Method for preparing graded porous carbon material capacitance type desalination electrode material

A technology of graded porous and electrode materials, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc.

Active Publication Date: 2017-12-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there are few reports on ordered mesoporous MOFs and their carbon materials as capacitive desalination electrodes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve 2-methylimidazole in deionized aqueous solution to prepare a solution with a concentration of 2 wt%, and adjust the pH value of the solution to 9, and mix well to obtain solution A; zinc nitrate hexahydrate and surfactant by mass Dissolve in deionized water at a ratio of 1:1 to prepare a solution with a zinc nitrate concentration of 1 wt%, mix well to obtain solution B; at a stirring rate of 350rpm / min, add solution B dropwise to solution A After stirring for 12 h, the porous metal-organic framework ZIF-8 was obtained by centrifugation, washing with deionized water for 2–3 times, and drying at 80 °C.

[0020] The obtained porous metal-organic framework ZIF-8 was placed in a tube furnace, under the protection of nitrogen gas with a gas flow rate of 90 mL / min, the heating rate was controlled at 2 °C / min, the temperature was raised to 900 °C, and the temperature was kept at 900 °C for 3 h. After cooling to room temperature, add 2M hydrochloric acid solution and st...

Embodiment 2

[0023] Dissolve 2-methylimidazole in deionized aqueous solution to prepare a solution with a concentration of 3 wt%, and adjust the pH value of the solution to 10, and mix well to obtain solution A; zinc nitrate hexahydrate and surfactant by mass Dissolve in deionized water at a ratio of 1:2 to prepare a solution with a zinc nitrate concentration of 1.5 wt%, mix well to obtain solution B; at a stirring rate of 400rpm / min, add solution B dropwise to solution A , after stirring for 16 h, the porous metal-organic framework ZIF-8 was obtained by centrifugation, washing with deionized water for 2–3 times, and then drying at 80 °C.

[0024] The obtained porous metal organic framework ZIF-8 was placed in a tube furnace, under the protection of nitrogen gas with a gas flow rate of 100 mL / min, the heating rate was controlled at 3 °C / min, the temperature was raised to 800 °C, and the temperature was kept at 800 °C for 4 h. After cooling to room temperature, add 2M hydrochloric acid solu...

Embodiment 3

[0027] Dissolve 2-methylimidazole in deionized aqueous solution to prepare a solution with a concentration of 3 wt%, and adjust the pH value of the solution to 11, and mix well to obtain solution A; zinc nitrate hexahydrate and surfactant by mass Dissolve in deionized water at a ratio of 1:3 to prepare a solution with a zinc nitrate concentration of 2 wt%, mix well to obtain solution B; at a stirring rate of 450rpm / min, add solution B dropwise to solution A , after stirring and reacting for 20 h, the porous metal-organic framework ZIF-8 was obtained by centrifugation, washing with deionized water for 2–3 times, and then drying at 80 °C.

[0028] The obtained porous metal organic framework ZIF-8 was placed in a tube furnace, under the protection of nitrogen gas with a gas flow rate of 130 mL / min, the heating rate was controlled at 4 °C / min, the temperature was raised to 700 °C, and the temperature was kept at 700 °C for 5 h. After cooling to room temperature, add 2M hydrochlori...

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Abstract

The invention relates to a method for preparing a graded porous carbon material capacitance type desalination electrode material. According to the method, a metal organic frame is synthesized by selecting water as a solvent, and a surfactant serving as a template is introduced in the synthesizing process to change the unique microporous structure of the metal organic frame to obtain a uniform mixed solution; and residual active components are washed at a certain temperature to obtain the graded porous structure metal organic frame compound. The compound has a geometrical appearance similar to a pure metal organic frame compound crystal, and metal inside the compound can be removed through high-temperature calcining and hydrochloric acid solution reactions, so that the graded porous carbon material with high nitrogen content can be obtained; the compound material, acetylene black and polytetrafluoroethylene emulsion are uniformly mixed and coated to graphite paper, and drying is carried out to obtain the capacitance type desalination electrode. The method is simple in operation and easily controlled in condition, mass synthesis can be achieved, and the electrode has high nitrogen content, high specific surface and excellent conductivity and wettability, and has a potential application prospect in the aspect of capacitance type desalination.

Description

technical field [0001] The invention relates to a preparation method of a hierarchical porous carbon material capacitive desalination electrode material. Background technique [0002] With the development of human society, energy shortage and environmental pollution have seriously affected the survival and development of human beings, especially the crisis of water resources. Seawater and brackish water desalination technology, as an important way to effectively solve the crisis, has attracted widespread attention from the society. At present, the existing desalination technology methods mainly include distillation method and membrane method. However, these traditional desalination technologies have some unavoidable problems. The selective semi-permeable membrane used in the membrane method has high cost, large equipment investment, easy clogging of membrane components and secondary pollution; The temperature is high, the energy consumption is large, and the scale damage a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
CPCC02F1/46109C02F1/46114C02F2001/46133C02F2001/46161
Inventor 张登松施利毅颜婷婷
Owner SHANGHAI UNIV
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