A kind of carbon dots/chitosan/manganese dioxide energy storage material and preparation method thereof
A technology of manganese dioxide and energy storage material, applied in the field of composite materials, can solve the problems such as no relevant literature and patent reports, and achieve the effects of controllability and selectivity, mild conditions and convenient preparation process
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[0029] 1) Preparation of carbon dots / chitosan composite: Take 2-6g of chitosan solid powder, add it to a beaker, and inject 100-200mL of distilled water, and carry out magnetic stirring for about 24-72 hours. Add 0.1M-0.5M acetic acid solution dropwise at a rate of 1-2 drops per second to adjust the pH, so that the final pH of the solution is 5.3-5.7, and the chitosan is completely dissolved to obtain a solution with a mass concentration of 2-3g / mL. Then, take 30-50 mL of prepared chitosan solution, place it in a microwave oven of 800-1000W, take out the product after microwave treatment for 5-10 minutes, add 30-50 mL of distilled water, and carry out magnetic stirring for 10-12 hours. Finally, centrifuge the well-stirred carbon dot / chitosan solution at a centrifugal speed of 8000-10000 rpm for 10-20 minutes, and take the supernatant liquid after completion to prepare the carbon dot / chitosan composite;
[0030] 2) Preparation of electrodeposition solution: Weigh 3.16-15.8 g of...
Embodiment 1
[0034] 1) Preparation of carbon dots / chitosan composite: Take 2g of chitosan solid powder, add it to a beaker, and inject 100mL of distilled water, and carry out magnetic stirring for about 72 hours. During the stirring process, the speed is 1 drop per second 0.1M acetic acid solution was added dropwise to adjust the pH, so that the final pH of the solution was 5.3, and a solution with a mass concentration of 2 g / mL was obtained after the chitosan was completely dissolved. Then, take 50 mL of prepared chitosan solution, place it in an 800W microwave oven, take out the product after microwave treatment for 5 minutes, add 50 mL of distilled water, and carry out magnetic stirring for 10 hours. Finally, the fully stirred carbon dots / chitosan solution is centrifuged at a centrifugal speed of 8000 rpm for 10 minutes, and after completion, the supernatant liquid is taken to prepare the carbon dots / chitosan composite;
[0035] 2) Preparation of electrodeposition solution: 3.16 g of po...
Embodiment 2
[0042] 1) Preparation of carbon dots / chitosan composite: Take 6g of chitosan solid powder, add it to a beaker, and inject 200mL of distilled water, and carry out magnetic stirring for about 24 hours, at a rate of 2 drops per second during the stirring process 0.5 M acetic acid solution was added dropwise to adjust the pH, so that the final pH of the solution was 5.7, and a solution with a mass concentration of 3 g / mL was obtained after the chitosan was completely dissolved. Then, take 30 mL of prepared chitosan solution, place it in a 1000W microwave oven, take out the product after microwave treatment for 5 minutes, add 30 mL of distilled water, and carry out magnetic stirring for 12 hours. Finally, put the well-stirred carbon dots / chitosan solution into a high-speed centrifuge at a centrifugal speed of 8000 rpm for 20 minutes. After completion, take the supernatant liquid to prepare the carbon dots / chitosan complex ;
[0043] 2) Preparation of electrodeposition solution: 15...
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