Publication detail

Wavelength Effect on Photocatalytic Reduction of CO(2) by Ag/TiO(2) Catalyst

Year: 2011

Type of publication: článek v odborném periodiku

Name of source: Chinese Journal of Catalysis

Publisher name: Science China Press

Page from-to: 812-815

Titles:

Language	Name	Abstract	Keywords
cze	Vliv vlnové délky na fotokatalytickou redukci CO(2) pomocí Ag/TiO(2) katalyzátoru	Fotokatalytická redukce CO2 vodou byla studována v přítomnosti katalyzátoru Ag/TiO(2) při různých vlnových délkách světla. Vliv vlnové délky na fotokatalytickou aktivitu byl diskutován.	Ag dotace; TiO2; CO2 redukce
eng	Wavelength Effect on Photocatalytic Reduction of CO(2) by Ag/TiO(2) Catalyst	Photocatalytic reduction of CO(2) by water was performed in the presence of a Ag/TiO(2) catalyst under illumination by lamps with different wavelengths (254, 365, and 400 nm). The yields of the main products (methane and methanol) were higher with the 254 nm lamp than with the 365 lamp while no products were observed with the 400 nm lamp. This was because the electron-hole generation rate increased with increasing energy of irradiation (decreasing wavelength) and there were higher densities of electron states at higher energies in TiO(2). The increased efficiency of electron-hole generation with a shorter wavelength irradiation increased the efficiency of the catalyst. The energy of the electrons excited by visible light (400 nm) was too low for CO(2) photocatalytic reduction.	silver doping; titania; carbon dioxide reduction

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