▎ 摘　　要

NOVELTY - Preparing rare earth oxide/graphene nanocomposite material comprises e.g. (i) loading rare earth oxide on graphene and target product, preparing aqueous solution containing desired amount of rare earth nitrate, adding 0.5-5 g/l graphene oxide dispersion liquid, (ii) adding organic fuel into dispersion obtained in step (i), stirring and sonicating for 15-90 minutes to obtain homogeneous dispersion liquid, (iii) heating the dispersion and concentrating to viscous, placing in furnace temperature at 300-900 degrees C, igniting, cooling to room temperature to obtain final product. USE - The method is useful for preparing rare earth oxide/graphene nanocomposite material (claimed). ADVANTAGE - The method has short time, high yield, low production cost; and is simple and suitable for industrial production. DETAILED DESCRIPTION - Preparing rare earth oxide/graphene nanocomposite material comprises (i) loading rare earth oxide on graphene and target product, preparing aqueous solution containing desired amount of rare earth nitrate, adding 0.5-5 g/l graphene oxide dispersion liquid, (ii) adding organic fuel into dispersion obtained in step (i), stirring and sonicating for 15-90 minutes to obtain homogeneous dispersion liquid, (iii) heating the dispersion and concentrating to viscous, placing in furnace temperature at 300-900 degrees C, igniting, cooling to room temperature to obtain final product, where in step (i), loading amount of rare earth oxide on the graphene is 20-100 wt.%; in step (i), the rare earth nitrate is yttrium nitrate, lanthanum nitrate, cerium nitrate, praseodymium nitrate, neodymium nitrate, samarium nitrate, europium nitrate, gadolinium nitrate, terbium nitrate, dysprosium nitrate, holmium nitrate, erbium nitrate, thulium nitrate, ytterbium nitrate or lutetium nitrate; in step (i), rare earth nitrate aqueous solution is prepared by dissolving rare earth nitrate in water or by heating nitric acid to dissolve the rare earth oxide, hydroxide, carbonate or bicarbonate, and then heating and removing excess nitric acid; in step (ii), organic fuel is glycine, urea or ethylene glycol; and addition amount of number of moles of organic fuel is 0.5-8 times the number of moles of rare earth nitrate.