Basic study for the application of Cu supported ZnS and ZnO photocatalysts for the CO{sub 2} conversion into alcohol
- Graduate School of Environmental Studies, Tohoku University 6-6-20, Aramaki, Aoba-ku, Sendai, 980-8579 (Japan)
Transformation of CO{sub 2} 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, [(Cu{sup 2+})(MEA){sub 2}] and [(Cu{sup 2+})(MEA){sub 3}] and/or negatively charged species, [(Cu{sup 2+})(OH{sup −})(cit{sup 3−})] 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.
- OSTI ID:
- 22261735
- Journal Information:
- AIP Conference Proceedings, Vol. 1568, Issue 1; Conference: International workshop on solar-chemical energy storage (SolChES), Sendai (Japan), 23-28 Jul 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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