Abstract
Photocatalytic reduction of carbon dioxide on TiO 2 nanocrystals embedded in SiO 2 matrices (Q-TiO 2 /SiO 2 ) and bulk CdS particles with and without surface modification by several thiol compounds was investigated in various kinds of solvents. Formate and carbon monoxide were obtained as the major reduction products and the ratio of the former to the latter was increased with an increase in the dielectric constant of the solvents used for the use of Q-TiO 2 /SiO 2 and bare CdS particles as photocatalysts. The surface modification of CdS particles with thiol compounds was effective in enhancing the ratio of formate to carbon monoxide. The observed selectivity of CO 2 reduction products was explained well in terms of the stabilization of reaction intermediates on the photocatalyst surface.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
