Preparation method of biomass source N/P co-doped carbon aerogel/cross-linked chitosan composite membrane electrode

A technology of cross-linked chitosan and carbon airgel, which is applied in separation methods, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of relying on the fine structure and size of templates, difficulty in mass production, and high production costs. Achieve the effect of reducing production cost, increasing adsorption capacity and improving effect

Active Publication Date: 2020-11-03
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon aerogels are prepared using chemicals such as polyols and acids as raw materials, but the production cost is high; carbon aerogels can also be prepared by the template-oriented method, but the process is complicated and depends on the fine structure and size of the template, making it difficult to mass produce

Method used

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  • Preparation method of biomass source N/P co-doped carbon aerogel/cross-linked chitosan composite membrane electrode

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Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 (by chitosan and N, P co-doped carbon airgel mass ratio is 1:0.1 implementation)

[0030] The preparation method of biomass source N, P co-doped carbon airgel / cross-linked chitosan composite membrane electrode, the specific steps are as follows:

[0031] (1) Preparation of biomass-sourced N and P co-doped carbon aerogels

[0032] The discarded biomass (grapefruit peel, bagasse) is removed from the outer skin, cut into a suitable size and washed, and then the 30g biomass is fully absorbed, then mixed with 80ml deionized water, 3g aminomethylphosphonic acid (N, P co-doping sources) were added to the hydrothermal kettle together, and the hydrothermal reaction was carried out at 250°C for 16 hours to obtain pre-carbonized N and P co-doped carbon hydrogels, and then the pre-carbonized N and P co-doped The carbon hydrogel is soaked in a mixture of water and ethanol for several days to remove soluble impurities in the pre-carbonized N, P co-doped carbon hydrogel;

...

Embodiment 2

[0037] Example 2 (by chitosan and N, P co-doped carbon airgel mass ratio is 1:0.2 implementation)

[0038] The preparation method of biomass source N, P co-doped carbon airgel / cross-linked chitosan composite membrane electrode, the specific steps are as follows:

[0039] (1) Preparation of biomass-sourced N and P co-doped carbon aerogels

[0040] The discarded biomass (grapefruit peel, bagasse) is removed from the outer skin, cut into a suitable size and washed, and then the 30g biomass is fully absorbed, then mixed with 80ml deionized water, 3g aminomethylphosphonic acid (N, P co-doping sources) were added to the hydrothermal kettle together, and the hydrothermal reaction was carried out at 250°C for 16 hours to obtain pre-carbonized N and P co-doped carbon hydrogels, and then the pre-carbonized N and P co-doped The carbon hydrogel is soaked in a mixture of water and ethanol for several days to remove soluble impurities in the pre-carbonized N, P co-doped carbon hydrogel;

...

Embodiment 3

[0045] Example 3 (by chitosan and N, P co-doped carbon airgel mass ratio is 1:0.3 implementation)

[0046] The preparation method of biomass source N, P co-doped carbon airgel / cross-linked chitosan composite membrane electrode, the specific steps are as follows:

[0047] (1) Preparation of biomass-sourced N and P co-doped carbon aerogels

[0048] The discarded biomass (grapefruit peel, bagasse) is removed from the outer skin, cut into a suitable size and washed, and then the 30g biomass is fully absorbed, then mixed with 80ml deionized water, 3g aminomethylphosphonic acid (N, P co-doping sources) were added to the hydrothermal kettle together, and the hydrothermal reaction was carried out at 250°C for 16 hours to obtain pre-carbonized N and P co-doped carbon hydrogels, and then the pre-carbonized N and P co-doped The carbon hydrogel is soaked in a mixture of water and ethanol for several days to remove soluble impurities in the pre-carbonized N, P co-doped carbon hydrogel;

...

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Abstract

According to the preparation method of the biomass source N / P co-doped carbon aerogel / crosslinked chitosan composite membrane electrode, cheap natural biomass with a natural plant fiber sponge structure, such as shaddock peel and bagasse, which are agricultural processing wastes, is used as a raw material, and the N / P co-doped carbon aerogel with a developed mesoporous structure is prepared through the processes of pre-carbonization, high-temperature carbonization and the like; furthermore, the N / P co-doped carbon aerogel and chitosan are compounded to prepare an electro-adsorption membrane electrode for electro-adsorption separation of uranium in uranium-containing wastewater, so that the production cost is reduced and the material performance is improved. The biomass source N / P co-dopedcarbon aerogel / chitosan composite membrane electrode has a high specific surface area, good conductivity and chemical stability and is suitable for industrial production. When used for electro-adsorption separation of uranium in uranium-containing wastewater, the composite membrane electrode has high uranium recovery rate and adsorption capacity, and can meet industrial production requirements.

Description

technical field [0001] The invention relates to the technical field of preparation of functional materials, in particular to a method for preparing a biomass source N and P co-doped carbon airgel / cross-linked chitosan composite membrane electrode. Background technique [0002] my country's uranium resources are scarce, and the grade of terrestrial uranium ore is low, mostly depleted uranium ore, so it is difficult to meet my country's future nuclear fuel supply demand. Efficient separation of uranium from uranium-containing waste liquid can not only effectively recover uranium resources, but also help reduce environmental pollution. Using traditional separation methods such as solvent extraction, membrane separation, etc. to separate and enrich low-concentration uranium has poor technical and economic feasibility; while electro-adsorption is an effective method for separating uranium from uranium-containing wastewater, which has low energy consumption and low pollution , Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469C02F1/461G21F9/12
CPCC02F1/469C02F1/46109G21F9/12C02F2001/46138
Inventor 周利民欧阳金波刘峙嵘
Owner EAST CHINA UNIV OF TECH
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