Synthesis of ZnxCd1-xS solid solution by stratified method

Takeo Arai, Makoto Nakazato, Kozo Shinoda, Balachandran Jeyadevan, Kazuyuki Tohji

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, we focused our attention on photocatalytic decomposition of hydrogen sulfide as the resource of hydrogen using solar energy and prepared ZnxCd1-xS solid solution as photocatalyst. Samples were prepared by "stratified" method using Zn and Cd hydroxides as precursors and "coprecipitation" method under various Zn/ Cd ratios to study the influence of Cd concentration on the properties such as crystal structure, light absorption and reactivity. The continuous change in the crystal lattice constant and UV-VIS reflection spectra from ZnS to CdS was observed in the ZnxCd1-xS samples prepared by both "coprecipitation" and "stratified" methods with increasing concentration of Cd. In the case of coprecipitation method, the reactivity was improved with the increase of Cd. But, in the case of stratified method, the particles prepared at Zn:Cd=2:1 showed higher reactivity than the samples prepared at higher ratios of Cd and the samples prepared by coprecipitation method with similar Zn/Cd ratios. The samples prepared by stratified method at higher ratio of Zn/Cd turned black from yellow in color when exposed to light irradiation. This was believed due to the metal deposited by photocatalytic reduction of precursors. This metal deposition influences the photoreactivity of ZnxCd1-xS particles and is optimum for Zn 0.67Cd0.33S.

Original languageEnglish
Title of host publicationWATER DYNAMICS
Subtitle of host publication3rd International Workshop on Water Dynamics
Pages116-121
Number of pages6
DOIs
Publication statusPublished - 2006 May 15
EventWATER DYANMICS: 3rd International Workshop on Water Dynamics - Sendai, Japan
Duration: 2005 Nov 162005 Nov 17

Publication series

NameAIP Conference Proceedings
Volume833
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherWATER DYANMICS: 3rd International Workshop on Water Dynamics
CountryJapan
CitySendai
Period05/11/1605/11/17

Keywords

  • Hydrogen generation
  • Hydrogen sulfide
  • Photocatalyst
  • Stratified material

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Arai, T., Nakazato, M., Shinoda, K., Jeyadevan, B., & Tohji, K. (2006). Synthesis of ZnxCd1-xS solid solution by stratified method. In WATER DYNAMICS: 3rd International Workshop on Water Dynamics (pp. 116-121). (AIP Conference Proceedings; Vol. 833). https://doi.org/10.1063/1.2207088