Middle-pore carbon material and its preparation method
A technology of porous carbon and carbon coating, which is applied in chemical instruments and methods, carbon preparation/purification, and other chemical processes, and can solve problems such as limitations, high-temperature residual carbon rate, and failure of porous carbon to provide effective examples.
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Embodiment 1
[0076] 1) Nano magnesium oxide powder (specific surface area 369m 2 / g) 4.6g, resorcinol 1.4g, furfural 1.7g, ethanol 50mL, after mixing, carry out polymerization reaction at 90 ° C for 3 hours, after the reaction is completed, resin-coated magnesium oxide is obtained, and then it is dried;
[0077] 2) In an inert atmosphere, the resin-coated magnesia obtained in step 1) is heated from room temperature to 1000° C. for 3 hours at a heating rate of 5° C. / min to carbonize to obtain charcoal-coated magnesia;
[0078] 3) Remove the magnesium oxide template from the carbon-coated magnesium oxide obtained in step 2) with 1mol / L sulfuric acid, filter, wash the solid product with deionized water until neutral, and dry to obtain the mesoporous carbon provided by the present invention.
[0079] The BET specific surface area of the mesoporous carbon is 2618m 2 / g, nitrogen adsorption total pore volume 2.7cm 3 / g, t-map microporosity is less than 1%, the average pore diameter is 4.2nm,...
Embodiment 2
[0081] 1) Nano magnesium oxide powder (specific surface area 401m 2 / g) 5.2g, resorcinol 3.0g, mass percentage concentration is 3.2g of formaldehyde aqueous solution 37%, ethanol 45mL after mixing, carry out polymerization reaction at 90 ℃ for 3 hours, after the reaction is completed, resin-coated magnesium oxide is obtained. then dry it;
[0082] 2) In an inert atmosphere, the resin-coated magnesia obtained in step 1) is heated from room temperature to 1000° C. for 3 hours at a heating rate of 5° C. / min to carbonize to obtain charcoal-coated magnesia;
[0083] 3) Remove the magnesium oxide template from the carbon-coated magnesium oxide obtained in step 2) with 2mol / L hydrochloric acid, filter, and wash the solid product with deionized water until neutral. Dry to obtain mesoporous carbon.
[0084] The BET specific surface area of the mesoporous carbon is 1975m 2 / g, nitrogen adsorption total pore volume 2.4cm 3 / g, t-map microporosity is less than 1%, the average pore d...
Embodiment 3
[0086] 1) Nano magnesium oxide powder (specific surface area 401m 2 / g) 5.2g, resorcinol 3.0g, benzaldehyde 4.2g, ethanol 50mL and then carry out polymerization reaction at 90 ℃ for 3 hours, after the reaction is completed, resin-coated magnesium oxide is obtained, and then it is dried;
[0087] 2) In an inert atmosphere, the resin-coated magnesia obtained in step 1) is heated from room temperature to 1000° C. for 3 hours at a heating rate of 5° C. / min to carbonize to obtain charcoal-coated magnesia;
[0088] 3) Remove the magnesium oxide template from the carbon-coated magnesium oxide obtained in step 2) with 1 mol / L sulfuric acid, filter, and wash the solid product with deionized water until neutral. Dry to obtain mesoporous carbon.
[0089] The BET specific surface area of the mesoporous carbon is 1782m 2 / g, nitrogen adsorption total pore volume 1.6cm 3 / g, t-map microporosity is less than 5%, the average pore diameter is 3.7nm, and the most probable pore diameter is ...
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