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Hexagonal nano boron nitride preparation method based on cholate intercalation and ball-milling stripping

A nano-boron nitride, cholate technology, applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problems of low peeling efficiency, uneven quality and shape of nanomaterials, etc.

Inactive Publication Date: 2021-07-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The previous mechanical exfoliation method can quickly exfoliate bulk materials to produce nano-boron nitride sheets, but the exfoliation efficiency is low, and the quality and shape of the formed nanomaterials are not uniform, so it is necessary to achieve rapid and efficient preparation of high The quality of nano boron nitride is still a big challenge

Method used

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  • Hexagonal nano boron nitride preparation method based on cholate intercalation and ball-milling stripping
  • Hexagonal nano boron nitride preparation method based on cholate intercalation and ball-milling stripping
  • Hexagonal nano boron nitride preparation method based on cholate intercalation and ball-milling stripping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Ingredients, add 2g boron nitride and 2g SiC microspheres (as grinding balls) to the ball mill, then add 0.2g sodium cholate as intercalation agent, and water as solvent.

[0024] (2) Ball milling, put the prepared materials into the ball mill, adjust the speed to 150r / min, and ball mill for 15h.

[0025] (3) Ultrasonic. After the ball milling, perform ultrasonic at 500w for 10min.

[0026] (4) centrifuge, put the material finished by ultrasonic into the centrifuge, the rotating speed is 2200r / min, centrifugal 10min.

[0027] (5) Collecting, taking the supernatant from the centrifuged material and drying it as the final product.

Embodiment 2

[0029] (1) Ingredients, add 2g of boron nitride and 2g of SiC microspheres into the ball mill, then add 0.2g of sodium deoxycholate as an intercalation agent, and water as a solvent.

[0030] (2) Ball milling, put the prepared materials into the ball mill, adjust the speed to 250r / min, and ball mill for 10h.

[0031] (3) Ultrasound. After the ball milling, perform ultrasonication at 100w for 20min.

[0032] (4) centrifuge, put the material finished by ultrasonic into the centrifuge, the rotating speed is 1800r / min, centrifugal 20min.

[0033] (5) Collecting, taking the supernatant from the centrifuged material and drying it as the final product.

Embodiment 3

[0035] (1) Ingredients, add 2g of boron nitride and 3g of SiC microspheres into the ball mill, then add 0.2g of sodium taurocholate as an intercalation agent, and water as a solvent.

[0036] (2) Ball milling, put the prepared materials into the ball mill, adjust the speed to 200r / min, and ball mill for 12h.

[0037] (3) Ultrasonic. After the ball milling, perform ultrasonic at 300w for 15min.

[0038] (4) centrifuge, put the material finished by ultrasonic into the centrifuge, the rotating speed is 2000r / min, centrifugal 15min.

[0039] (5) Collecting, taking the supernatant from the centrifuged material and drying it as the final product.

[0040] Taking Examples 1-3 as the object of characterization, a small amount of centrifuged boron nitride supernatant was taken in a petri dish, and dried in an oven for 24 hours to obtain white boron nitride powder. The samples for infrared spectroscopy were prepared by the halide tablet method. Potassium bromide and boron nitride were...

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Abstract

The invention discloses a hexagonal nano boron nitride preparation method based on cholate intercalation and ball-milling stripping, which comprises the following steps: preparing a boron nitride material containing a cholate intercalator and water as a solvent, adding SiC balls or agate balls, stripping by using a ball-milling method, and finally assisting ultrasonic separation and differential centrifugation to prepare hexagonal nano boron nitride. The stripping method provided by the invention has the advantages of low required temperature, simple equipment, no need of high temperature, low stripping cost and no need of further operation, has great advantages in production cost and production equipment, is beneficial to quickly and efficiently preparing the two-dimensional hexagonal nano boron nitride, and is expected to realize industrial production of the two-dimensional hexagonal nano boron nitride.

Description

technical field [0001] The invention is a method for preparing hexagonal nano-boron nitride based on cholate intercalation and ball milling exfoliation, which belongs to the field of nano-material preparation, has great advantages in production cost and production equipment, and is expected to realize industrial production in the future. Background technique [0002] In recent years, two-dimensional nanomaterials continue to receive international research attention, and there are corresponding researches in the fields of energy storage devices and photoelectric conversion. Two-dimensional nanomaterials such as graphene, boron nitride, and metal sulfides have attracted much research interest due to their unique structural properties. Due to their unique structure and anisotropy, these layered materials can be regulated by dimensionality reduction, intercalation and functional modification. [0003] Due to the structure of the boron nitride material, the interaction force con...

Claims

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Application Information

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IPC IPC(8): C01B21/064
CPCC01B21/0648C01P2002/82C01P2004/04C01P2002/70C01P2004/20C01P2004/62
Inventor 冯奕钰周钰张乐康严前程马馨茹何思佳
Owner TIANJIN UNIV
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