▎ 摘　　要

NOVELTY - A porous niobium carbide MXene/reduced graphene oxide-based heating table comprises transparent table board and table legs for supporting the transparent table board and electric heating plate parallel to the transparent table board. The electric heating plate is arranged under the transparent table. The electric heating plate comprises upper glass plate, porous niobium carbide MXene/reduced graphene oxide-based heating film and lower glass plate in order from top to bottom. The porous niobium carbide MXene/reduced graphene oxide-based heating film comprises transparent insulating layer (A), porous niobium carbide MXene/reduced graphene oxide-based conductive film, transparent insulating layer (B) and electrode. The transparent insulating layer (A) covers one side of the porous niobium carbide MXene/reduced graphene oxide-based conductive film and transparent insulating layer (B) covers the other side of the porous niobium carbide MXene/reduced graphene oxide-based conductive film. USE - Porous niobium carbide MXene/reduced graphene oxide-based heating table. ADVANTAGE - The porous niobium carbide MXene/reduced graphene oxide-based heating table has excellent antibacterial and heat preservation effects on surface of transparent table board, radiant heating on the surrounding of the transparent table board with high electric-heat conversion rate, reliable safety, stable power for long-term use and uniform heat generation. DETAILED DESCRIPTION - A porous niobium carbide MXene/reduced graphene oxide-based heating table, comprises transparent table board and table legs for supporting the transparent table board and electric heating plate parallel to the transparent table board. The electric heating plate is arranged under the transparent table and connected to legs of the table. The electric heating plate comprises upper glass plate, porous niobium carbide MXene/reduced graphene oxide-based heating film and lower glass plate in order from top to bottom. The porous niobium carbide MXene/reduced graphene oxide-based heating film comprises transparent insulating layer (A), porous niobium carbide MXene/reduced graphene oxide-based conductive film, transparent insulating layer (B) and electrode. The transparent insulating layer (A) covers one side of the porous niobium carbide MXene/reduced graphene oxide-based conductive film and transparent insulating layer (B) covers the other side of the porous niobium carbide MXene/reduced graphene oxide-based conductive film, and one end of electrode is electrically connected to the porous niobium carbide MXene/reduced graphene oxide-based conductive film, and other end of electrode extends outside the transparent insulating layer (A) or transparent insulating layer (B). The porous niobium carbide MXene/reduced graphene oxide-based conductive film is prepared by grinding graphite powder and niobium aluminum carbide powder in mass ratio of 1-8:1 to fineness of 200 mesh or more, and pressing to form working electrode, fixing the working electrode in electrolytic cell, adding electrolyte to electrolytic cell so that the working electrode is immersed in the electrolyte, electrolyzing using fluorine-containing anion liquid as electrolyte and working electrode as a positive electrode under voltage supply to ionize the fluorine-containing anion liquid to generate fluorine radicals, centrifuging electrolyte to collect the precipitate to obtain the niobium carbide/graphite oxide material, dissolving niobium carbide/graphite oxide material in isopropanol according to the mass-volume ratio of 50-500 mg/ml, ultrasonically processing, centrifuging at 8000-15000 rpm for 10-30 minutes, collecting the precipitate, immersing the precipitate in reducing reagent to reduce, centrifuging, collecting the precipitate, drying, dispersing precipitate in dispersant (A), ultrasonically dispersing in water bath to obtain dispersion, preparing particulate resin slurry by mixing particulate powder with particle size of 0.1-1 mu m and dispersant (B), stirring to form particulate resin slurry containing 10-100 mg/mL particulate powder and 50-500 mg/mL resin, mixing particulate resin slurry, niobium carbide MXene/reduced graphene oxide dispersion, polyacrylonitrile-maleic anhydride copolymer and stabilizer in mass ratio of 500:1000-10000:1-50:5-20, transferring to protective gas environment, stirring at 65-85 degrees C until the volume is concentrated to 1/2-1/6 to obtain porous niobium carbide MXene/graphene oxide-based conductive ink, forming conductive film using porous niobium carbide MXene/reduced graphene oxide-based conductive ink by scraping and printing, immersing the film in dilute acid solution, washing and drying. The niobium aluminum carbide powder is Nb3AlC2 or Nb4AlC3 powder, and the particulate powder is carbonate powder or metal oxide powder.