It’s widely accepted that carbon dioxide accounts for the largest share of the anthropogenic greenhouse-gas emission. Not only the reduction of fossil-fuel consumption, but also CO₂ capturing and sequestration are needed to counter the inevitable threat. Unfortunately, most of the thermochemical processes for CO₂ valorization require extraneous energy input, which may result in the net growth of CO₂ emission. In this regard, photocatalytic conversion of CO₂ to hydrocarbons under solar excitation becomes a viable approach, to solve the energy and environmental crisis by recycling CO₂ to fuels. Bio-mimetic processes based on photosynthesis allowing simultaneous solar energy harvesting and CO₂ reductions thus become highly desirable. In this work, systematic investigation of GO for photocatalytic CO2 reduction process has been performed based on various GOs synthesized in different conditions. Quantitative and qualitative determinations of the methanol formation have performed by Gas chromatography (GC) and Gas chromatography–mass spectrometry (GC-MS). Photocatalytic conversion of carbon dioxide (CO2) to hydrocarbons such as methanol makes possible simultaneous solar energy harvesting and CO₂ reduction, two birds with one stone for the energy and environmental issues. This work describes a high photocatalytic conversion of CO₂ to methanol using graphene oxides (GOs) as a promising photocatalyst. Modified Hummer’s method has been applied to synthesize the GO based photocatalyst for the enhanced catalytic activity. Further, Cu and MoS2 nanoparticles and were deposited on GO as co-catalysts to enhanced the photocatalysis reaction. Not only methanol, but also acetaldehyde were detected. Total solar to fuel yield of 6.8 mole g-cat-1 h-1 have been achieved, which is 240 times enhancement relative to the commercial P-25 photocatalyst. Detailed preparation and characterization of the catalysts will be addressed.