Multi-heteroatom codoped hollow porous carbon material, preparation method and application thereof

A porous carbon material and co-doping technology, which is applied in the preparation of nitrogen, carbon preparation/purification, separation methods, etc., can solve the problems of carbon materials without three-element doping, and achieve high surface utilization and good wetting The effect of wetness and developed voids

Active Publication Date: 2018-08-10
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the capacitive desalination electrode materials are mainly nitrogen-doped, and a small amount of nitrogen-phosphorus co-doped carbon materials, and there are almost no reports on three-element doped carbon materials.

Method used

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  • Multi-heteroatom codoped hollow porous carbon material, preparation method and application thereof
  • Multi-heteroatom codoped hollow porous carbon material, preparation method and application thereof
  • Multi-heteroatom codoped hollow porous carbon material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Dissolve zinc nitrate hexahydrate and 2-methylimidazole with a molar ratio of 1:7 in 100 ml of methanol solution, and mechanically stir for 24 h at a stirring speed of 310 rpm / min to complete the reaction, then centrifuge and wash with methanol solution for 2~ 3 times, dry to get metal organic framework ZIF-8;

[0031] The obtained metal-organic framework ZIF-8 was prepared as a methanol solution with a mass concentration of 0.8wt% ZIF-8, and hexachlorocyclotriphosphazene, 4,4'-sulfonyldiphenol and ZIF-8 were prepared at a molar ratio of 1:3:1. Ratio, at a stirring speed of 310 rpm / min, the methanol solution of hexachlorocyclotriphosphazene and 4,4'-sulfonyldiphenol was added dropwise to the methanol solution of ZIF-8 at a speed of 60mL / min, Add 1 mL of triethylamine dropwise, continue vigorous mechanical stirring for 18 h, centrifuge, wash with methanol 2 to 3 times, dry at 80°C, place in a tube furnace, and control the heating rate under the protection of nitrogen at ...

Embodiment 2

[0034] Dissolve zinc nitrate hexahydrate and 2-methylimidazole with a molar ratio of 1:75 in 200ml of methanol solution, and mechanically stir for 24 hours at a stirring speed of 330rpm / min to complete the reaction, then centrifuge and wash with methanol solution for 2~3 times, drying to obtain the metal-organic framework ZIF-8;

[0035] The obtained metal-organic framework ZIF-8 was prepared into a methanol solution with a mass concentration of 0.9 wt% ZIF-8, and hexachlorocyclotriphosphazene, 4,4'-sulfonyldiphenol and ZIF-8 were prepared at a molar ratio of 1:3:2 Ratio, at a stirring speed of 330 rpm / min, add the methanol solution of hexachlorocyclotriphosphazene and 4,4'-sulfonyldiphenol dropwise to the methanol solution of ZIF-8 at a speed of 60mL / min, Add 1 mL of triethylamine dropwise, continue vigorous mechanical stirring for 18 h, centrifuge, wash with methanol 2 to 3 times, dry at 80°C, place in a tube furnace, and control the heating rate under the protection of nitr...

Embodiment 3

[0038] Dissolve zinc nitrate hexahydrate and 2-methylimidazole with a molar ratio of 1:8 in 160ml of methanol solution, and mechanically stir for 24 hours at a stirring speed of 320rpm / min to complete the reaction, then centrifuge and wash with methanol solution for 2~3 times, drying to obtain the metal-organic framework ZIF-8;

[0039] The obtained metal-organic framework ZIF-8 was prepared as a methanol solution with a mass concentration of 0.86wt% ZIF-8, and hexachlorocyclotriphosphazene, 4,4'-sulfonyldiphenol and ZIF-8 were prepared at a molar ratio of 1:4:3 Ratio, at a stirring speed of 320 rpm / min, the methanol solution of hexachlorocyclotriphosphazene and 4,4'-sulfonyldiphenol was added dropwise to the methanol solution of ZIF-8 at a speed of 60mL / min, Add 1 mL of triethylamine dropwise, continue vigorous mechanical stirring for 18 h, centrifuge, wash with methanol 2 to 3 times, dry at 80°C, place in a tube furnace, and control the heating rate under the protection of n...

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Abstract

The invention relates to a multi-heteroatom codoped hollow porous carbon material, a preparation method and application thereof. The method includes: firstly taking a metal-organic framework as the structure template and nitrogen source, then adding two reactants containing nitrogen, phosphorus and sulfur heteroatoms for in situ polymerization reaction on the surface of the metal-organic frameworkcompound, and doping nitrogen, phosphorus and sulfur heteroatoms at the same time to obtain a compound with similar geometric profile to a pure metal-organic framework compound crystal, and conducting high-temperature calcination and hydrochloric acid aqueous solution reaction to remove metal oxide, thus obtaining the multi-heteroatom codoped hollow porous carbon material; and mixing the composite material, acetylene black and a polytetrafluoroethylene emulsion evenly, then coating graphite paper with the mixture, and performing drying to obtain a capacitance desalination electrode. The method provided by the invention has the characteristics of simple operation and easily controllable conditions, and the obtained electrode has high specific surface area, good electrical conductivity andwettability, and has potential application prospects in capacitance desalination aspect.

Description

technical field [0001] The invention relates to a hollow porous carbon material co-doped with various heteroatoms, its preparation method and its application. Background technique [0002] The shortage of fresh water resources is one of the biggest resource crises facing the world in this century. Seawater and brackish water desalination technology, as an important way to effectively solve this crisis, has attracted widespread attention from the society. The existing desalination methods mainly include distillation and membrane methods. The distillation method has high operating temperature, high energy consumption, serious scale hazards and serious corrosion; the membrane method has strict requirements on membrane performance, high membrane damage rate and high cost. In addition, these desalination methods all have the disadvantage of high energy consumption. Even the reverse osmosis membrane method with the lowest energy consumption consumes about ten times the theoretica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B21/02H01G9/042H01G11/34C02F1/469C02F103/08
CPCH01G9/042H01G11/34C01B21/02C01B32/05C02F1/46109C02F1/4691C02F2103/08C02F2001/46138Y02E60/13
Inventor 张登松方建慧施利毅张静颜婷婷
Owner SHANGHAI UNIV
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