A kind of preparation method of glycine modified graphene oxide/graphite phase carbon nitride composite film
A technology of glycine and graphene, applied in the field of membrane separation, can solve the problems of membrane fouling and low rejection rate, achieve broad application prospects, improve nanofiltration performance, and excellent solute/solvent selectivity
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Embodiment 1
[0027] With glycine as modifier, graphene oxide as reactant, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI) / N-hydroxysuccinimide (NHS) For carboxyl activator.
[0028] Wherein, the preparation of the glycine solution is as follows: take 50 mg of glycine solid, add it into 50 mL of deionized water, and ultrasonically dissolve it to obtain a 1 mg / mL glycine solution.
[0029] The preparation of the EDCI solution is as follows: take 10 mg of EDCI solid, add it to 10 mL of deionized water, dissolve it with ultrasonic waves, and prepare it for immediate use.
[0030] The preparation of the NHS solution is as follows: 10 mg of NHS solid is dissolved in 20 mL of deionized water, dissolved by ultrasonic waves, and prepared immediately for use.
[0031] Add 2mL of graphene oxide solution with a concentration of 100ppm into 14mL of water, stir evenly, and ultrasonically dissolve to obtain a graphene oxide aqueous solution with uniform concentration, and then add 300...
Embodiment 2
[0039] With glycine as modifier, graphene oxide as reactant, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI) / N-hydroxysuccinimide (NHS) as a catalyst. Wherein, the preparation of glycine, EDCI and NHS solution is the same as in Example 1.
[0040] Add 2 mL of graphene oxide solution with a concentration of 100 ppm into 14 mL of water, stir evenly, add 300 μL of EDCI and 300 μL of NHS solution successively, react for 15 minutes, then add 0.6 mL of glycine solution dropwise, and continue stirring for 12 hours. After the reaction is finished, add 2 mL of g-C with a concentration of 200 ppm dropwise 3 N 4 Dispersion liquid, sonicated for 1 hour to obtain glycine-modified graphene oxide / g-C 3 N 4 Mix the dispersion.
[0041] Glycine modified graphene oxide / g-C 3 N 4 The mixed dispersion was placed in a suction filtration device, and suction filtration was performed under a pressure of 1 bar, and the glycine-modified graphene oxide / g-C 3 N 4 The composite...
Embodiment 3
[0044] With glycine as modifier, graphene oxide as reactant, 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI) / N-hydroxysuccinimide (NHS) as a catalyst. Wherein, the preparation of glycine, EDCI and NHS solution is the same as in Example 1.
[0045] Add 2 mL of graphene oxide solution with a concentration of 100 ppm into 14 mL of water, stir evenly, add 300 μL of EDCI and 300 μL of NHS solution successively, react for 15 minutes, then add 0.8 mL of glycine solution dropwise, and continue stirring for 12 hours. After the reaction is finished, add 2 mL of g-C with a concentration of 200 ppm dropwise 3 N 4 Dispersion liquid, sonicated for 1 hour to obtain glycine-modified graphene oxide / g-C 3 N 4 Mix the dispersion.
[0046] Glycine modified graphene oxide / g-C 3 N 4 The mixed dispersion was placed in a suction filtration device, and suction filtration was performed under a pressure of 1 bar, and the glycine-modified graphene oxide / g-C 3 N 4 The composite...
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