Nickel sulfide nanosheet/carbon quantum dot composite material and preparation method and application thereof
A technology of carbon quantum dots and composite materials, which is applied in the field of nickel sulfide nanosheets/carbon quantum dot composite materials, to achieve the effects of low production cost, simple control, and improved rate performance and cycle performance
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Embodiment 1
[0034] 1. At room temperature, foam nickel (size: 1*4cm 2 ) into a beaker, followed by ultrasonication with acetone, 0.5mol / L hydrochloric acid, distilled water, and dehydrated ethanol for 20 minutes, dried and weighed for later use;
[0035] 2. Add 5mmol of nickel nitrate and 10mmol of hexamethylenetetramine into 35mL of deionized water and stir for 10min to obtain a mixed solution;
[0036] 3. Put nickel foam (size: 1*4cm 2 ) after immersing in the mixed solution obtained in step 2, ultrasonically for 30 minutes, take out the magnet, and then transfer the above mixed solution and nickel foam to a polytetrafluoroethylene reactor; the reactor is sealed and placed in a blast drying oven, and the reaction condition is 100°C , the reaction time is 10 hours;
[0037] 4. After stopping the reaction and cooling down naturally, take out the sample in the reactor, wash it with a large amount of water, transfer 30mL of 0.1mol / L sodium sulfide solution and nickel foam to the polytetra...
Embodiment 2
[0040] 1. At room temperature, foam nickel (size: 1*4cm 2 ) into a beaker, followed by ultrasonication with acetone, 0.5mol / L hydrochloric acid, distilled water, and absolute ethanol for 20 minutes, dried and weighed for later use;
[0041] 2. Add 5 mmol of nickel nitrate and 10 mmol of hexamethylenetetramine to 35 mL of 1 mg / mL carbon quantum dot mixed solution and stir for 10 minutes to obtain a carbon quantum dot / nickel hydroxide mixture precursor solution;
[0042] 3. Put nickel foam (size: 1*4cm 2 ) after immersing in the carbon quantum dot / nickel hydroxide mixture precursor solution obtained in step 2, ultrasonically for 30 minutes, the magneton was taken out, and then the above-mentioned mixed solution and nickel foam were transferred to a polytetrafluoroethylene reactor; the reactor was sealed and placed in Blast drying oven, react at 100°C for 10 hours;
[0043] 4. After stopping the reaction and cooling down naturally, take out the sample in the reactor, wash it wi...
Embodiment 3
[0047] 1. At room temperature, foam nickel (size: 1*4cm 2 ) into a beaker, followed by ultrasonication with acetone, 0.5mol / L hydrochloric acid, distilled water, and absolute ethanol for 20 minutes, dried and weighed for later use;
[0048] 2. Add 5 mmol of nickel chloride and 10 mmol of hexamethylenetetramine to 35 mL of 1.5 mg / mL carbon quantum dot mixed solution and stir for 10 minutes to obtain a carbon quantum dot / nickel hydroxide mixture precursor solution;
[0049] 3. Put nickel foam (size: 1*4cm 2 ) after immersing in the carbon quantum dot / nickel hydroxide mixture precursor solution obtained in step 2, ultrasonically for 30 minutes, the magneton was taken out, and then the above-mentioned mixed solution and nickel foam were transferred to a polytetrafluoroethylene reactor; the reactor was sealed and placed in Blast drying oven, react at 120°C for 8 hours;
[0050] 4. After stopping the reaction and cooling down naturally, take out the sample in the reactor, wash it ...
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