Utilization of a ZnS(en)0.5 photocatalyst hybridized with a CdS component for solar energy conversion to hydrogen

Hyejin Kang, Jung Hyeun Kim

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Photocatalytic solar energy conversion to chemical energy attracts great attention due to its high potential in harvesting renewable energy for the future. A ZnS(en)0.5 photocatalyst hybridized with a CdS component was synthesized by solvothermal and precipitation methods to compare the effect of preparation methods on photocatalytic performance. The highest hydrogen production rate (559 μmol g−1 h−1) was achieved from a solvothermally synthesized ZnS(en)0.5−CdS composite at 80 wt% of CdS content under standard 1-sun-irradiation condition (1000 W/m2). Photocatalytic hydrogen production rates from ZnS(en)0.5−CdS photocatalysts were highly associated with degrees of charge separation, crystallinity, reduction power, and light absorption. By comparing two different routes for the synthesis of ZnS(en)0.5−CdS photocatalysts, solvothermally-fabricated material was shown to have a higher photocatalytic activity compared with material fabricated by a precipitation method. This improvement may be due to its excellent crystalline and charge-separation characteristics.

Original languageEnglish
Pages (from-to)2438-2444
Number of pages7
JournalAdvanced Powder Technology
Volume28
Issue number9
DOIs
StatePublished - Sep 2017

Keywords

  • Hydrogen
  • Photocatalyst
  • Recombination
  • Solvothermal
  • ZnS

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