▎ 摘　　要

NOVELTY - A photocatalyst comprises copper(I)oxide and titanium dioxide comprising rutile and anatase titanium dioxide supported on reduced graphene oxide substrate. Copper(I) oxide has peaks corresponding to 2( theta ) of 29.58, 36.23, 42.52, 52.60, 59.66, 73.35 and 77.79, rutile titanium dioxide has peaks corresponding to 2( theta ) of 27.61, 35.68, 41.48, 44.32 and 56.75, and anatase titanium dioxide has peaks corresponding to 2( theta ) of 25.54, 37.96, 48.22, 54.42, 55.39, 62.94, 64.30, 69.14, 70.30, 75.34 and 76.11. The loading amount of copper is 1.0 wt% with respect to titanium dioxide. USE - Photocatalyst used for generating hydrogen (claimed). ADVANTAGE - The photocatalyst generates hydrogen at enhanced rate in the presence of visible light. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of photocatalyst, which involves (a) hydrolyzing a precursor of titanium dioxide using at least one acid with continuous stirring to obtain a gel containing hydrolyzed precursor of titanium dioxide, (b) peptizing gel containing hydrolyzed precursor of titanium dioxide at a temperature of 60-70 degrees C for a time period of 15-25 hours to obtain a suspension, (c) filtering suspension to obtain a residue and washing residue using at least one alcohol to obtain a washed residue, (d) drying washed residue at a temperature of 90-110 degrees C for a time period of 2-4 hours, under vacuum to obtain a powder and calcining powder at a temperature of 300-500 degrees C for a time period of 1-3 hours to obtain titanium dioxide nanoparticles, (e) loading titanium dioxide nanoparticles onto a graphene oxide substrate and dispersing graphene oxide loaded with titanium dioxide in an aqueous solution comprising at least one copper salt to obtain a mixture, and (f) sonicating mixture for a time period of 50-80 minutes and then calcining temperature of 450-550 degrees C for a time period of 4-6 hours; and (2) generation of hydrogen using photocatalyst, which involves dispersing photocatalyst in aqueous medium comprising polyol in a reactor vessel and stirring in the absence of light to obtain a stirred medium and purging an inert gas into stirred medium to obtain a purged medium free of oxygen and illuminating the medium free of oxygen.