▎ 摘　　要

NOVELTY - Preparing 3D-shaped hollow titanium nitride graphene comprises (i) taking polystyrene balls and adding concentrated sulfuric acid, immersing and stirring; (ii) washing the soaked polystyrene balls until neutral and freeze-drying to obtain sulfonated polystyrene balls; (iii) taking sulfonated polystyrene balls, adding anhydrous ethanol and dissolving to obtain solution; (iv) adding tetrabutyl titanate and deionized water into the solution and stirring; (v) centrifuging and cleaning the resulting solution, adding deionized water, stirring, dissolving to obtain solution A; (vi) adding graphene into deionized water and dispersing ultrasonically to obtain uniform solution B; (vii) mixing the solution A and solution B, stirring to obtain homogeneous solution and spray drying the solution to obtain powder; and (vii) transferring the powder into nitriding furnace, calcining, preheating under inert gas protection, preheating using nitrogen and ammonia, cooling to room temperature and nitriding. USE - The method is useful for preparing 3D-shaped hollow titanium nitride graphene. ADVANTAGE - The method is simple, easy and low cost and suitable for mass production. The graphene has high crystallinity. DETAILED DESCRIPTION - Preparing 3D-shaped hollow titanium nitride graphene comprises (i) taking polystyrene balls and adding concentrated sulfuric acid, immersing and stirring; (ii) washing the soaked polystyrene balls until neutral and freeze-drying to obtain sulfonated polystyrene balls; (iii) taking sulfonated polystyrene balls, adding anhydrous ethanol, dissolving completely to obtain solution; (iv) adding tetrabutyl titanate and deionized water into the solution and stirring; (v) centrifuging and cleaning the resulting solution, adding deionized water, stirring the solution thoroughly, dissolving completely to obtain solution A; (vi) adding graphene into deionized water, dispersing ultrasonically to obtain uniform solution B; (vii) mixing the solution A and solution B, stirring to obtain homogeneous solution and spray drying the solution to obtain powder; and (vii) transferring the powder into a nitriding furnace, calcining, preheating under inert gas protection, preheating using nitrogen and ammonia, cooling naturally to room temperature and nitriding.