▎ 摘　　要

NOVELTY - Preparation of high-efficiency graphene-based lanthanide nanocomposite material comprises placing graphite oxide in deionized water, ultrasonically dispersing to obtain graphite oxide dispersion solution, adding lanthanum nitrate and ammonium metavanadate, stirring, adding cerium nitrate, stirring, adjusting pH, hydrothermally reacting, suction filtering, washing, drying, and grinding. USE - The method is for preparation of high-efficiency graphene-based lanthanide nanocomposite material. ADVANTAGE - The nanocomposite material facilitates the transfer of electrons from cerium oxide and lanthanum vanadate to graphene sheet during photocatalytic degradation process, and has size of 5-50 nm and increased photocatalytic performance.