A kind of halloysite clay doped graphene airgel and preparation method thereof
A graphene aerogel, graphene hydrogel technology, applied in aerogel preparation, chemical instruments and methods, colloidal chemistry and other directions, can solve the problems of few active groups on the surface of the tube wall, difficult to porous materials, etc., Achieve the effect of good adsorption, lower production cost and lower dosage
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0025] Step 1: Suspend 10ml of graphene oxide, add 1g of modified halloysite nanopowder to the graphene oxide suspension, and stir fully to obtain a uniform mixed solution;
[0026] Step 2, ultrasonically disperse the mixed solution prepared in step 1, and ultrasonically disperse it at 50% power for 30 minutes; then import it into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 180 degrees Celsius for 180 minutes to obtain a black block clay graphene hydrogel .
[0027] In step 3, the hydrogel obtained in step 2 is subjected to supercritical drying to obtain the target product clay-doped graphene airgel. The supercritical drying conditions are: temperature 45° C.; pressure 8.0 MPa; carbon dioxide supercritical drying for 12 hours. Halloysite clay-doped graphene airgel has good blockability, uniform internal microstructure, and excellent adsorption performance.
Embodiment 2
[0029] Step 1: Suspend 10ml of graphene oxide, add 5g of modified halloysite nanopowder to the graphene oxide suspension, and stir fully to obtain a uniform mixed solution;
[0030] Step 2, ultrasonically disperse the mixed solution prepared in step 1, and ultrasonically disperse it under 100% power for 30 minutes; then import it into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 160 degrees Celsius for 180 minutes to obtain a black block clay graphene hydrogel .
[0031] In step 3, the hydrogel obtained in step 2 is subjected to supercritical drying to obtain the target product clay-doped graphene airgel, and the supercritical drying conditions are: temperature 45° C.; pressure 10 MPa; carbon dioxide supercritical drying 10 h. Halloysite clay-doped graphene airgel has good blockability, uniform internal microstructure, and excellent adsorption performance.
Embodiment 3
[0033] Step 1: Suspend 10ml of graphene oxide, add 10g of modified halloysite nanopowder to the graphene oxide suspension, and stir fully to obtain a uniform mixed solution;
[0034] Step 2, ultrasonically disperse the mixed solution prepared in step 1, and ultrasonically disperse it under 80% power for 60 minutes; then import it into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 200 degrees Celsius for 60 minutes to obtain a black block clay graphene hydrogel .
[0035] In step 3, the hydrogel obtained in step 2 is subjected to supercritical drying to obtain the target product clay-doped graphene airgel, and the supercritical drying conditions are: temperature 40° C.; pressure 12 MPa; carbon dioxide supercritical drying for 8 hours. Halloysite clay-doped graphene airgel has good blockability, uniform internal microstructure, and excellent adsorption performance.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More