▎ 摘　　要

NOVELTY - Preparation of nitrogen-sulfur co-doped graphene multi-walled carbon nanotube composite film involves dispersing graphite oxide and sodium alginate in ultrapure water by strong ultrasound to obtain mixture, measuring multi-walled carbon nanotube slurry, adding to mixture and applying strong ultrasound, starting vacuum filtration to obtain graphite oxide multi-walled carbon nanotube composite film, which is immersed in calcium chloride solution, peeling off graphite oxide multi-walled carbon nanotube composite film and drying at room temperature, adding thiourea solution and ethylenediamine to polytetrafluoroethylene lining, placing dried graphite oxide multi-walled carbon nanotube composite film on top of built-in polytetrafluoroethylene column in reactor, closing reactor and placing in oven to obtain nitrogen-sulfur co-doped graphene multi-walled carbon nanotube composite film, and washing the composite film with ultrapure water and absolute ethanol and drying at room temperature. USE - Preparation of nitrogen-sulfur co-doped graphene multi-walled carbon nanotube composite film. ADVANTAGE - The method provides the nitrogen-sulfur co-doped graphene multi-walled carbon nanotube composite film with high mechanical toughness and three-dimensional perlite-like structure.