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Nitrogen-phosphorus co-doped porous carbon material and preparation and application methods thereof

A porous carbon material and co-doping technology, applied in the field of water treatment, can solve the problem of low chloride ion electro-adsorption performance, and achieve the effects of controllable preparation method, improved removal efficiency, and improved electro-adsorption performance.

Active Publication Date: 2021-09-24
CENT SOUTH UNIV
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  • Description
  • Claims
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a preparation method of nitrogen-phosphorus co-doped porous carbon material for electro-adsorption of chloride ions, aiming to solve the technical problem of low electro-adsorption performance of chloride ions in the prior art

Method used

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  • Nitrogen-phosphorus co-doped porous carbon material and preparation and application methods thereof
  • Nitrogen-phosphorus co-doped porous carbon material and preparation and application methods thereof

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preparation example Construction

[0039]In order to obtain a nitrogen-phosphorus co-doped porous carbon material with high adsorption efficiency for chloride ions, the invention provides a method for preparing a nitrogen-phosphorus co-doped porous carbon material for electroadsorption of chloride ions, comprising steps:

[0040] S1, add the aqueous solution of persulfate and phytic acid solution to the aqueous solution of m-phenylenediamine to carry out polymerization reaction, and then sequentially separate, wash and dry the products obtained in the polymerization reaction to obtain poly-m-phenylenediamine@phytic acid particles.

[0041] Wherein, the step of adding the aqueous solution of persulfate and the phytic acid solution into the aqueous solution of m-phenylenediamine to carry out the polymerization reaction may include: adding the aqueous solution of persulfate and the phytic acid solution into the m-phenylenediamine Aqueous solution of amine, and carry out standing reaction at a temperature of 0-40°C...

Embodiment 1

[0106] A kind of material and preparation method thereof for electroadsorbing chloride ions

[0107] 1. Weigh 1g of m-phenylenediamine monomer and place it in a petri dish, add 10mL of deionized water, and magnetically stir to completely dissolve m-phenylenediamine to obtain an aqueous solution of m-phenylenediamine; weigh 2.6191g of sodium persulfate and set In a beaker, add 10mL of deionized water to dissolve it to obtain an aqueous solution of sodium persulfate.

[0108] 2. Add the aqueous solution of sodium persulfate dropwise into the petri dish containing the aqueous solution of m-phenylenediamine, then add 1.68mL 50% phytic acid solution, and let it stand for 24 hours to make the polymerization reaction complete; after the polymerization reaction ends, The product obtained by the polymerization reaction is separated by suction filtration, and then washed with 25-28% ammonia water and deionized water to remove impurities, and dried after washing, and the obtained black p...

Embodiment 2

[0113] A kind of material and preparation method thereof for electroadsorbing chloride ions

[0114] 1. Weigh 1g of m-phenylenediamine monomer and place it in a petri dish, add 10mL of deionized water, and magnetically stir to completely dissolve m-phenylenediamine to obtain an aqueous solution of m-phenylenediamine; weigh 2.6191g of sodium persulfate and set In a beaker, add 10mL of deionized water to dissolve it to obtain an aqueous solution of sodium persulfate.

[0115] 2. Add the aqueous solution of sodium persulfate dropwise into the petri dish containing the aqueous solution of m-phenylenediamine, then add 1.68mL 50% phytic acid solution, and let it stand for 24 hours to make the polymerization reaction complete; after the polymerization reaction ends, The product obtained by the polymerization reaction is separated by suction filtration, and then washed with 25-28% ammonia water and deionized water to remove impurities, and dried after washing, and the obtained black p...

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Abstract

The invention provides a preparation method of a nitrogen-phosphorus co-doped porous carbon material for electrically adsorbing chloride ions, which comprises the following steps: S1, adding an aqueous solution of persulfate and a phytic acid solution into an aqueous solution of m-phenylenediamine to carry out polymerization reaction, and then sequentially separating, cleaning and drying a product obtained by the polymerization reaction to obtain a nitrogen-phosphorus co-doped porous carbon material, thus preparing the poly(m-phenylenediamine)@phytic acid particles; s2, carrying out activation treatment on the poly(m-phenylenediamine)@phytic acid particles twice at the temperature of 600-1000 DEG C in an N2 atmosphere in a manner of after the first activation treatment, cleaning and drying the product of the first activation treatment, performing second activation treatment on the dried substance, and then cleaning and drying the product of the second activation treatment to obtain the nitrogen and phosphorus co-doped porous carbon material, wherein in the first activation treatment and the second activation treatment, the material is activated by adopting potassium bicarbonate and ammonium dihydrogen phosphate respectively. The nitrogen and phosphorus co-doped porous carbon material prepared by the preparation method disclosed by the invention can be used for improving the electric adsorption performance on chloride ions.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a porous carbon material co-doped with nitrogen and phosphorus, and a preparation and application method thereof. Background technique [0002] Chlorine-containing wastewater is an important source of pollution in metallurgical and other industrial processes, which seriously threatens production safety, human health and the ecological environment. Traditional chlorine removal methods mainly include distillation, reverse osmosis, electrodialysis and ion exchange. However, the disadvantages of high energy consumption and difficult regeneration greatly limit its large-scale industrial application. In recent years, due to its advantages of low energy consumption, no secondary pollution in the regeneration process, and easy operation, the electrosorption technology has attracted extensive attention from researchers. [0003] The key to improving the performance of electrosor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/342C01B32/318C02F1/469C02F101/12
CPCC01B32/348C01B32/342C01B32/318C02F1/4691C02F2101/12
Inventor 王海鹰贺颖捷陈鹏柴立元刘恢李青竹杨卫青廖骐
Owner CENT SOUTH UNIV
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