
DOIs
Publication statusPublished - 1993 Jan 1

Keywords

  • CdS—ZnS mixture
  • incorporation into the interlayer
  • layered compounds
  • photocatalyst
  • visible light irradiation

ASJC Scopus subject areas

  • Biotechnology
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Waste Management and Disposal
  • Pollution
  • Organic Chemistry
  • Inorganic Chemistry

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