Modified carbon-based material for catalyzing redox reaction, and preparation method and application thereof
A carbon-based material and technology of base materials, applied in the field of modified carbon-based material catalysts, can solve the problems of high cost and difficult recycling and regeneration of catalysts, and achieve high dispersion, improve redox efficiency, and be easy to separate, replace, and regenerate. Effect
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[0015] The invention provides a method for preparing a modified carbon-based material, comprising the following steps:
[0016] Step 1: Mechanically crush the carbon-containing raw materials, and then sieve to obtain particles with a particle size of 30-500 μm; carbonize the particles at a high temperature of 400-800°C for 0.3-8 hours, and then physically activate them at 600-950°C for 0.4-24 hours , to obtain carbon-based materials.
[0017] Step 2: Alkali treatment of the carbon-based material, specifically including the steps: adding the carbon-based material to potassium hydroxide solution, sodium hydroxide solution or ammonia solution with a concentration of 1-8 mol / L, soaking at 20-80°C for 4-24 hours; the soaked carbon-based material is washed with deionized water until neutral, and then dried at 60-120° C. for 3-6 hours.
[0018] And / or, carrying out metal and metal oxide loading on the carbon-based material, specifically includes the steps of: adding the carbon-based...
Embodiment 1
[0024] This embodiment provides a method for preparing a modified carbon-based material, comprising the following steps:
[0025] The carbon-containing raw material lignite is mechanically crushed, and then sieved to obtain particles with a particle size of 30-500 μm; the particles are carbonized at a temperature of 600°C for 4 hours, and then physically activated at 700°C for 3 hours to obtain carbon-based materials;
[0026] Add the carbon-based material to 6mol / L potassium hydroxide solution, soak at 45°C for 12 hours; wash the soaked carbon-based material with deionized water until it is neutral, and then place it at 120°C to dry for 4 hours to obtain a modified carbon-based material. Material.
Embodiment 2
[0028] This embodiment provides a method for preparing a modified carbon-based material, comprising the following steps:
[0029]The carbon-containing raw material long-flame coal is mechanically crushed, and then sieved to obtain particles with a particle size of 30-500 μm; the particles are carbonized at a temperature of 600°C for 5 hours, and then physically activated at 750°C for 2 hours to obtain carbon-based materials;
[0030] Put the cooled carbon-based material into an equal volume of water and stir for 1 hour, filter and wash repeatedly three times, and then transfer the filtered solid to a 65°C oven for drying for 4 hours;
[0031] The dried carbon-based material is loaded with metal and metal oxide, which specifically includes the steps of: adding the carbon-based material to an equal volume of copper nitrate solution, and the concentration of the copper nitrate solution is expressed as m (carbon-based material) / m (copper nitrate) =12.3 ratio configuration, after s...
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