Nitrogen-doped mesoporous carbon supported metal catalyst as well as preparation method and application thereof
A metal-loaded, nitrogen-mesoporous technology, which is applied in the preparation of amino compounds, chemical instruments and methods, and the preparation of organic compounds, can solve the problems of unfavorable industrial production, aggregation of metal particles, and difficult operation, and achieve uniform dispersion. , High reactivity, high catalytic activity
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[0028] The invention provides a method for preparing a nitrogen-doped mesoporous carbon-supported metal catalyst, comprising the following steps:
[0029] 1) dissolving citric acid and magnesium nitrate in water to obtain a mixed solution, and evaporating the obtained mixed solution to obtain a transparent sol;
[0030] 2) foaming the transparent sol to obtain a xerogel foam;
[0031] 3) performing roasting treatment after refining the dry gel foam to obtain a roasted material;
[0032] 4) The obtained calcined material is acid-washed to remove magnesium to obtain a mesoporous carbon material;
[0033] 5) mixing nitrogen source, mesoporous carbon material and solvent, evaporating to dryness and roasting to obtain nitrogen-doped mesoporous carbon material;
[0034] 6) Mixing the nitrogen-doped mesoporous carbon material with metal particles, performing metal loading treatment, and further performing reduction treatment to obtain a nitrogen-doped mesoporous carbon-supported me...
Embodiment 1
[0058] 1) Dissolve citric acid monohydrate and magnesium nitrate hexahydrate in water to obtain a mixed solution, in which the concentrations of citric acid and magnesium nitrate are both 5mol / L, place the mixed solution in a water bath at 90°C for 3 hours, stir and evaporate to obtain a transparent Sol;
[0059] 2) Put the transparent sol in an oven at 140°C for foaming treatment for 4 hours to obtain dry gel foam;
[0060] 3) Grind the dry gel foam in a mortar, put it into a tube furnace, and carry out roasting treatment under a nitrogen atmosphere at a temperature of 800°C (heating rate of 2°C / min) for 2 hours to obtain a roasted material;
[0061] 4) Stir and reflux the obtained calcined material with 3 mol / L hydrochloric acid solution in a water bath at 65°C for 6 hours to remove MgO in the mixture, filter the product, wash with excess deionized water until neutral, and finally put it in an oven for Dry to obtain mesoporous carbon material;
[0062] 5) Take 8-hydroxyqu...
Embodiment 2
[0068] 1) Dissolve citric acid monohydrate and magnesium nitrate hexahydrate in water to obtain a mixed solution, in which the concentrations of citric acid and magnesium nitrate are both 5mol / L, place the mixed solution in a water bath at 90°C for 3 hours, stir and evaporate to obtain a transparent Sol;
[0069] 2) Put the transparent sol in an oven at 140°C for foaming treatment for 4 hours to obtain dry gel foam;
[0070] 3) Grind the dry gel foam in a mortar, put it into a tube furnace, and carry out roasting treatment under a nitrogen atmosphere at a temperature of 700°C (heating rate of 2°C / min) for 2 hours to obtain a roasted material;
[0071] 4) Stir and reflux the obtained calcined material with 3 mol / L hydrochloric acid solution in a water bath at 65°C for 6 hours to remove MgO in the mixture, filter the product, wash with excess deionized water until neutral, and finally put it in an oven for Dry to obtain mesoporous carbon material;
[0072] 5) Take 8-hydroxyqu...
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