Preparation method of non-metal catalyst for efficiently degrading phenol, and catalyst
A non-metallic catalyst and catalyst technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high treatment costs, secondary pollution, infiltration, etc., and achieve low cost and saving Low energy consumption and low cost
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[0026] A kind of preparation method of the non-metallic catalyst of efficient degradation phenol of the present invention, comprises the steps:
[0027] 1) Add 10-40wt.% nitrogen precursor, 10-40wt.% silicon dioxide and 40-60wt.% zinc chloride to 100-500mml aqueous solution according to mass percentage, stir and mix evenly to obtain a suspension solution ;in,
[0028] The nitrogen precursor is more than one of polyaniline, polyacrylonitrile, urea and melamine. The mass ratio of the silicon dioxide to the nitrogen-containing precursor is 0.25˜4:1.
[0029] 2) heating and stirring the obtained suspension at a set temperature and a set time to obtain a nitrogen precursor, silicon dioxide and zinc chloride solid composite; wherein, the set temperature is 50-90°C, The setting time is 5~10h.
[0030] 3) Perform a pyrolysis reaction on the obtained solid compound at a set temperature and a set time to obtain a carbonized compound; wherein, the pyrolysis reaction time is 0.5-4 hour...
Embodiment 1
[0036] (1) Add 0.2g of silicon dioxide, 0.4g of polyacrylonitrile and 0.4g of zinc chloride into 100ml of distilled water at a mass ratio of 0.5:1 to the nitrogen-containing precursor, stir and mix evenly to obtain suspension solution;
[0037] (2) heating and stirring the suspension solution at 50° C. for 5 hours to obtain a solid composite of polyacrylonitrile, silicon dioxide and zinc chloride;
[0038] (3) performing a pyrolysis reaction on the solid composite at 600° C. for 2 hours to obtain a carbonized composite;
[0039] (4) washing the carbonized complex with sodium hydroxide with a concentration of 1M for 4 hours;
[0040] (5) The solution obtained after alkali washing was centrifuged at 10,000 rpm for 10 min, and vacuum-dried at 75° C. to obtain a nitrogen-doped hierarchically porous carbon material, which was the catalyst.
[0041] The SEM image of the prepared metal-free catalyst is shown in figure 1 Shown; The prepared non-metallic catalyst N 2 Adsorption-des...
Embodiment 2
[0043] (1) Add 0.1g of silicon dioxide, 0.4g of polyacrylonitrile and 0.5g of zinc chloride into 100ml of distilled water at a mass ratio of 0.25:1 of silicon dioxide and nitrogen-containing precursor, stir and mix evenly to obtain a suspension solution;
[0044] (2) heating and stirring the suspension solution at 90° C. for 5 hours to obtain a solid composite of polyacrylonitrile, silicon dioxide and zinc chloride;
[0045] (3) performing a pyrolysis reaction on the solid composite at 600° C. for 2 hours to obtain a carbonized composite;
[0046] (4) washing the carbonized complex with sodium hydroxide with a concentration of 1M for 6 hours;
[0047] (5) The solution obtained after alkali washing was centrifuged at 8000 rpm for 10 min, and vacuum-dried at 75° C. to obtain a nitrogen-doped hierarchically porous carbon material, which was the catalyst.
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