Method for preparing high-purity graphene
A graphene, high-purity technology, applied in the field of high-purity preparation of graphene, can solve the problems of restricting general use, low yield, restricting commercial application, etc., and achieve mature process control technology, huge application prospects, and simple manufacturing process Effect
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Embodiment 1
[0021] 1) Grinding and sieving the graphite respectively to obtain graphite powder with an average particle size of 210 μm;
[0022] 2) Weigh the graphite powder and oxalic acid solution according to the weight ratio of 1:1.5, transfer them to a ball mill tank, add deionized water as a mixed solvent, add grinding balls, and grind. The speed of the double planetary ball mill is 300rpm. For 6h, obtain carboxylated graphene turbid solution;
[0023] 3) The above-mentioned carboxylated graphene turbid liquid is subjected to ultrasonic oscillation in an ultrasonic device, and the ultrasonic oscillation time is 2h to obtain the carboxylated graphene suspension;
[0024] 4) the zinc chloride solution that the mass fraction is 10% is added in the above-mentioned carboxylated graphene suspension, wherein the mass ratio of zinc salt and carboxylated graphene is 30:1, stirs, obtains zinc salt and carboxylated graphene The mixed solution obtained above is filtered, and the filtrate is su...
Embodiment 2
[0027] 1) Grinding and sieving the graphite respectively to obtain graphite powder with an average particle size of 300 μm;
[0028] 2) Weigh the graphite powder and oxalic acid solution according to the weight ratio of 1:2, transfer them to a ball mill tank, add deionized water as a mixed solvent, add balls, and grind. The speed of the double planetary ball mill is 500rpm. For 6h, obtain carboxylated graphene turbid solution;
[0029] 3) The above-mentioned carboxylated graphene turbid liquid is subjected to ultrasonic oscillation in an ultrasonic device, and the ultrasonic oscillation time is 2h to obtain the carboxylated graphene suspension;
[0030] 4) the zinc chloride solution that the mass fraction is 20% is added in the above-mentioned carboxylated graphene suspension, wherein the mass ratio of zinc salt and carboxylated graphene is 60:1, stirs, obtains zinc salt and carboxylated graphene The mixed solution obtained above is filtered, and the filtrate is subjected to ...
Embodiment 3
[0033] 1) Grinding and sieving the graphite respectively to obtain graphite powder with an average particle size of 320 μm;
[0034] 2) Weigh the graphite powder and oxalic acid solution according to the weight ratio of 1:3, transfer them to a ball mill tank, add deionized water as a mixed solvent, add grinding balls, and grind. The speed of the double planetary ball mill is 800rpm. For 8h, obtain carboxylated graphene turbid solution;
[0035] 3) The above-mentioned carboxylated graphene turbid liquid is subjected to ultrasonic oscillation in an ultrasonic device, and the ultrasonic oscillation time is 4h to obtain the carboxylated graphene suspension;
[0036] 4) the zinc sulfate solution that mass fraction is 15% joins in above-mentioned carboxylated graphene suspension, wherein the mass ratio of zinc salt and carboxylated graphene is 80:1, stirs, obtains the mixture of zinc salt and carboxylated graphene Mixed solution; filtering the mixed solution obtained above, and sub...
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