A kind of graphitized carbon purification method
A graphitized carbon and composite carbon technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve problems such as difficulty in separating amorphous carbon, achieve excellent electromagnetic shielding performance, strong external destructive ability, and high energy density Effect
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Embodiment 1
[0024] 1. Dilute concentrated nitric acid to prepare 4 mol / L nitric acid solution;
[0025] 2. Soak 10 mg of one-dimensional composite carbon fiber in 25 mL of 4 mol / L nitric acid solution;
[0026] 3. Transfer the solution of the above step 2 to a 50 mL hydrothermal reaction kettle at a temperature of 170 °C, and react for 15 h. After the reaction kettle is cooled and filtered to obtain one-dimensional graphite carbon fibers;
[0027] 4. Wash the obtained one-dimensional graphite carbon fiber with distilled water and 95% alcohol for 3 times in sequence, after washing, the pH value is 6.5, and dry;
[0028] 5. Heat treatment at 500 °C for 30 min under the condition of vacuum degree -100torr while passing hydrogen / argon mixed gas through the dried one-dimensional graphite carbon fiber to remove the oxidized functional groups;
[0029] 6. Prepare a lithium ion electrode according to a conventional method: the prepared graphite carbon fiber is used as the working electrode, the ...
Embodiment 2
[0031] 1. Dilute concentrated nitric acid to prepare 6 mol / L nitric acid solution;
[0032] 2. Soak 10 mg of composite carbon nanofibers embedded with nickel particles in 20 mL of 6 mol / L nitric acid solution;
[0033] 3. Transfer the solution of the above step 2 to a 50 mL hydrothermal reaction kettle at a temperature of 150 °C, and react for 12 h. After the reaction kettle is cooled and filtered to obtain hollow carbon nanomaterials;
[0034] 4. The hollow carbon nanomaterials obtained were sequentially cleaned 3 times with distilled water and 95% alcohol, and the pH value after cleaning was 6.8, and dried;
[0035] 5. The dried hollow graphitized carbon nanomaterials are evacuated to a vacuum degree of -200 torr while being passed through a hydrogen / nitrogen gas mixture, and then heat-treated at 600 °C for 30 min to remove the oxidized functional groups;
[0036] 6. Prepare capacitor electrodes by conventional methods: use the prepared hollow graphitized carbon nanomateria...
Embodiment 3
[0038] 1. Dilute concentrated nitric acid to prepare 7 mol / L mixed acid, wherein the molar ratio of nitric acid to hydrochloric acid is 9.5:0.5;
[0039] 2. Soak 10 mg of two-dimensional composite carbon film in 25 mL of 7 mol / L mixed acid solution;
[0040] 3. Transfer the solution of the above step 2 to a 50 mL hydrothermal reaction kettle at a temperature of 180 °C, and react for 10 h. After the reaction kettle is cooled and filtered, a two-dimensional ultra-thin graphitized carbon film is obtained;
[0041] 4. The obtained two-dimensional ultra-thin graphitized carbon film is sequentially cleaned 3 times with distilled water and 95% alcohol, and the pH value is 6.5 after cleaning, and dried;
[0042] 5. The dried two-dimensional ultra-thin graphitized carbon film was evacuated to a vacuum degree of -300 torr while passing hydrogen / argon mixed gas, and then heat-treated at 700 °C for 30 min to remove impurity functional groups;
[0043] 6. Put the prepared material into wa...
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Abstract
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