Graphene oxide carboxyl functional modification method
A technology of carboxylation and functionalization, which is applied in the direction of chemical instruments and methods, inorganic chemistry, carbon compounds, etc., to achieve the effect of reducing hydroxyl and epoxy groups and increasing the degree of carboxylation
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Embodiment 1
[0035] This embodiment provides a kind of method of graphene oxide carboxyl functional modification, and this method is carried out according to the following steps:
[0036] Add 100mg of graphene oxide and 100mL of deionized water into a round bottom flask, and use an ultrasonic cell pulverizer to sonicate for 30 minutes at a power of 600W to obtain a uniform and stable graphene oxide aqueous dispersion. Under magnetic stirring, slowly add 1g of KOH to the dispersion, raise the temperature to 90°C and keep stirring for 1 hour, cool to room temperature and centrifuge at 9,000 rpm for 10 minutes, pour off the supernatant lye, and use the solid Wash with deionized water and filter with an aqueous membrane with a pore size of 0.45 μm. Repeat the washing and filtering for 5 times to remove the remaining KOH.
[0037]Gained reduced graphene oxide 40mg and 6mL concentrated sulfuric acid (mass concentration is 98%) are added round-bottomed flask, adopt the supersonic bath bath supers...
Embodiment 2
[0043] This embodiment provides a kind of method of graphene oxide carboxyl functional modification, and this method is carried out according to the following steps:
[0044] Add 100mg of graphene oxide and 100mL of deionized water into a round bottom flask, and use an ultrasonic cell pulverizer to sonicate for 30 minutes at a power of 600W to obtain a uniform and stable graphene oxide aqueous dispersion. Under magnetic stirring, slowly add 1g NaOH to the dispersion, raise the temperature to 40°C and keep stirring for 1 hour, cool to room temperature and centrifuge at 9000 rpm for 10 minutes, pour off the supernatant lye, and use the solid Wash with deionized water and filter with an aqueous membrane with a pore size of 0.45 μm. Repeat the washing and filtering for 5 times to remove the remaining NaOH.
[0045] Add 40 mg of the resulting reduced graphene oxide and 10 mL of deionized water into a round-bottomed flask, ultrasonically disperse it into a stable dispersion, and slo...
Embodiment 3
[0048] This embodiment provides a kind of method of graphene oxide carboxyl functional modification, and this method is carried out according to the following steps:
[0049] Add 100mg of graphene oxide and 100mL of deionized water into a round bottom flask, and use an ultrasonic cell pulverizer to sonicate for 30 minutes at a power of 600W to obtain a uniform and stable graphene oxide aqueous dispersion. Under magnetic stirring, slowly add 1g of CsOH to the dispersion, raise the temperature to 40°C and keep stirring for 0.5 hours, cool to room temperature and centrifuge at 9000 rpm for 10 minutes, pour off the supernatant lye, and use the solid Wash with deionized water and filter with an aqueous membrane with a pore size of 0.45 μm. Repeat the washing and filtering for 5 times to remove the remaining CsOH.
[0050] Add 40 mg of the resulting reduced graphene oxide and 6 mL of concentrated sulfuric acid (mass concentration is 98%) into a round-bottomed flask, and use an ultra...
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