▎ 摘　　要

NOVELTY - Preparing photocatalyst for selective photoconversion of carbon dioxide (CO2) comprises (i) preparing mixed solution by mixing a solvent, unsaturated fatty acid having 16-20C, amine-based compound of (R1NHR2) (I), a titania precursor, and a graphene oxide solution; (ii) calcining the mixed solution to obtain a calcined product; (iii) washing the calcined material; and (iv) obtaining a complex by performing a drying process, where composite includes graphene and nitrogen (N) doped titania (TiO2) quantum dots combined to form an integrated composite. USE - The method is useful for preparing photocatalyst for selective photoconversion of CO2. ADVANTAGE - The photocatalyst has excellent conversion rate, has high yield, can control the selectivity during light conversion of light and has excellent long-term stability. DESCRIPTION OF DRAWING(S) - The drawing shows TEM measurement image of the quantum dot (a) and the composite of example 3 (b-d).