Basic study for the application of Cu supported ZnS and ZnO photocatalysts for the CO2 conversion into alcohol

Yasuharu Kajino, Hideyuki Takahashi, Kazuyuki Tohji

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

Abstract

Transformation of CO2 into alcohol by using photocatalysts is one of the "green" methods to solve the environmental problem. In this study, to increase the activity, condition of Cu co-catalysts onto the substrate (Zn photocatalysts) were precisely controlled by obeying to relationship between the surface potential of substrate and the condition of metal complexes in solution by applying the metal complexes calculation using critical stability constants. By obeying to calculation results, Cu metal complexes with positively charged species, [(Cu2+)(MEA)2] and [(Cu2+)(MEA)3] and/or negatively charged species, [(Cu2+)(OH-)(cit3-)] monomer and dimmer, were stably synthesized. Absorption amount of Cu species was successfully controlled by using these solutions since surface potential of ZnO was negative. When the concentration of Cu in the solution was same, the difference of adsorption amount led the difference of the number of nuclear site of Cu particles. As a result, the size of co-catalysts in the case of MEA became smaller.

Original languageEnglish
Title of host publicationSolar Chemical Energy Storage, SolChES 2012
EditorsKatsushi Fujii, Masakazu Sugiyama, Shin Nakamura
PublisherAmerican Institute of Physics Inc.
Pages24-27
Number of pages4
ISBN (Electronic)9780735411968
DOIs
Publication statusPublished - 2013 Jan 1
Event1st International Workshop on Solar Chemical Energy Storage, SolChES 2012 - Sendai, Japan
Duration: 2012 Jul 232012 Jul 28

Publication series

NameAIP Conference Proceedings
Volume1568
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other1st International Workshop on Solar Chemical Energy Storage, SolChES 2012
CountryJapan
CitySendai
Period12/7/2312/7/28

Keywords

  • CO
  • Cu complexes
  • Photocatalysts
  • co-catalysts
  • critical stability constants

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Kajino, Y., Takahashi, H., & Tohji, K. (2013). Basic study for the application of Cu supported ZnS and ZnO photocatalysts for the CO2 conversion into alcohol. In K. Fujii, M. Sugiyama, & S. Nakamura (Eds.), Solar Chemical Energy Storage, SolChES 2012 (pp. 24-27). (AIP Conference Proceedings; Vol. 1568). American Institute of Physics Inc.. https://doi.org/10.1063/1.4848083