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Preparation method of ultra-light carbon airgel with biomimetic structure

A carbon aerogel, bionic technology, applied in chemical instruments and methods, other chemical processes, physical/chemical process catalysts, etc., can solve the problems of no involvement, secondary pollution, easy release of radioactive elements, etc. Catalytic ability, improve catalytic degradation efficiency, and expand the effect of absorption wavelength range

Active Publication Date: 2022-03-04
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the methods for treating radioactive wastewater produced by nuclear power plants mainly include chemical precipitation, ion exchange, evaporation and concentration, membrane separation, and adsorption. Concentration, commonly used adsorbents include activated carbon, zeolite, montmorillonite, etc. However, the adsorption effect of these adsorbents is unstable, and it is impossible to achieve the adsorption and degradation of organic matter in radioactive wastewater, and to immobilize the formed radioactive adsorbent The curing effect during processing is not good, and radioactive elements are easily released to form secondary pollution
[0004] Carbon aerogel is a new type of lightweight porous material, which is widely used as catalyst carrier, Hydrogen storage materials, adsorption materials, and electrode materials for supercapacitors or lithium-ion batteries, etc., applying carbon aerogels to the adsorption treatment of radioactive wastewater can improve the treatment effect of radioactive wastewater; there is no related use in the prior art Carbon airgel technical solution for radioactive wastewater treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of ultra-light carbon airgel with biomimetic structure, comprising the following steps:

[0029] Step 1. Add konjac glucomannan into the graphene oxide aqueous solution, stir for 15 minutes, then add vacuum packaging bags for vacuum packaging, and control the vacuum degree to 0.1MPa; put the vacuum packaging bags into high static pressure processing equipment, and put the added The pressure chamber is sealed, pressurized and subjected to high static pressure treatment to obtain a konjac glucomannan-graphene oxide mixed solution; the mass percent concentration of the graphene oxide aqueous solution is 3%; the konjac glucomannan and graphene oxide aqueous solution The mass ratio of graphene oxide in the mixture is 1:10; the parameters of high static pressure treatment are: increase the pressure to 700MPa at a rate of 2MPa / s, and hold the pressure for 30min at 55°C; the vacuum packaging bag is nylon- Polyethylene composite bag; the preparation method o...

Embodiment 2

[0034] A preparation method of ultra-light carbon airgel with biomimetic structure, comprising the following steps:

[0035] Step 1. Add konjac glucomannan into the graphene oxide aqueous solution, stir for 10 minutes, then add vacuum packaging bag for vacuum packaging, control the vacuum degree to 0.1MPa; put the vacuum packaging bag into high static pressure processing equipment, put the added The pressure chamber is sealed, pressurized and subjected to high static pressure treatment to obtain a konjac glucomannan-graphene oxide mixed solution; the mass percent concentration of the graphene oxide aqueous solution is 3%; the konjac glucomannan and graphene oxide aqueous solution The mass ratio of graphene oxide in the mixture is 1:10; the parameters of high static pressure treatment are: increase the pressure to 700MPa at a rate of 2MPa / s, and hold the pressure for 30min at 55°C; the vacuum packaging bag is nylon- Polyethylene composite bag; the preparation method of the grap...

Embodiment 3

[0040] A preparation method of ultra-light carbon airgel with biomimetic structure, comprising the following steps:

[0041] Step 1. Add the modified konjac glucomannan into the graphene oxide aqueous solution, stir for 15 minutes, then add the vacuum packaging bag for vacuum packaging, and control the vacuum degree to 0.1MPa; put the vacuum packaging bag into the high static pressure processing equipment, Seal the pressurized cavity, pressurize and perform high static pressure treatment to obtain a modified konjac glucomannan-graphene oxide mixed solution; the mass percentage concentration of the graphene oxide aqueous solution is 3%; the modified konjac glucomannan The mass ratio of sugar to graphene oxide in the graphene oxide aqueous solution is 1:10; the parameters of the high static pressure treatment are: increase the pressure to 700MPa at a rate of 2MPa / s, and hold the pressure at 55°C for 30min; The vacuum packaging bag is a nylon-polyethylene composite bag; the prepa...

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Abstract

The invention discloses a preparation method of ultralight carbon airgel with a bionic structure, comprising: preparing a konjac glucomannan-graphene oxide mixed solution; making konjac glucomannan-graphene oxide mixed solution into konjac glucomannan Glycan-graphene oxide dry body; konjac glucomannan-graphene oxide dry body is treated at high temperature in a nitrogen atmosphere, and cooled to obtain konjac glucomannan-graphene carbon airgel; konjac glucomannan-graphene carbon airgel is obtained; konjac glucomannan-graphene Graphene carbon airgel is added to titanium sulfate aqueous solution, stirred and transferred to a polytetrafluoroethylene stainless steel reactor, hydrothermal reaction, natural cooling to obtain a hydrothermal product, and the obtained hydrothermal product is cleaned and vacuum-dried to obtain titanium dioxide Loaded biomimetic structure ultralight carbon aerogel. The prepared biomimetic structure ultralight carbon airgel has dual functions of adsorption and catalysis, and the synergistic effect of adsorption and catalytic degradation in the radioactive wastewater system will be much stronger than the effect of the two independent applications.

Description

technical field [0001] The invention belongs to the field of airgel preparation, and in particular relates to a method for preparing an ultralight carbon airgel with a bionic structure. Background technique [0002] A large amount of radioactive wastewater is produced in the production process of the nuclear industry. Due to its strong radioactivity, long half-life, and high biological and chemical toxicity, radioactive wastewater poses a great long-term hazard to humans and the environment. Therefore, the treatment of radioactive wastewater has always been an important part of the development of the modern nuclear industry important and essential link. [0003] At present, the methods for treating radioactive wastewater produced by nuclear power plants mainly include chemical precipitation, ion exchange, evaporation and concentration, membrane separation, and adsorption. Concentration, commonly used adsorbents include activated carbon, zeolite, montmorillonite, etc. Howeve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J21/18B01J35/10G21F9/06G21F9/12
CPCB01J20/20B01J20/06B01J20/28047B01J21/18B01J35/004B01J35/10G21F9/12G21F9/06
Inventor 竹文坤何嵘段涛杨帆陈涛王茜姜磊刘波王蓉
Owner SOUTHWEAT UNIV OF SCI & TECH
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