▎ 摘　　要

NOVELTY - Preparation of graphene-carbon nanotube electrode involves mixing graphene oxide, ascorbic acid and deionized water to form aqueous graphene oxide solution, heating to obtain partially reduced aqueous graphene oxide solution, filtering partially reduced aqueous graphene oxide solution to obtain filter cake, mixing carbon nanotubes, concentrated sulfuric acid, and concentrated nitric acid, heating, diluting with deionized water to obtain acidified carbon nanotube aqueous solution, acidifying, filtering to obtain acidified carbon nanotube filter cake, mixing partially reduced oxidized carbene filter cake and the acidified carbon nanotube filter cake using planetary mixer to obtain graphene oxide-carbon nanotube ink, feeding graphene oxide-carbon nanotube ink into syringe of three-dimensional printer, performing three-dimensional printing on glass sheet to obtain graphene oxide-carbon nanotube hydrogel, freeze-drying to obtain graphene oxide-carbon nanotube aerogel and calcining. USE - Preparation of graphene-carbon nanotube electrode for aqueous electro-catalysis process (all claimed). ADVANTAGE - The prepared electrode has high strength, high conductivity, high flexural strength and many micro holes. DETAILED DESCRIPTION - Preparation of graphene-carbon nanotube electrodes involves mixing graphene oxide, ascorbic acid and deionized water to form aqueous graphene oxide solution, heating to 10-100 degrees C for 0.1-3 hours to obtain partially reduced aqueous graphene oxide solution, filtering partially reduced aqueous graphene oxide solution to obtain filter cake, mixing carbon nanotubes, concentrated sulfuric acid, and concentrated nitric acid, heating to 10-100 degrees C for 0.1-3 hours, diluting with deionized water to obtain acidified carbon nanotube aqueous solution, acidifying, filtering to obtain acidified carbon nanotube filter cake, mixing partially reduced oxidized carbene filter cake and the acidified carbon nanotube filter cake using planetary mixer to obtain graphene oxide-carbon nanotube ink, feeding graphene oxide-carbon nanotube ink into syringe of three-dimensional printer, performing three-dimensional printing on glass sheet as a substrate to obtain three-dimensional graphene oxide-carbon nanotube hydrogel, freeze-drying for 1-48 hours to obtain graphene oxide-carbon nanotube aerogel and calcining at high temperature under inert gas.