Salvia splendens petal-based porous graphene-like carbon nanosheets as well as preparation method and application thereof
A technology of graphene and porous carbon, applied in the direction of nano-carbon, hybrid capacitor electrodes, etc., can solve the problems of cumbersome preparation process, etc., and achieve the effect of simple operation, avoiding corrosion, and short ion transmission path
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Embodiment 1
[0088] Wash a string of red petals with clean water to remove impurities, and after drying, crush them to 80 mesh with a pulverizer. Take 5g of a string of red petals powder and 15g of NaCl solids, add them to 50ml of water and mix evenly, heat and evaporate the water to dryness to obtain a string of red petals encapsulated by NaCl. Next, after placing the encapsulated sample in a high-temperature tube furnace, the N 2 Under the protection of 5℃·min -1 Raise the temperature to 800°C, carbonize at a constant temperature for 2 hours, take out the carbide at room temperature, and wash it with ultrapure water several times to NaCl. Finally, the product was dried to constant weight to obtain 1.01 g of a string of red petal-based graphene-like porous carbon nanosheets.
[0089] The prepared porous carbon nanosheets as figure 1 Shown has the graphene-like porous nanosheet structure, and the thickness of the prepared nanosheets is mostly concentrated in the range of 20-50nm; as f...
Embodiment 2
[0091] Wash a string of red petals with clean water to remove impurities, and after drying, crush them to 80 mesh with a pulverizer. Take 5g of a string of red petals powder and 15g of NaCl solids, add them to 50ml of water and mix evenly, heat and evaporate the water to dryness to obtain a string of red petals encapsulated by NaCl. Next, after placing the encapsulated sample in a high-temperature tube furnace, the N 2 Under the protection of 5℃·min -1 Raise the temperature to 700°C, carbonize at a constant temperature for 2 hours, take out the carbide at room temperature, and wash it with ultrapure water several times to NaCl. Finally, the product was dried to constant weight to obtain 1.15 g of a string of red petal-based graphene-like porous carbon nanosheets.
[0092] When the prepared porous carbon nanosheets are used as electrode materials for supercapacitors, at 0.5A g -1 Under the current density of , the specific capacitance of graphene-like carbon nanosheets is 32...
Embodiment 3
[0094] Wash a string of red petals with clean water to remove impurities, and after drying, crush them to 80 mesh with a pulverizer. Take 5g of a string of red petals powder and 15g of NaCl solid and add them to 100ml of water to mix evenly, heat and evaporate the water to dryness to obtain a string of red petals encapsulated by NaCl. Next, after placing the encapsulated sample in a high-temperature tube furnace, the N 2 Under the protection of 5℃·min -1 Raise the temperature to 900°C, carbonize at a constant temperature for 2 hours, take out the carbide at room temperature, and wash it with ultrapure water several times to NaCl. Finally, the product was dried to constant weight to obtain a string of red petal-based graphene-like porous carbon nanosheets of 0.83g
[0095] When the prepared porous carbon nanosheets are used as electrode materials for supercapacitors, at 0.5A g -1 The specific capacitance of graphene-like carbon nanosheets is 318F·g under the current density ...
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