▎ 摘　　要

NOVELTY - Quaternary multi-functional magnetic nano-composition material comprises nano-titania, urea, graphene and ferrosoferric oxide. USE - Used as quaternary multi-functional magnetic nano-composition material. ADVANTAGE - The material is economical, recovered under the applied magnetic field, facilitates recycling of the photocatalyst and avoiding the loss of nano-particles, reduces small particles agglomeration and degradation and improves the ability of storing and charging. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing quaternary multi-functional magnetic nano-composition material, comprising (i) taking graphene, dissolving in deionized water and performing ultrasonic dispersion to obtain a dispersion; (ii) taking nano-sized titanium dioxide, urea and ferroferric oxide, adding the above dispersion solution simultaneously and performing ultrasonic mixing to obtain a mixed solution; (iii) transferring the above mixed solution into a high-pressure reactor and drying for a period of time; (iv) centrifuging the mixture after reaction, washing the precipitate, repeating centrifugation and washing for many times to remove unreacted material; and (v) collecting precipitate from the last centrifugation and drying at a constant temperature into a powder.