Cobalt-nitrogen-sulfur co-doped carbon aerogel di-functional oxygen catalyst and preparation method and application thereof
A technology of nitrogen-sulfur co-doping and carbon airgel, which is applied in chemical instruments and methods, physical/chemical process catalysts, electrical components, etc., to achieve the effect of simple preparation method, low price and excellent activity
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Embodiment 1
[0029] (a) Preparation of dopamine / thiol / Co-SA airgel
[0030]Disperse a certain amount of SA in 200mL deionized water, heat and stir at 80°C for 8h to dissolve completely, and prepare an SA solution with a concentration of 40mg / mL; prepare 2.5g of cobalt chloride hexahydrate into an aqueous solution with a concentration of 0.02mol / L, Slowly add it dropwise to the SA solution during the stirring process, continue stirring for 4 hours, then centrifuge at 4000rpm for 10 minutes, collect the precipitate and redisperse it in 200mL deionized water, add 0.6g dopamine and 40mL mercaptan, stir and dissolve, transfer to the hydrothermal reaction kettle, Hydrothermal reaction at 100°C for 2 hours, the reaction solution was centrifuged and washed, then left to stand to obtain the dopamine / thiol / Co-SA hydrogel, which was frozen at minus 20°C in the refrigerator and then freeze-dried for 36 hours, the dopamine / thiol / Co -SA airgel.
[0031] (b) Preparation of Co / NSPC airgel bifunctional ox...
Embodiment 2
[0034] (a) Preparation of dopamine / thiol / Co-SA airgel
[0035] Disperse a certain amount of SA in 200mL deionized water, heat and stir at 80°C for 8h to dissolve completely, and prepare an SA solution with a concentration of 50mg / mL; prepare 2.5g of cobalt chloride hexahydrate into an aqueous solution with a concentration of 0.02mol / L, Slowly add it dropwise to the SA solution during the stirring process, continue stirring for 4 hours, then centrifuge at 4000rpm for 10 minutes, collect the precipitate and redisperse it in 200mL deionized water, add 0.6g dopamine and 40mL mercaptan, stir and dissolve, transfer to the hydrothermal reaction kettle, Hydrothermal reaction at 100°C for 2 hours, the reaction solution was centrifuged and washed, then left to stand to obtain the dopamine / thiol / Co-SA hydrogel, which was frozen at minus 20°C in the refrigerator and then freeze-dried for 36 hours, the dopamine / thiol / Co -SA airgel.
[0036] (b) Preparation of Co / NSPC airgel bifunctional o...
Embodiment 3
[0040] (a) Preparation of dopamine / thiol / Co-SA airgel
[0041] Disperse a certain amount of SA in 200mL deionized water, heat and stir at 80°C for 8h to dissolve completely, and prepare an SA solution with a concentration of 60mg / mL; prepare 2.5g of cobalt chloride hexahydrate into an aqueous solution with a concentration of 0.02mol / L, Slowly add it dropwise to the SA solution during the stirring process, continue stirring for 4 hours, then centrifuge at 4000rpm for 10 minutes, collect the precipitate and redisperse it in 200mL deionized water, add 0.6g dopamine and 40mL mercaptan, stir and dissolve, transfer to the hydrothermal reaction kettle, Hydrothermal reaction at 100°C for 2 hours, the reaction solution was centrifuged and washed, then left to stand to obtain the dopamine / thiol / Co-SA hydrogel, which was frozen at minus 20°C in the refrigerator and then freeze-dried for 36 hours, the dopamine / thiol / Co -SA airgel.
[0042] (b) Preparation of Co / NSPC airgel bifunctional o...
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