A kind of nitrogen-doped magnetic mesoporous carbon and its preparation method and application
A technology of nitrogen-doped mesoporous carbon and nitrogen doping, applied in chemical instruments and methods, other chemical processes, oxidized water/sewage treatment, etc., can solve the problem that the adsorption performance of magnetic mesoporous carbon materials needs to be improved and limits mesoporous carbon Issues such as expanding the application of materials
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[0037] The invention provides a method for preparing nitrogen-doped magnetic mesoporous carbon, comprising the following steps:
[0038] Mix melamine, formaldehyde, colloidal silica and water for polycondensation to obtain a melamine-formaldehyde resin-silica composite;
[0039] Carrying out carbonization treatment to the melamine formaldehyde resin-silicon dioxide composite to obtain a nitrogen-doped carbon-silicon dioxide composite;
[0040] Etching the nitrogen-doped carbon-silicon dioxide composite to obtain a nitrogen-doped mesoporous carbon material;
[0041] The nitrogen-doped mesoporous carbon material is mixed with an iron source for in-situ generation to obtain nitrogen-doped magnetic mesoporous carbon.
[0042] In the present invention, unless otherwise specified, the required preparation materials are commercially available products well known to those skilled in the art.
[0043] The invention mixes melamine, formaldehyde, colloidal silica and water for polycond...
Embodiment 1
[0075] Weigh 6.30g of melamine, add 10mL of formaldehyde (37wt%) and 25mL of distilled water, stir at 85°C for 20min, wait for the system to cool down to 40°C, add 60mL of silica gel solution (3.0g SiO 2 +60mL distilled water), while keeping stirring at 40°C, adjust the pH value of the reaction system to 4.5 with HCl (2mol / L), stop stirring, and let stand for 3h to obtain the melamine formaldehyde resin-silicon dioxide composite, and the melamine formaldehyde The resin-silica composite was washed successively with absolute ethanol and distilled water, filtered, and dried at 60°C. 2 Carbonize at 900°C for 2 hours under protection to obtain a nitrogen-doped carbon-silicon dioxide composite; weigh 2.5g of a nitrogen-doped carbon-silicon dioxide composite and put it into 100mL of 20% HF, stir for 1min, react at room temperature for 24h, and carry out Etched and dried to obtain a nitrogen-doped mesoporous carbon material, denoted as NMC. The specific surface area of the prepared...
Embodiment 2
[0081] Weigh 6.30g of melamine, add 10mL of formaldehyde (37wt%) and 25mL of distilled water, stir at 85°C for 20min, wait for the system to cool down to 40°C, add 60mL of silica gel solution (3.0gSiO 2 +60mL distilled water), while keeping stirring at 40°C, adjust the pH value of the reaction system to 4.5 with HCl (2mol / L), stop stirring, and let stand for 3h to obtain the melamine formaldehyde resin-silicon dioxide composite, and the melamine formaldehyde The resin-silica composite was washed successively with absolute ethanol and distilled water, filtered, and dried at 60°C; 2 Carbonize at 900°C for 2 hours under protection to obtain a nitrogen-doped carbon-silicon dioxide composite. Weigh 2.5g of the nitrogen-doped carbon-silicon dioxide composite and put it into 100ml of 20% HF. After stirring for 1 minute, react at room temperature for 24 hours. Etched and dried to obtain a nitrogen-doped mesoporous carbon material, denoted as NMC.
[0082] Weigh 4.0gFeCl 3 ·6H 2 O a...
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