Unlock instant, AI-driven research and patent intelligence for your innovation.

A microwave heating hydrazine hydrate reduced carbon airgel and its preparation method

A carbon aerogel, hydrazine hydrate technology, applied in carbon preparation/purification, climate sustainability, sustainable manufacturing/processing, etc. problems such as low preparation efficiency, to achieve the effects of excellent pore structure and electrochemical performance, high specific surface area, and high reduction efficiency

Active Publication Date: 2020-02-18
ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the complex preparation process, low preparation efficiency, and low specific surface area and low specific capacitance of the prepared carbon aerogels, the carbon aerogels prepared at this stage restrict the industrialization and large-scale development of carbon aerogels.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A microwave heating hydrazine hydrate reduced carbon airgel and its preparation method
  • A microwave heating hydrazine hydrate reduced carbon airgel and its preparation method
  • A microwave heating hydrazine hydrate reduced carbon airgel and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) The preparation steps of the carbon airgel blank sample are as follows:

[0043](1) Preparation of organic wet gel: add a certain amount of pyroglucinol and resorcinol, the molar ratio of the two is 1:1, and the ratio of the sum of the amount of the two substances to the amount of formaldehyde is 1: 2 mix, add deionized water and be mixed with the reaction liquid that mass fraction is 35%, add ascorbic acid and sodium carbonate in raw material, the molar ratio of ascorbic acid and added phenol is 1: 5, the molar ratio of sodium carbonate and added phenol is 1:400, mix the reaction solution evenly, seal it, keep it warm at 50°C and fully react for 1 day to obtain a wet gel.

[0044] (2) Solvent replacement: Soak the wet gel prepared in step (1) in an organic solution for solvent replacement, and replace the organic solvent every 24 hours, and replace it 3 times during the period;

[0045] (3) Atmospheric pressure drying: At normal temperature and pressure, after the...

Embodiment 2

[0053] (1) The preparation steps of the carbon airgel blank sample are as follows:

[0054] (1) Preparation of organic wet gel: add a certain amount of pyroglucinol and resorcinol, the molar ratio of the two is 1:3, and the ratio of the sum of the amount of the two substances to the amount of formaldehyde is 1: 2 mix, add deionized water and be mixed with the reaction liquid that mass fraction is 37%, add ascorbic acid and sodium carbonate in raw material, the molar ratio of ascorbic acid and added phenol is 1: 8, the molar ratio of sodium carbonate and added phenol is 1:500, mix the reaction solution evenly, seal it, keep it warm at 50°C for 1 day, and make a wet gel.

[0055] (2) Solvent replacement: Soak the wet gel prepared in step (1) in an organic solution for solvent replacement, and replace the organic solvent every 24 hours, and replace it 3 times during the period;

[0056] (3) Atmospheric pressure drying: At normal temperature and pressure, after the organic solven...

Embodiment 3

[0064] (1) The preparation steps of the carbon airgel blank sample are as follows:

[0065] (1) Preparation of organic wet gel: add a certain amount of pyroglucinol and resorcinol, the molar ratio of the two is 1:5, and the ratio of the sum of the amount of the two substances to the amount of formaldehyde is 1: 2 mix, add deionized water and be mixed with the reaction liquid that mass fraction is 40%, add ascorbic acid and sodium carbonate in raw material, the molar ratio of ascorbic acid and added phenol is 1: 10, the molar ratio of sodium carbonate and added phenol is 1:500, mix the reaction solution evenly, seal it, keep it warm at 50°C and fully react for 1 day to obtain a wet gel.

[0066] (2) Solvent replacement: Soak the wet gel prepared in step (1) in an organic solution for solvent replacement, and replace the organic solvent every 24 hours, and replace it 3 times during the period;

[0067] (3) Atmospheric pressure drying: At normal temperature and pressure, after t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to a carbon aerogel reduced by hydrazine hydrate through microwave heating. The carbon aerogel has the following parameters that the specific surface area is 480 to 803 m<2> / g; the average pore diameter distribution is 5.0 to 10.0 nm; the pore capacity is 0.95 to 1.20 cm<3> / g; the specific capacitance is 88 to 225 F / g. The invention further relates to a preparation method ofthe carbon aerogel. The carbon aerogel has the advantages that after a blank sample of the carbon aerogel is prepared, the hydrazine hydrate is used as a reductant, and the microwave heating is used for efficient reduction to prepare the reduced carbon aerogel; the specific surface area of the reduced carbon aerogel is obviously increased, and the electrochemical property is obviously better thanthe electrochemical property of the blank sample of the unreduced carbon aerogel; by leading the hydrazine hydrate reductant in the preparation process, the carbon aerogel can be reduced at high efficiency, and the nitrogen atoms can be led into the pore structure of the carbon aerogel in the reduction process, so that the electrochemical property is improved; by adopting the microwave heating method, the function of efficient heating is realized, the reduction time is shortened, and the preparation efficiency of the finished product is improved.

Description

technical field [0001] The invention relates to a microwave-heated hydrazine hydrate-reduced carbon airgel and a preparation method thereof. Background technique [0002] As a new type of carbon material, carbon aerogel has the characteristics of low density, high conductivity, continuous pore structure, high specific surface area, etc., and has good application prospects in the fields of new energy, environment and resources. In the field of new energy, it can be used as electrode materials for supercapacitors, cathode materials for lithium-ion batteries, hydrogen storage materials, and key power materials for electric vehicles. In the field of resources and environment, this carbon material can be used as a high-performance adsorption material for seawater desalination, removal of anions and cations, heavy metal ions, radioactive isotopes and some organic wastes in water. This product is a carbon material with great development prospects and wide application. [0003] Th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05
CPCC01B32/05Y02P20/10
Inventor 许跃龙刘振法张利辉任斌
Owner ENERGY RESOURCES INST HEBEI ACADEMY OF SCI