Two-dimensional nitrogen-doped porous carbon nanosheet and preparation method thereof
A technology of nitrogen-doped porous carbon and carbon nanosheets, which is applied in the manufacture of nano-carbon, hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as poor capacitance cycle stability, uneven mesopores, and easy agglomeration. Achieve good stability, promote uniform dispersion, and improve doping quality
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Embodiment 1
[0033] (1) Weigh 10 g of potassium citrate and put it into a corundum crucible, put the corundum crucible into a tube furnace, calcinate under the protection of an inert gas, raise the temperature to 850°C at a heating rate of 2°C / min, and keep it for 1h. After cooling down to room temperature naturally, the samples were collected by grinding with agate to obtain carbon nanosheets;
[0034] (2) adding the carbon nanomaterials prepared in step (1) to oxidation reaction in 500ml oxidizing acidic solution, the oxidizing acidic solution is configured by volume ratio of 1:1:1 by sulfuric acid, nitric acid and hydrogen peroxide, after the reaction is completed, wash, Wash and centrifuge twice with deionized water and ethanol respectively, and dry in a vacuum oven at 60°C for 12 hours to obtain porous carbon nanosheets;
[0035](3) Weigh 10 mg of the porous carbon nanomaterial prepared in step (2) and 10 mg of sodium dodecylbenzenesulfonate and add it to 200 ml of deionized water, co...
Embodiment 2
[0039] (1) Weigh 12 g of potassium citrate and put it into a corundum crucible, put the corundum crucible into a tube furnace, calcinate under the protection of an inert gas, raise the temperature to 850°C at a heating rate of 2°C / min, and keep it for 1h. After cooling down to room temperature naturally, the samples were collected by grinding with agate to obtain carbon nanosheets;
[0040] (2) Add the carbon nanomaterials prepared in step (1) into 450ml oxidative acidic solution for oxidation reaction. The oxidative acidic solution is configured by sulfuric acid, nitric acid and hydrogen peroxide in a volume ratio of 2:0.5:2. After the reaction, wash , washed and centrifuged twice with deionized water and ethanol respectively, and dried in a vacuum oven at 60°C for 12 hours to obtain porous carbon nanosheets;
[0041] (3) Weigh 20 mg of the porous carbon nanomaterial prepared in step (2) and 10 mg of sodium dodecylbenzenesulfonate and add it to 200 ml of deionized water, cont...
Embodiment 3
[0044] (1) Weigh 8 g of potassium citrate and put it into a corundum crucible, put the corundum crucible into a tube furnace, calcinate under the protection of an inert gas, raise the temperature to 850°C at a heating rate of 2°C / min, and keep it for 1h. After cooling down to room temperature naturally, the samples were collected by grinding with agate to obtain carbon nanosheets;
[0045] (2) Add the carbon nanomaterials prepared in step (1) into 550ml oxidative acidic solution for oxidation reaction, the oxidative acidic solution is configured by sulfuric acid, nitric acid and hydrogen peroxide in a volume ratio of 1:1:1, wash after the reaction , washed and centrifuged twice with deionized water and ethanol respectively, and dried in a vacuum oven at 60°C for 12 hours to obtain porous carbon nanosheets;
[0046] (3) Weigh 10 mg of the porous carbon nanomaterial prepared in step (2) and 20 mg of sodium dodecylbenzenesulfonate and add it to 200 ml of deionized water, continue...
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