Preparation method and application of graphene oxide-carbon black molded material
A molding material, graphene technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of unfavorable recycling of heavy metal pollutant adsorbents, lack of mature molding technology, etc., to achieve Significant economic and environmental benefits, low cost of raw materials, and controllable process conditions
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Embodiment 1
[0023] The preparation method of the graphene oxide-carbon black molding material of the present embodiment may further comprise the steps:
[0024] 1) Preparation of graphene oxide-carbon black mixed dispersion: first prepare a graphene oxide dispersion with a concentration of 1 mg / mL, use water as the dispersion medium, and ultrasonically treat it for 4 hours; The EC-600 carbon black of mesh sieve, the mass ratio of graphene oxide and carbon black is 1:0.5, ultrasonic stirring 4h, obtains mixed system A;
[0025] 2) Preparation of graphene oxide-carbon black microspheres: Spray-dry the mixed system A, the spray drying inlet temperature is 180°C, the outlet temperature is 70°C, the feed rate is 15r / min, and the dried product is graphene oxide- carbon black microspheres;
[0026] 3) Prepare graphene oxide-carbon black-PEI mixed slurry: add 0.1% PEI aqueous solution, graphene oxide-carbon black microspheres and The mass ratio of PEI aqueous solution is 1:10, and it is dispers...
Embodiment 2
[0029] The preparation method of the graphene oxide-carbon black molding material of the present embodiment may further comprise the steps:
[0030] 1) Preparation of graphene oxide-carbon black mixed dispersion: first prepare a graphene oxide dispersion with a concentration of 2 mg / mL, use water as the dispersion medium, and ultrasonically treat it for 4 hours; The EC-600 carbon black of mesh sieve, the mass ratio of graphene oxide and carbon black is 1:1, ultrasonic stirring 4h, obtain mixed system A;
[0031] 2) Preparation of graphene oxide-carbon black microspheres: Spray-dry the mixed system A, the spray drying inlet temperature is 200°C, the outlet temperature is 75°C, the feed rate is 20r / min, and the dried product is graphene oxide- carbon black microspheres;
[0032] 3) Prepare graphene oxide-carbon black-PEI mixed slurry: add 2% PEI aqueous solution, graphene oxide-carbon black microspheres and The mass ratio of PEI aqueous solution is 1:10, and disperse at a high...
Embodiment 3
[0035] The preparation method of the graphene oxide-carbon black molding material of the present embodiment may further comprise the steps:
[0036] 1) Preparation of graphene oxide-carbon black mixed dispersion: first prepare a graphene oxide dispersion with a concentration of 3 mg / mL, use water as the dispersion medium, and ultrasonically treat it for 4 hours; The EC-600 carbon black of mesh sieve, the mass ratio of graphene oxide and carbon black is 1:2, ultrasonic stirring 4h, obtain mixed system A;
[0037] 2) Preparation of graphene oxide-carbon black microspheres: Spray-dry the mixed system A, the spray drying inlet temperature is 230°C, the outlet temperature is 80°C, the feed rate is 25r / min, and the dried product is graphene oxide- carbon black microspheres;
[0038] 3) Prepare graphene oxide-carbon black-PEI mixed slurry: add 5% PEI aqueous solution, graphene oxide-carbon black microspheres and The mass ratio of PEI aqueous solution is 1:10, and disperse at a high...
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