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Nitrogen-and-phosphorus-atom co-doped CDI active material and preparation and application thereof

An active material and co-doping technology, applied in the field of environmental engineering, can solve the problems of poor material stability, low heteroatom doping efficiency, uneven distribution of heteroatoms, etc., to improve the doping amount, maintain the material structure, improve the electrical The effect of adsorption performance

Active Publication Date: 2020-03-31
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the post-processing method may lead to problems such as low heteroatom doping efficiency, uneven distribution of heteroatoms, and poor stability of the material.
Therefore, how to realize the controllable synthesis of heteroatom-doped carbon materials in a simple and environmentally friendly manner remains a challenge.

Method used

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  • Nitrogen-and-phosphorus-atom co-doped CDI active material and preparation and application thereof
  • Nitrogen-and-phosphorus-atom co-doped CDI active material and preparation and application thereof
  • Nitrogen-and-phosphorus-atom co-doped CDI active material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Weigh 2g of formula 1-A monomer and dissolve it in 10mL of deionized water, then add 1.68mL of 50% formula 2 solution (mass ratio of formula 1-A: formula 2 is 10:1), stir and mix well to obtain a solution 1. Then weigh 2.202 g of sodium persulfate (the molar ratio of the monomer of formula 1-A to sodium persulfate is 0.5) and dissolve it in 5 mL of deionized water, stir and dissolve to obtain solution 2. Put the two solutions into the refrigerator at the same time for 20 minutes to cool down to below 10°C, then pour them into the petri dish at the same time and shake them quickly to make them fully contact with the reaction, and then let them stand at room temperature for 24 hours. After the reaction was completed, the sample was suction-filtered with deionized water until the filtrate was colorless, and the washed sample was dried at 60°C and collected. The collected material is then placed in a tube furnace, where the N 2 Carbonization at 800 °C for 2 h in the atmos...

Embodiment 2～4

[0093] Adjust the volume of the added solution of Formula 2 to 0mL, 1.12mL and 3.36mL respectively, and the other conditions are the same as in Example 1. The prepared materials are respectively denoted as C-PmPD, C-PmPD@PA-15:1 and C-PmPD@PA-15:1 and C- PmPD@PA-5:1.

Embodiment 5

[0108] Preparation of electrode materials for capacitive desalination

[0109] The polym-phenylenediamine derived nitrogen and phosphorus co-doped carbon material (CDI electrode active material) prepared in embodiment 1-4 and conductive carbon black and binding agent (polyvinylidene fluoride PVDF) according to 8:1:1 The ratio was dissolved in 1 ml of N-methylpyrrolidone solution, then the mixed material was milled for 20 minutes to form a viscous slurry which was coated on a titanium electrode plate. The electrode plate was dried under natural ventilation at room temperature for 12 hours, and then dried in an oven at 120°C for 12 hours to remove all solvents and form a carbon film, and then the CDI electrode material was prepared. The quality of the active material used for electrosorption can be obtained by weighing the mass of the titanium electrode plate before and after coating and calculating the difference, which is controlled at 40±5mg. The area coated with the active m...

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Abstract

The invention belongs to the field of electro-adsorption materials and specifically discloses a preparation method of a nitrogen-and-phosphorus-atom co-doped CDI active material. The preparation method comprises the following steps: mixing an aromatic diamine monomer represented by a structural formula 1, a monomer represented by a structural formula 2 and an oxidant, carrying out standing, and then carrying out a static cross-linking copolymerization reaction to obtain a cross-linked copolymer; and carrying out carbonization treatment to obtain the nitrogen-and-phosphorus-atom co-doped CDI active material. The invention also discloses the material prepared by using the preparation method and application of the material in electro-adsorption desalination. The material prepared by the method is used as a capacitance desalination electrode material to desalinate seawater and treat salt-containing wastewater; and the method has the characteristics of simple process flow, convenience in operation, no secondary pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to an electro-adsorption material for saline solution and a preparation method thereof. Background technique [0002] With the increase of population, industrial development and climate change, it is expected that the global water resource shortage will become more and more serious in the next few decades. We urgently need to find an effective way to solve the water resource crisis, so seawater desalination has received widespread attention. In addition, the wastewater produced in the metallurgical process also contains a relatively high concentration of chloride ions (500-1000mg / L). The continuous circulation and accumulation of chloride ions in the reaction process will produce a large amount of high-chlorine wastewater, which will not only corrode pipes, furnace linings, and anodes production equipment such as plates, and will seriously affect the sa...

Claims

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Application Information

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IPC IPC(8): C02F1/469C02F101/12
CPCC02F1/4691C02F2101/12
Inventor 王海鹰袁韬柴立元贺颖捷杨志辉石岩杨卫春廖骐刘恢
Owner CENT SOUTH UNIV
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