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A kind of high specific surface area kaolin nano material and preparation method thereof

A technology of high specific surface area and nano-materials, which is applied in the field of high specific surface area kaolin nano-materials and its preparation, can solve the problems of insignificant specific surface area of ​​kaolin materials and incapable of exfoliation of kaolin

Active Publication Date: 2021-07-06
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the sulfuric acid concentration is low, only the outer surface of the kaolin will be etched, and the kaolin cannot be effectively stripped.
Therefore, the effect of direct acid treatment on improving the specific surface area of ​​kaolin materials is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Choose the kaolin soil in Qingshuihe County in Inner Mongolia. First, 150 g of kaolin was added to 1350 ml of water, and the stirring speed was 800 rpm, the stirring time was 30 minutes, and the dispersion of 10% concentration was made; the dispersion was further dispersed under an outer cutting high speed dispersing machine. The speed is 1500 rpm, the dispersion time is 1 hour; then the dispersion is allowed to stand for 5 minutes, discard the lower quartz impurity and kaolin particles greater than 20 microns; the upper liquid settled for 78 minutes to obtain a particle size 5-20 microns of kaolin particles, then dried at 120 ° C for 12 hours, which is 19.8m than the surface area. 2 / g. After mixing 90 ml of dimethyl sulfoxide with 10 ml of water, 10 g of treated kaolin was added, and the reaction was stirred at 80 ° C for 24 hours, and the centrifugation was separated after natural cooling, the centrifugal speed was 6000 rpm, centrifugal time was 5 minutes. . The product...

Embodiment 2

[0014] After mixing the kaolin / dimethyl sulfone insertion layer made in Example 1 and 20 ml of 2.5 m sulfuric acid was mixed, 50 ° C was reacted for 24 hours, and then centrifuged after natural cooling, centrifugal rotation was 8000. Rotation / division, centrifugal time is 5 minutes. The product was washed 3 times, no water ethanol was washed once, and the specific surface area was 531.0m at 110 ° C for 24 hours. 2 Kaolin nanomaterials of / g.

Embodiment 3

[0016] After 2 g of the kaolin / dimethyl sulfone insertion layer, the kaolin / dimethyl sulfone insertion layer was mixed with 20 ml of 2.5 m sulfuric acid, and the reaction was reacted at 75 ° C for 24 hours, and the centrifugation was separated after natural cooling, the centrifugation speed was 8000. Rotation / division, centrifugal time is 5 minutes. The product was washed 3 times, and no water ethanol was washed once, and the specific surface area was 380.9m at 110 ° C for 24 hours. 2 Kaolin nanomaterials of / g.

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PUM

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Abstract

The invention discloses a high specific surface area kaolin nano material and a preparation method thereof, which is characterized in that the specific surface area of ​​the kaolin nano material can be 35.1-531.0 m 2 / g regulation. Its preparation method is to use natural massive kaolin as raw material, remove impurities such as quartz through crushing and sedimentation separation, then use small organic molecules to intercalate kaolin, and then use acid to treat kaolin intercalation complexes at different temperatures, so as to obtain Kaolin nanomaterials with high specific surface area. This product can be used in the production of adsorbents, catalysts, etc., which can enhance the adsorption performance and catalytic performance of the product.

Description

Technical field [0001] The present invention relates to a high ratio of clay mineral materials, especially a high ratio of kaolin nanomaterials and preparation methods thereof. Background technique [0002] Kaolin is a large inorganic non-metallic mineral in nature, widely used in ceramics, paper, coatings, flame retardant materials, catalysts. However, since the kaolin has a lower specific surface area, the adsorption activity is limited, and the application field has also been limited. For materials having layered structures, peeling is a very effective way to improve their specific surface area and physical chemical properties. A two-dimensional material excellent in performance can be obtained after the layered material is peeled off. Therefore, researchers have also made a lot of effort in terms of peeling of kaolin. In 2011, Japanese scholars Yoshiyuki Kuroda and his collaborators have reported a "one step" to peeling the kaolin, and got a kaolin nanolus with a one-dimensio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40
CPCC01B33/40C01P2006/12
Inventor 苏海全屈皓贺思慧刘瞳田佳欣张兵兵
Owner INNER MONGOLIA UNIVERSITY