A kind of ordered mesoporous carbon material and preparation method thereof
A mesoporous carbon and composite material technology, applied in the field of mesoporous carbon materials, can solve the problems of poor controllability, complicated preparation process, easy preparation of non-ordered mesoporous carbon, etc., and achieve the effect of preventing channel collapse
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[0031] This embodiment provides an ordered mesoporous carbon material, the preparation method of which includes:
[0032] Step S1: mixing the silica / template composite material prepared by a nonionic surfactant with an acid solution and water to obtain a carbonized substrate,
[0033] Further, nonionic surfactants include nonionic surfactants containing only three elements of C, H, and O, and high carbon content. More preferably, nonionic surfactants are polyethylene oxide-polycyclic Propylene oxide-polyethylene oxide triblock copolymer (ie P123), its molecular formula is PEO-PPO-PEO. This nonionic surfactant acts as a template during the preparation of the silica / template composite.
[0034] Further, the mass ratio of the silica / template composite material to the acid solution and water is 1-1.5:0.1:10, or 1.1-1.4:0.1:10, or 1.2-1.3:0.1:10.
[0035] Further, the acid solution is a concentrated sulfuric acid solution or a mixed solution of concentrated sulfuric acid and phos...
Embodiment 1
[0055] This embodiment provides an ordered mesoporous carbon material, the preparation method of which comprises:
[0056] a. Preparation of silica / template composite:
[0057] Mix non-ionic surfactant P123, deionized water, hydrochloric acid and tetraethyl orthosilicate in a mass ratio of 2:15:60:4.25, stir at 40°C for 24h, then crystallize at 100°C for 48h, and then use Wash with ionic water until neutral, and dry at 80°C to obtain a white solid.
[0058] b. Carbonization process:
[0059] The obtained silica / template composite material was mixed with concentrated sulfuric acid (98%) and water according to the mass ratio of 1.5:0.1:10 to obtain a carbonized substrate, and then carbonized according to the following heating conditions:
[0060] The carbonized substrate was heated at 140°C for 1 hour in an air atmosphere, then raised to 330°C for 2 hours under a nitrogen atmosphere, then raised to 350°C for 2 hours, 400°C for 2 hours, 450°C for 2 hours, and 500°C for 7 hours....
Embodiment 2
[0069] This embodiment provides an ordered mesoporous carbon material, the preparation method of which comprises:
[0070] a. Preparation of silica / template composite:
[0071] Mix non-ionic surfactant P123, deionized water, hydrochloric acid and tetraethyl orthosilicate in a mass ratio of 2.5:15:60:4.25, stir at 40°C for 24h, then crystallize at 100°C for 48h, and then use Wash with ionic water until neutral, and dry at 80°C to obtain a white solid.
[0072] b. Carbonization process:
[0073] Mix the obtained silica / template composite with mixed acid (98% concentrated sulfuric acid and phosphotungstic acid at a mass ratio of 99:1), and water at a mass ratio of 1.5:0.1:10 to obtain a carbonized substrate. Carry out carbonization in accordance with the following heating conditions:
[0074] The carbonized substrate was heated at 150°C in an air atmosphere for 1h, then raised to 320°C and kept for 2h under a nitrogen atmosphere, then raised to 350°C for 2h, 400°C for 2h, 450°...
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