▎ 摘　　要

NOVELTY - The preparation method of three-dimensional tin-cobalt alloy catalytic graphene/titanium nitride/carbon nanotube composite material involves mixing citric acid, stannous chloride, cobalt nitrate and sodium chloride in deionized water, freeze-drying, grinding, heating under argon atmosphere, cooling, grinding, dispersing in deionized water, suction filtering, washing with deionized water, drying, purging with argon and acetylene gas mixture, rapidly heating, heat-preserving, maintaining argon gas flow rate and cooling to room temperature. USE - Preparation of three-dimensional tin-cobalt alloy catalytic graphene/titanium nitride/carbon nanotube composite material (claimed). ADVANTAGE - The method enables preparation of three-dimensional tin-cobalt alloy catalytic graphene/titanium nitride/carbon nanotube composite material with excellent electrical conductivity. DETAILED DESCRIPTION - The preparation method of three-dimensional tin-cobalt alloy catalytic graphene/titanium nitride/carbon nanotube composite material involves (1) mixing 0.0125-0.025 g/ml citric acid, 0.002-0.004 g/ml stannous chloride, 0.0006-0.002 g/ml cobalt nitrate and 0.18-0.22 g/ml sodium chloride in deionized water, freeze-drying the resultant solution to obtain a homogeneous mixture of solid material, grinding to obtain a homogeneous mixture, (2) placing the step (1) precursor sample in a tube furnace, heating at 400 degrees C at a rate of 5-10 degrees C/minute for 1-2 hours under argon atmosphere, cooling to room temperature, grinding to obtain brown powder, (3) dispersing the step (2) brown powder in deionized water to give suspension, suction filtering the suspension, obtaining a black substance, washing with deionized water until sodium chloride is completely removed, drying at 60-80 degrees C for 5-8 hours, obtaining a black powder, (4) placing the step (3) black powder in a tube furnace, purging with argon and acetylene gas mixture at a rate of 100-200 ml/minute, the mass ratio of argon and acetylene gas mixture is 95:5, rapidly heating at 600-750 degrees C, heat-preserving for 0.5-2 hours, maintaining argon gas flow rate at 100-200 ml/minute and cooling to room temperature.