▎ 摘　　要

NOVELTY - Method for preparing carbon nano-tubes by a hydrothermal method involves i. putting 1mg graphene oxide (GO) powder into 100ml deionized water, and carrying out ultrasonic treatment for 20 minutes to obtain a GO solution; ii. dripping 10 µl dilute hydrochloric acid into 20ml of GO solution obtained in the first step to obtain acidified GO solution, where the mass fraction of hydrogen chloride in the dilute hydrochloric acid is 0.1%; iii. placing the acidified GO solution obtained in the step two in a reaction kettle, and reacting at the temperature of 200 °C for 2 hours to obtain a carbon nano tube, the GO powder is graphene oxide powder, and the model is XF 002-2. USE - Method for preparing carbon nano-tubes by a hydrothermal method for use in the field of catalyst carriers and energy storage. ADVANTAGE - The preparation process is simple.