Boron carbonitride nanosheet as well as preparation method and application thereof

A technology of nitrides and nanosheets, applied in the field of nanomaterials, can solve the problems of not extensive sources, time-consuming, complicated operation of hydrothermal method, etc.

Pending Publication Date: 2021-07-30
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Two-dimensional BCN shows potential applications ranging from electronics to catalysis, however, the methods for preparing BCN are time-consuming and require high chemical vapor deposition equipment, etc., or are prepared by hydrothermal method, which consumes a lot of energy.
This method takes a long time and cannot be produced in large quantities. The production is troublesome, and the raw materials are required to be

Method used

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  • Boron carbonitride nanosheet as well as preparation method and application thereof
  • Boron carbonitride nanosheet as well as preparation method and application thereof
  • Boron carbonitride nanosheet as well as preparation method and application thereof

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preparation example Construction

[0050]Such as figure 1 Shown, the preparation method of boron carbon nitride nanosheet of the present invention comprises the steps:

[0051] (1), take boron source, carbon source and nitrogen source and mix, obtain mixed powder;

[0052] (2), the mixed powder is stirred and dried, and placed in a planetary ball mill for uniform grinding to obtain an amorphous phase precursor;

[0053] (3) The amorphous phase precursor is degassed in a tube furnace and heat-treated at 800-1200° C. to obtain treated boron carbon nitride nanosheets (ie, boron-nitrogen-carbon materials);

[0054] (4) The borocarbonitride nanosheets treated in step (3) are ball milled in a planetary ball mill, and then purified to obtain borocarbonitride nanosheets.

[0055] Wherein, in the step (1), the boron source, the carbon source and the nitrogen source are the element mass ratios of B, C and N being 1:(0.05-1):(0.05-1).

[0056] (carbon source)

[0057] In step (1), the carbon source is selected from on...

Embodiment 1

[0084] The preparation method of the boron carbon nitride nanosheet of the present embodiment comprises the following steps:

[0085] (1), after mixing 2.06g boric acid, 2g urea and 0.2g carbon black, obtain mixed powder;

[0086] (2) Dry the mixed powder in an oven at 70°C for 30 minutes, and place it in a planetary ball mill at a speed of 500rmp, turn it for 20 minutes, stop for 5 minutes, turn it for another 20 minutes, mix evenly, grind finely, and obtain an amorphous phase precursor;

[0087] (3), the amorphous phase precursor is carried out degassing treatment, in the N of 100mL / min 2 Heat treatment at 1100°C for 2 hours under the protection of air flow, and cool down;

[0088] (4), place the product of step (3) in the planetary ball mill with a rotating speed of 500rmp, turn for 20min, stop for 5min, then turn for 20min to mix evenly, and grind finely;

[0089] (5) acid treatment with 10 wt% hydrochloric acid solution at room temperature; washing with water and ethano...

Embodiment 2

[0091] The preparation method of the boron carbon nitride nanosheet of the present embodiment comprises the following steps:

[0092] (1), after mixing 2.06g boric acid, 2g urea and 0.2g carbon black, obtain mixed powder;

[0093] (2) Dry the mixed powder in an oven at 70°C for 30 minutes, and place it in a planetary ball mill at a speed of 500rmp, turn it for 20 minutes, stop for 5 minutes, turn it for another 20 minutes, mix evenly, grind finely, and obtain an amorphous phase precursor;

[0094] (3), the amorphous phase precursor is carried out degassing treatment, in the N of 100mL / min 2 Heat treatment at 900°C for 2 hours under the protection of air flow, and cool down;

[0095] (4), put the product of step (3) in the ball mill at a speed of 500rmp, turn for 20min, stop for 5min, then turn for 20min to mix evenly, and grind finely;

[0096] (5) acid treatment with 10 wt% hydrochloric acid solution at room temperature; washing with water and ethanol, ultrasonic stripping;...

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Abstract

The invention provides a boron carbonitride nanosheet as well as a preparation method and application thereof, the preparation method comprises the following steps: mixing a boron source, a carbon source and a nitrogen source, then stirring, drying and grinding to obtain an amorphous phase precursor, and then carrying out heat treatment, ball milling and purification. The boron carbonitride nanosheet disclosed by the invention can be applied to a supercapacitor electrode material, a heat-insulating and wave-absorbing material or a catalytic adsorption material; according to the preparation method disclosed by the invention, through ball-milling high-temperature heat treatment, the process of firstly dispersing and then separating out crystals in an aqueous solution or other solvents is omitted, so that the energy consumption of solvent evaporation is saved, and the production cost is reduced; and by optimizing the manufacturing process, the process of dissolving the raw materials in water or other solvents and then separating out is omitted, the solid raw materials are mixed and then placed in the planetary ball mill to be uniformly and finely mixed, the contact area of the raw materials is increased, the reaction is expanded, and therefore the reaction rate and the reaction degree are increased.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a boron carbonitride nanosheet and its preparation method and application. Background technique [0002] With the rapid development of electronic sensors, flexible displays, health monitors and wearable electronic devices, as well as the development of new energy vehicles and new weapons, wearable and energy storage devices with fast storage and release of energy are becoming more and more popular among researchers from all walks of life. focus on. Among a variety of energy storage devices, supercapacitors have the advantages of high specific power density, fast charge and discharge speed, and good cycle stability. They are considered to be very promising energy storage devices in future energy storage applications. Electrodes are the core of supercapacitors. device has been extensively studied. Two-dimensional materials are currently widely used materials, tw...

Claims

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Application Information

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IPC IPC(8): C01B21/082B01J20/02B01J20/28B01J20/30B01J27/24C09K3/00H01G11/30H01G11/24H01G11/86B82Y30/00B82Y40/00
CPCC01B21/0828H01G11/30H01G11/24H01G11/86B01J20/02B01J20/28004B01J27/24B01J35/023C09K3/00B82Y30/00B82Y40/00C01P2004/62Y02E60/13
Inventor 于文杰辛斌杰罗健沈冬冬孔方圆余淼刘毅袁秀文范明珠朱润虎
Owner SHANGHAI UNIV OF ENG SCI
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