▎ 摘　　要

NOVELTY - A carbonitride derivative and a reduced graphene oxide composite preparing method involves preparing a graphene oxide homogeneous solution, preparing carbonitride derivative suspension, and preparing a carbonitride derivative and a reduced graphene oxide composite. USE - Method for preparing carbonitride derivative and a reduced graphene oxide composite that is utilized in dye-sensitized solar battery (claimed). ADVANTAGE - The carbonitride derivative and a reduced graphene oxide composite have better catalytic activity for iodine ion, and high photoelectric conversion efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a dye-sensitized solar battery.