The process of photochemical reduction of CO2 by H2O with the participation of mesoporous anatase and both mono- and bimetallic nanostructures based on it has been investigated. It has been shown that modification of TiO2 with Cu leads to the greatest increase in activity in the reduction of CO2 to CH4 as compared with other metals (Au, Bi, Ni, Cd, In, Ag, Rh, Pb). The activity of bimetallic nanostructures has been found to be significantly higher compared to monometallic nanostructures. Besides it depends on order of priority of depositing metals on the semiconductor surface, the highest rate of methane production is observed in the deposition of copper on the pre-formed metal nanoparticles. The rate of accumulation of methane in the reactor by irradiation of photocatalysts increases in the row TiO2/Ni@Cu&lt; TiO2/Rh@Cu&lt; TiO2/Cd@Cu&lt; TiO2/In@Cu&lt; TiO2/Bi@Cu&lt; TiO2/Au@Cu&lt; TiO2/Pb@Cu&lt; TiO2/Ag@Cu. It has been determined that there is an optimum molar ratio of "gold-copper" and "silver-copper" of 1: 3 and 1: 6 respectively, in which methane formation rate is maximum.

Modification of titanium dioxide by mono- and bimetallic nanoparticles to improve the activity of the photocatalytic reduction of carbon dioxide by water vapor

251st National Meeting (2016)

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