▎ 摘　　要

NOVELTY - Graphene oxide is ultrasonically dispersed in deionized water at 80-100 KHz for 20-40 minutes, to obtain a uniform graphene oxide solution with a concentration of 4-8 mg/L. A sodium-tellurium hydride solution is added, stirred at 200-250 rpm, reacted for 1-3 hours, filtered, and separated to obtain a solid. The solid is washed with sodium borohydride aqueous solution 21 times and deionized water 5 times, and filtered. The obtained solid is washed, dried at 40-50 degrees C for 9-11 hours, and ground to obtain graphene powder. USE - Reduction of graphene oxide to prepare graphene. ADVANTAGE - The method enables simple, easy, economical, quick and nontoxic reduction of graphene oxide to graphene, by eliminating the usage of hydrazine hydrate and other toxic catalyst, under mild conditions. No special equipment is required. The obtained graphene has high quality. DETAILED DESCRIPTION - Graphene oxide is ultrasonically dispersed in deionized water at 80-100 KHz for 20-40 minutes, to obtain a uniform graphene oxide solution with a concentration of 4-8 mg/L. A sodium-tellurium hydride solution is added, stirred at 200-250 rpm, reacted for 1-3 hours, filtered, and separated to obtain a solid. The solid is washed with sodium borohydride aqueous solution 21 times and deionized water 5 times, and filtered. The obtained solid is washed, dried at 40-50 degrees C for 9-11 hours, and ground to obtain graphene powder. The mass ratio of sodium-tellurium hydride aqueous solution and graphene oxide aqueous solution is (2.9-6.9):1.