▎ 摘　　要

NOVELTY - Preparing metal-graphene oxide-based composite catalyst, involves uniformly mixing the nano semiconductor and the graphene oxide solution to obtain a semi-finished product composite base solution. The semi-finished product composite base solution is placed into a photoreactor, added a sacrificial reagent, stirred in the whole process and introduced gas, and irradiated by a controlled light source to obtain a semiconductor-reduced graphene oxide composite base. The metal precursor solution is added into the semiconductor-reduced graphene oxide composite base to obtain a semi-finished catalyst. The semi-finished catalyst is irradiated by a controlled light source to obtain metal-graphene oxide-based composite catalyst with regular shape and exposed specific crystal face. USE - Method for preparing metal- graphene oxide-based composite catalyst used in chemical industry, energy, environment and biomedicine. ADVANTAGE - The composite catalyst has specific crystal face and shape, and is uniformly dispersed. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a metal-graphene oxide-based composite catalyst, which is prepared by synthesizing on reduced graphene oxide through controllable light deposition, uniformly dispersing on the reduced graphene oxide, and has regular shape and exposed crystal faces.