▎ 摘　　要

NOVELTY - Preparing carbon-based gas gel induced by carbon dots comprises e.g. (i) preparing the carbon dots using positively charged polymers e.g. as chitosan and polyethyleneimine as precursors, preparing by thermal sintering method and forming the carbon-based gas gel formed by the two through electrostatic self-assembly; (ii) preparing charged carbon dots; (iii) dissolving the reaction product prepared in the solvent e.g. deionized water, ethanol and N,N-dimethylformamide, filtering after the dissolution is completed, collecting the filtrate, dialyzing and freeze-drying to obtain the carbon dot powder; (iv) taking two-dimensional nano-carbon materials, the precursor of graphene or graphene oxide and graphitic carbon nitride, heating, if cell disruption is required and controlling the power of the cell disruption process; and (v) dissolving the carbon dot powder prepared and the two-dimensional nano-carbon material in water, stirring, mixing evenly, and freeze-drying. USE - The method is useful for preparing carbon-based gas gel induced by carbon dots is useful in catalysis, adsorption, and biomedicine. ADVANTAGE - The method: uses electrostatic attraction and hydrogen bond forces to prepare gels quickly and easily; does not use any toxic and harmful chemical cross-linking agent; and prepares carbon-based gas gel which is in low cost, ultra-light weight, rich pore structure, high repetition rate, stable chemical properties and easy to popularize. DETAILED DESCRIPTION - Preparing carbon-based gas gel induced by carbon dots comprises (i) preparing the carbon dots using positively charged polymers e.g. as chitosan and polyethyleneimine as precursors, preparing by thermal sintering method, the surface of carbon dots carries rich positive functional groups, the particle size is about 3-20 nm and the Zeta potential is positive, where the two-dimensional nanocarbon material can be graphene, graphene oxide and graphite phase carbon nitride, etc., and the Zeta potential is negative and the nanosheet size is between 100 nm and 2 µm and forming the carbon-based gas gel formed by the two through electrostatic self-assembly with a rich and disordered pore structure, the pore size is concentrated in the mesopore range of 10-100 nm and there is no chemical cross-linking agent involved, specifically comprises (ii) preparing charged carbon dots using positively charged polymers e.g. chitosan and polyethyleneimine as precursors by thermal sintering, cooling to room temperature and taking out the reaction product; (iii) dissolving the reaction product prepared in the solvent e.g. deionized water, ethanol and N,N-dimethylformamide, filtering after the dissolution is completed, collecting the filtrate, where the pore size of the microporous filter membrane is 100 nm-0.2 µm, dialyzing the filtrate for at least 24 hours, changing the water 3-5 times in the middle of the dialysis, adopting the molecular weight cut-off of the dialysis bag between 1-15 KDa, terminating dialysis, taking out the carbon dot aqueous solution and freeze-drying to obtain the carbon dot powder; (iv) taking two-dimensional nano-carbon materials can be graphene, graphene oxide, graphite phase carbon nitride, etc., the precursor of graphene or graphene oxide can be graphite, graphite oxide, ferrocene, 1,2,4-trichlorobenzene, and carbon-containing polymer materials, the precursor of graphitic carbon nitride can be urea, thiourea, melamine, dihydroamine, etc., if heating is required, the heating at 400-900℃ for 2-10 hours, if cell disruption is required, controlling the power of the cell disruption process at 300-800W, and the disruption time at 2-24 hours and the solvent is deionized water, ethanol or a mixture of many solvents; and (v) dissolving the carbon dot powder prepared and the two-dimensional nano-carbon material in water, stirring, mixing evenly, and freeze-drying.