▎ 摘　　要

NOVELTY - Photocatalytic reduction of carbon dioxide involves treating an alkaline aqueous solution saturated with gaseous carbon dioxide, with 1 g/dm3 photocatalyst. The alkaline aqueous solution is sodium hydroxide with a concentration of 0.2 M. The photocatalyst is a modified titanium dioxide photocatalyst obtained by rubbing a titanium dioxide powder with the reduced graphene oxide, subjecting the composite to hydrothermal treatment at 180 degrees C in an autoclave in the presence of 2-propanol for 4 hours under pressure and then for 1 hour at the same temperature and atmospheric pressure, and annealing the composite under an inert gas atmosphere at 300-1000 degrees C for 4 hours. The titanium dioxide powder is an industrial anatase-type titanium dioxide having specific surface area of 300 m2/g or more and a particle size of up to 400 nm. The reduced graphene oxide is commercial reduced graphene oxide in the form of flakes. The inert gas atmosphere contains argon, helium and/or nitrogen. USE - Photocatalytic reduction of carbon dioxide. DETAILED DESCRIPTION - Photocatalytic reduction of carbon dioxide involves treating an alkaline aqueous solution saturated with gaseous carbon dioxide, with 1 g/dm3 photocatalyst. The alkaline aqueous solution is sodium hydroxide with a concentration of 0.2 M. The photocatalyst is a modified titanium dioxide photocatalyst obtained by rubbing a titanium dioxide powder with the reduced graphene oxide, subjecting the composite to hydrothermal treatment at 180 degrees C in an autoclave in the presence of 2-propanol for 4 hours under pressure and then for 1 hour at the same temperature and atmospheric pressure, and annealing the composite under an inert gas atmosphere at 300-1000 degrees C for 4 hours. The titanium dioxide powder is an industrial anatase-type titanium dioxide having specific surface area of 300 m2/g or more and a particle size of up to 400 nm. The reduced graphene oxide is commercial reduced graphene oxide in the form of flakes. The inert gas atmosphere contains argon, helium and/or nitrogen. The mass ratio of titanium dioxide to reduced graphene oxide is 1:0.1 and titanium dioxide to 2-propanol is 1:0.8.