▎ 摘　　要

NOVELTY - Preparing carbon nanotube/graphene foam comprises e.g. preparing acidified carbon nanotube by weighing 1 g pyrolytic carbon nanotubes (PCNTs) into 250 ml single-necked flask, measuring the 120 ml mixed acid solution, adding to single mouth flask in ultrasonic dispersion with the frequency of 60KHz for 15 minutes, placing singlemouth flask on a magnetic stirrer, heating, reacting in 40-60 degrees C bath, refluxing for 3-8 hours, using PP micro-porous filtering film of 0.45 mu m, washing de-ionized water until the filtrate is neutral, vacuum drying at 80 degrees C for 24 hours to obtain acidified carbon nano-tube (CNTs- COOH4h), (2) preparing graphene oxide under the ice water bath of 0 degrees C, slowly adding the 5 g flake graphite into three-mouth flask of 120 ml of concentrated sulfuric acid in stirring, continuously stirring for half an hour, slowly adding potassium permanganate 18 g, continuously maintaining 0 degrees C, stirring for half an hour under stirring. USE - The method is useful for preparing carbon nanotube/graphene foam. DETAILED DESCRIPTION - Preparing carbon nanotube/graphene foam comprising (1) preparing acidified carbon nanotube by weighing 1 g pyrolytic carbon nanotubes (PCNTs) into 250 ml single-necked flask, measuring the 120 ml mixed acid solution, adding to single mouth flask in ultrasonic dispersion with the frequency of 60KHz for 15 minutes, placing singlemouth flask on a magnetic stirrer, heating, reacting in 40-60 degrees C bath, refluxing for 3-8 hours, using PP micro-porous filtering film of 0.45 mu m, washing de-ionized water until the filtrate is neutral, vacuum drying at 80 degrees C for 24 hours to obtain acidified carbon nano-tube (CNTs- COOH4h), (2) preparing graphene oxide under the ice water bath of 0 degrees C, slowly adding the 5 g flake graphite into three-mouth flask of 120 ml of concentrated sulfuric acid in stirring, continuously stirring for half an hour, slowly adding potassium permanganate 18 g, continuously maintaining 0 degrees C, stirring for half an hour under stirring, stirring for 2 hours at the temperature not greater than 20 degrees C, stirring for 2 hours at then not greater than 35 degrees C, keeping the room temperature, adding de-ionized water until there is no sputtering phenomenon in three-mouth flask, continuously stirring for half an hour, adding 30% hydrogen peroxide solution, until the mixture becomes bright yellow and there is no bubble generated by black brown, settling and separating the mixture, removing the acid waste solution, dissolving with small amount of graphene oxide, adding 5-10 % hydrochloric acid solution to fully wash the mixture until there is no S042-generated, adding into the mixture of graphite oxide hydrochloric acid after washing, adding ammonia water until the pH value is neutral, using de-ionized water and washing until no precipitate appears by checking silver nitrate solution, washing to neutral product sedimentation separation or centrifugal solid-liquid separation to obtain the graphite oxide, vacuum freezing graphite oxide and drying using drying device to obtain graphite oxide flocculent solid, taking the dried flocculent graphite oxide powder, dissolving in de-ionized water, stirring, adding into in an ultrasonic cleaner for ultrasonic treatment, (3) preparing carbon nano tube/graphene foam, using step (2) to obtain 10 mg/ml of oxidized graphene suspension 30 ml and step (1) to obtain the acidified carbon nano-tube mixing, stirring for 2 hours, processing for 2 hours to ultrasonic in the ultrasonic cleaning machine, adding solution into hydrothermal reaction kettle at 150-210?Oc, reacting for 12 hours, cooling hydrothermal reaction kettle to room temperature and taking out to obtain the carbon nano tube composite graphene hydrogel, placing carbon nano-tube composite graphene hydrogel in low temperature refrigerator at -50 degrees C pre-freezing hydrothermal reaction kettle for 2 hours, placing in the freezing dryer, freezing and drying for 3 days to obtain the carbon nano tube composite graphene aerogel, the ratio graphene oxide suspension and acidified carbon nano-tube with 1:1- 1:5, (4) adding the carbon nano-tube composite graphene aerogel obtained in the step (3) under the 900-1100 degrees C temperature in the tubular furnace heat treatment, removing the redundant oxygen-containing functional groups to obtain the carbon nano tube/graphene foam.