A self-supporting three-dimensional porous carbon-selenium composite material and its preparation method and application
A three-dimensional porous and composite material technology, applied in the field of nano-biological materials and energy storage materials, can solve the problems of affecting the utilization rate of active materials, shortening the battery cycle life, and destroying the electrode structure, achieving excellent electrochemical performance, convenient processing, and raw materials Easy to get effect
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Embodiment 1
[0026] Step 1: Preparation of self-supporting three-dimensional porous carbon-selenium composites
[0027] S1. Bacillus subtilis was inoculated on NA medium, the formula of NA medium was peptone 10g / L, beef powder 3g / L, sodium chloride 5g / L, agar 15g / L, pH=7.3, cultured at 37°C for 48h. Subsequently, the Bacillus subtilis on the NA medium was transferred to the culture medium to continue to expand the culture, so that the number of bacterial groups reached 10 8 CFU / mL, the formula of the culture medium is glucose 20g / L, tryptone 10g / L, yeast extract 10g / L, potassium dihydrogen phosphate 1g / L, sodium chloride 5g / L, anhydrous magnesium sulfate 1g / L, pH=7.3.
[0028] S2. Using the carbonized melamine foam as a carrier, soak it in the culture solution of Bacillus subtilis, and let it stand for adsorption for 36 hours, so that the bacteria are fully attached to the three-dimensional porous carbon carrier.
[0029] S3, add sodium selenate solution in the Bacillus subtilis culture ...
Embodiment 2
[0036] Step 1: Preparation of self-supporting three-dimensional porous carbon-selenium composites
[0037] S1. Bacillus subtilis was inoculated on NA medium, and the formula of NA medium was peptone 12g / L, beef powder 1g / L, sodium chloride 4g / L, agar 12g / L, pH=7.4, cultured at 28°C for 24h. Subsequently, the Bacillus subtilis on the NA medium was transferred to the culture medium to continue to expand the culture, so that the number of bacterial groups reached 10 6 CFU / mL, the formula of the culture medium is glucose 25g / L, tryptone 15g / L, yeast extract 15g / L, potassium dihydrogen phosphate 5g / L, sodium chloride 5g / L, anhydrous magnesium sulfate 5g / L, pH=7.4.
[0038] S2. Using carbon cloth as a carrier, soak it in the culture solution of Bacillus subtilis and let it stand for adsorption for 12 hours, so that the bacteria are fully attached to the three-dimensional porous carbon carrier.
[0039] S3, add sodium selenate solution to the Bacillus subtilis culture fluid after s...
Embodiment 3
[0046] Step 1: Preparation of self-supporting three-dimensional porous carbon-selenium composites
[0047] S1. Inoculate Bacillus subtilis on NA medium, the formula of NA medium is peptone 1g / L, beef powder 1g / L, sodium chloride 0.1g / L, agar 1g / L, pH=7.0, culture at 35°C for 6h . Subsequently, the Bacillus subtilis on the NA medium was transferred to the culture medium to continue to expand the culture, so that the number of bacterial groups reached 10 10 CFU / mL, the formula of the culture medium is glucose 15g / L, tryptone 5g / L, yeast extract 5g / L, potassium dihydrogen phosphate 0.1g / L, sodium chloride 0.1g / L, anhydrous magnesium sulfate 0.1g / L, pH=7.0.
[0048] S2. Using the carbonized phenolic resin as a carrier, immerse it in the Bacillus subtilis culture solution, and let it stand for adsorption for 48 hours, so that the bacteria are fully attached to the three-dimensional porous carbon carrier.
[0049] S3. Add sodium selenite solution to the Bacillus subtilis culture...
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