Preparation method of metal-organic framework carbon nanotube hybrid desalination electrode

A technology of carbon nanotubes and organic frameworks, which is applied in the field of preparation of metal-organic framework carbon nanotube hybrid desalination electrodes, can solve the problems of polypyrrole nanotube preparation process complexity, low pore utilization rate, and low conductivity, and achieve The specific surface area and conductivity are controllable, easy to obtain, and the effect of improving conductivity

Active Publication Date: 2019-11-15
HOHAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the defects of the prior art, the object of the present invention is to provide a method for preparing a metal-organic framework carbon nanotube hybrid desalination electrode, so as to solve the problem of low pore utilization when the carbon material existing in the prior art is used as a desalination electrode; and Although metal-organic framework materials have high porosity, their electrical conductivity is low, and the preparation process of polypyrrole nanotubes as a conductive linker is complicated and the yield is low

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  • Preparation method of metal-organic framework carbon nanotube hybrid desalination electrode

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Embodiment 1

[0034]50 mg of carbon nanotubes were stirred in an ice bath at 200 rpm and added with concentrated nitric acid, left standing for 20 hours, centrifuged, and washed several times with distilled water to obtain carboxylated carbon nanotubes. Under ultrasonication, 50 mg of carboxylated carbon nanotubes were dispersed in 15 g of methanol solvent for 2 hours to obtain a carboxylated carbon nanotube solution; then 505 mg of cobalt nitrate was dispersed into the obtained carboxylated carbon nanotube solution under stirring for 1 hour to obtain A 20 mL carbon nanotube cobalt metal salt solution was formed. 350 mg of 2-methylimidazole was dissolved in 14 mL of methanol to form 15 mL of organic ligand solution; then the organic ligand solution was added dropwise to the carbon nanotube cobalt metal salt mixed solution for 1 hour under continuous stirring; left to stand for 24 hours After that, the precipitate was collected by centrifugation, washed thoroughly with methanol for several t...

Embodiment 2

[0040] 50 mg of carbon nanotubes were stirred in an ice bath at 300 rpm and added with concentrated nitric acid, left standing for 20 hours, and washed with distilled water for several times after centrifugation to obtain carboxylated carbon nanotubes. 50 mg of carboxylated carbon nanotubes were dispersed in 20 g of methanol solvent under sonication for 1 hour; then 750 mg of cobalt oxalate was dispersed into the resulting carboxylated carbon nanotube solution by sonication for 1 hour to form 21 ml of carbon nanotube cobalt metal salt solution. 800 mg of hexahydroxytriphenyl was dissolved in 20 mL of dimethylformamide to form 21 mL of the organic ligand solution; then the organic ligand solution was added dropwise to the carbon nanotube cobalt metal salt mixed solution for 1.5 hours with constant stirring; let stand After 24 h, the precipitate was collected by centrifugation, washed thoroughly with distilled water several times, and finally dried at 70 °C for 24 h to obtain th...

Embodiment 3

[0044] Add concentrated nitric acid to 50 mg of carbon nanotubes with stirring in an ice bath at 250 rpm, let stand for 20 hours, centrifuge, and wash with distilled water for several times to obtain carboxylated carbon nanotubes. 50 mg of carboxylated carbon nanotubes were dispersed in 25 g of methanol solvent under sonication for 1 hour; then 750 mg of cobalt sulfate was dispersed into the resulting carboxylated carbon nanotube solution by sonication for 0.5 h to form 25 mL of carbon nanotube cobalt metal salt solution. Dissolve 1.25 g of terephthalic acid in 25 mL of methanol to form 26 mL of an organic ligand solution; then add the prepared organic ligand solution dropwise to the carbon nanotube cobalt metal salt mixed solution prepared above under continuous stirring 1 hour; after standing for 24 hours, the precipitate was collected by centrifugation, washed thoroughly with ethanol for several times, and finally dried at 80 °C for 24 hours to obtain the MOF / CNT hybrid mat...

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Abstract

The invention discloses a preparation method of a metal-organic framework carbon nanotube hybrid desalination electrode. The preparation method comprises following steps: mixing different cobalt salts, carboxylated carbon nanotubes, and an organic ligand solution; carrying out centrifugation, washing and drying to obtain a hybrid electrode material; evenly mixing the material with acetylene blackand a polyvinyl alcohol solution, painting the mixed solution on graphite paper, and drying the graphite paper to obtain the hybrid desalination electrode. The preparation method has following advantages: (1) the provided preparation method is simple and is easy to operate, the reaction process is easy to control, the conductive agent namely carbon nanotubes is easy to obtain, and the preparationmethod is suitable for large scale production; (2) the conductive performance of obtained hybrid material is improved, and thus the desalination performance of the hybrid material is enhanced; and (3)the ratio of the metal-organic framework to the carbon nanotubes can be adjusted so as to control the specific surface area and conductivity of the hybrid material.

Description

technical field [0001] The invention relates to the technical field of capacitor desalination electrode manufacture, in particular to a preparation method of a metal-organic frame carbon nanotube hybrid desalination electrode. Background technique [0002] Capacitive desalination technology, namely capacitive deionization technology, also known as electroadsorption, is a new desalination technology based on the principle of electric double layer. It has the advantages of high desalination efficiency, low energy consumption, and environmental friendliness. The development of material technology and the new type of saltwater desalination technology that has been paid more and more attention. [0003] At present, about one tenth of the world's population has no access to clean drinking water, and since the beginning of the new century, the problem of water shortages has intensified. It is urgent to comprehensively change the way of water resources utilization and actively deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469C02F103/08
CPCC02F1/4691C02F2103/08
Inventor 李承龙徐兴涛杨涛
Owner HOHAI UNIV
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