METHOD FOR PURIFYING CARBON NANOTUBE FOR HYDROGEN STORAGE

摘要

PURPOSE: A method for purifying carbon nanotube for hydrogen storage is provided to improve storage capacity of hydrogen by purifying carbon nanotube using nitric acid, wherein the carbon nanotube is synthesized by thermal chemical vapor deposition using nickel catalyst. CONSTITUTION: The method for purifying carbon nanotube for hydrogen storage comprises the processes of preparing a mixture of nitric acid and carbon nanotube by uniformly mixing 4 to 9 moles of nitric acid with carbon nanotube in a weight ratio of 4:1; heating the mixture in the temperature range of a room temperature to 120 deg.C for 1 to 48 hours; cooling the heated mixture to a room temperature; and drying the carbon nanotube after obtaining carbon nanotube by filtering the mixture cooled to the room temperature using a polymer filter paper, wherein concentration of nitric acid is 6 to 7 moles, heating temperature is from 90 to 120 deg.C, and heating time is from 4 to 6 hours.