▎ 摘　　要

Solar conversion of CO2, using a photocatalyst in the presence of water, has attained considerable attention due to added value of the process in terms of both reduction of an environmental pollutant and production of valuable synthetic chemicals. Room temperature fabrication of porous anodic alumina (PAA), for sufficiently low time, facilitates the synthesis of self-withstanding PAA with a middle layer of aluminum. Nanoporous reduced graphene oxide (RGO), deposited on the pore walls of PAA, with subsequent deposition of cadmium sulfide (CdS) as photocatalyst over it, and efficiently enhances the photocatalytic reduction of CO2. Morphological, structural and optical characterizations of the catalyst are executed using field emission scanning electron microscopy (FE-SEM), X-ray powder diffraction (XRD), electron dispersive X-spectroscopy (EDX) and UV-Vis absorption spectroscopy methods. Continuous photocatalytic reduction of CO2 was carried out using flat sheet reactors and a compound parabola as the solar reflector. Semiconducting CdS nanorods, grown over PAA support with conducting RGO, show enhanced photocatalytic reduction of CO2 to 153.8 mu mol/g/hr of CH3 OH with higher photocatalytic stability than CdS alone.