Method for preparing mesoporous boron nitride by urea-assisted heat peeling of boron nitride

A technology of boron nitride and auxiliary heat, applied in chemical instruments and methods, nitrogen compounds, alkali metal oxides/hydroxides, etc. High adsorption performance of boron and other problems, to achieve good innovation and application prospects, simple process, low price effect

Inactive Publication Date: 2017-10-20
HOHAI UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Technical problem to be solved: This application mainly proposes a method for preparing mesoporous boron nitride by urea-assisted thermal exfoliation of boron nitride, which solves the problem of low adsorption performance of boron nitride materials and high adsorption capacity of mesoporous boron nitride in the prior art. Performance and urea will release ammonia gas and other technical problems under heating conditions

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  • Method for preparing mesoporous boron nitride by urea-assisted heat peeling of boron nitride
  • Method for preparing mesoporous boron nitride by urea-assisted heat peeling of boron nitride

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Embodiment 1

[0035] Such as figure 1 As shown, a method for preparing mesoporous boron nitride by urea-assisted thermal exfoliation of boron nitride The specific preparation method includes the following:

[0036] Step 1: Grind 8 g of urea and 24 g of boron trioxide in an agate mortar for 30 minutes to mix them evenly.

[0037] The second step: put the uniformly mixed urea-boron trioxide mixture in the alumina crucible, and cover the crucible lid.

[0038] Step 3: Put the crucible in a vacuum atmosphere furnace, raise the temperature to 1100°C at a rate of 10°C / min, keep the temperature for 4 hours and then cool down to room temperature naturally.

[0039] Step 4: Take out the sample and wash it 5 times with deionized water to remove unreacted boron trioxide.

[0040] Step 5: Put the treated sample in an oven at 100°C to dry for 12 hours, take out the dried sample and grind it into powder in a mortar, and the obtained sample is a white boron nitride powder material.

[0041] Step 6: Gri...

Embodiment 2

[0047] Such as figure 1 As shown, a method for preparing mesoporous boron nitride by urea-assisted thermal exfoliation of boron nitride The specific preparation method includes the following:

[0048] Step 1: Grind 8 g of urea and 32 g of boron trioxide in an agate mortar for 20 minutes to mix them evenly.

[0049] The second step: put the uniformly mixed urea-boron trioxide mixture in the alumina crucible, and cover the crucible lid.

[0050] Step 3: Then put the crucible in a vacuum atmosphere furnace, raise the temperature to 1100°C at a rate of 10°C / min, keep the temperature for 4 hours and then cool down to room temperature naturally.

[0051] Step 4: Take out the sample and wash it 3 times with deionized water to remove unreacted boron trioxide.

[0052] Step 5: Put the treated sample in an oven at 100°C to dry for 12 hours, take out the dried sample and grind it into powder in a mortar, and the obtained sample is a white boron nitride powder material.

[0053] Step 6...

Embodiment 3

[0059] A method for preparing mesoporous boron nitride by urea-assisted thermal exfoliation of boron nitride The specific preparation method comprises the following steps:

[0060] Step 1: Grind 8 g of urea and 32 g of boron trioxide in an agate mortar for 30 minutes to mix them evenly.

[0061] The second step: put the uniformly mixed urea-boron trioxide mixture in the alumina crucible, and cover the crucible lid.

[0062] Step 3: Then put the crucible in a vacuum atmosphere furnace, heat up to 1000°C at a rate of 10°C / min, keep the temperature for 3 hours and then cool down to room temperature naturally.

[0063] Step 4: Take out the sample and wash it 4 times with deionized water to remove unreacted boron trioxide.

[0064] Step 5: Put the treated sample in an oven at 100°C to dry for 12 hours, take out the dried sample and grind it into powder in a mortar, and the obtained sample is a white boron nitride powder material.

[0065] Step 6: Grind 0.25g of boron nitride and ...

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Abstract

The invention provides a method for preparing mesoporous boron nitride by urea-assisted heat peeling of the boron nitride. The method comprises the following steps: firstly, preparing a boron nitride material; secondly, uniformly mixing urea and the boron nitride according to the mass ratio of 1 to 40 and then calcining at 600 DEG C to prepare a mesoporous boron nitride material. A neutral red uptake test shows that the uptake amount on neutral red of the prepared high-absorbability mesoporous boron nitride is 898.50mg / g and is 44.4 times as much as the neutral red uptake amount of the boron nitride of 20.22mg / g. The method is simple to operate and low in cost and has a good application prospect in the aspect of treating dyestuff wastewater.

Description

technical field [0001] The invention belongs to the field of boron nitride materials and wastewater purification, and in particular relates to a method for preparing mesoporous boron nitride by urea-assisted thermal exfoliation of boron nitride. Background technique [0002] Boron nitride is a synthetic non-oxide material with excellent physical and chemical properties such as oxidation resistance, high temperature resistance, and chemical corrosion resistance. It is widely used in optoelectronic devices, functional composite materials, hydrogen storage, and catalysis. [Zhao Zehua, Wu Xiangfeng, Fu Shida, Yu Xiaoying, Zheng Sensen. Progress in the preparation and application of boron nitride. China Powder Industry. 2015, 3, 7-12; Liu Chuang, Zhang Li, Li Ping, Chen Yongan, Cui Wenwen , Zhang Hailin. Research progress on exfoliation preparation technology of boron nitride two-dimensional nanomaterials. Materials Engineering. 2016, 44, 122-128]. Highly adsorbable boron nitr...

Claims

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Application Information

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IPC IPC(8): C01B21/064B01J20/28B01J20/02B01J20/30
CPCC01B21/0648B01J20/0259B01J20/28083C01P2002/72
Inventor 郭勇王汝霞饶磊王沛芳王超
Owner HOHAI UNIV
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