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Preparation method of hexagonal boron nitride ceramic material stable silver carbonate semiconductor

A technology of hexagonal boron nitride and ceramic materials, applied in the direction of light water/sewage treatment, etc., can solve the problems of low product yield and specific surface, unstable properties of reaction precursors, environmental and safety threats, etc. Short time, less environmental pollution, and the effect of improving stability

Inactive Publication Date: 2015-08-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some disadvantages in these preparation methods, such as the unstable properties of the reaction precursors, which are toxic and explosive, which pose a serious threat to the environment and safety, while the product yield and specific surface area are not very high.

Method used

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  • Preparation method of hexagonal boron nitride ceramic material stable silver carbonate semiconductor
  • Preparation method of hexagonal boron nitride ceramic material stable silver carbonate semiconductor
  • Preparation method of hexagonal boron nitride ceramic material stable silver carbonate semiconductor

Examples

Experimental program
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Effect test

Embodiment example 1 6

[0039] Implementation Case 1 Preparation of Hexagonal Boron Nitride and Boron Nitride / Silver Carbonate Nanocomposite

[0040] CO(NH at a molar ratio of 24:1 2 ) 2 and H 3 BO 4 Put it into a beaker, dissolve it completely in deionized water under the action of ultrasound, then evaporate the solution to dryness in a water bath at 65°C under magnetic stirring, then put the evaporated sample in an alumina crucible, and place it in a tube In a nitrogen atmosphere, the temperature was raised to 900°C at a rate of 5°C / min and kept for 5 hours. After the temperature of the tube furnace dropped to room temperature, the sample was taken out and ground to obtain white boron nitride powder.

[0041] Take 0.015g of graphite phase boron nitride and uniformly disperse in deionized water under the action of ultrasound, then add 0.6163g of silver nitrate to obtain a uniformly dispersed solution under the action of ultrasound, add 1mL of 0.5mol / L ammonia solution, after stirring for 20mi...

Embodiment example 2 6

[0042] Implementation Case 2 Preparation of Hexagonal Boron Nitride and Boron Nitride / Silver Carbonate Nanocomposite

[0043] CO(NH at a molar ratio of 24:1 2 ) 2 and H 3 BO 4 Put it into a beaker, dissolve it completely in deionized water under the action of ultrasound, then evaporate the solution to dryness in a water bath at 65°C under magnetic stirring, then put the evaporated sample in an alumina crucible, and place it in a tube In a nitrogen atmosphere, the temperature was raised to 700°C at a rate of 3°C / min and kept for 3 hours. After the temperature of the tube furnace dropped to room temperature, the sample was taken out and ground to obtain white boron nitride powder.

[0044] Take 0.03g of graphite phase boron nitride and uniformly disperse in deionized water under the action of ultrasound, then add 0.6163g of silver nitrate to obtain a uniformly dispersed solution under the action of ultrasound, add 0.5mL of 0.5mol / L ammonia solution, after stirring for 20min...

Embodiment example 3 6

[0045] Implementation Case 3 Preparation of Hexagonal Boron Nitride and Boron Nitride / Silver Carbonate Nanocomposite

[0046] CO(NH at a molar ratio of 24:1 2 ) 2 and H 3 BO 4 Put it into a beaker, dissolve it completely in deionized water under the action of ultrasound, then evaporate the solution to dryness in a water bath at 65°C under magnetic stirring, then put the evaporated sample in an alumina crucible, and place it in a tube In a nitrogen atmosphere, the temperature was raised to 1100°C at a rate of 8°C / min and kept for 7 hours. After the temperature of the tube furnace dropped to room temperature, the sample was taken out and ground to obtain white boron nitride powder.

[0047] Take 0.0088g of graphite phase boron nitride and uniformly disperse in deionized water under the action of ultrasound, then add 0.6163g of silver nitrate to obtain a uniformly dispersed solution under the action of ultrasound, add 1.5mL of 0.5mol / L ammonia solution, after stirring for ...

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Abstract

The invention relates to the field of material preparation, and specifically discloses a preparation method of a hexagonal boron nitride ceramic material stable silver carbonate semiconductor. The method comprises the following steps: (1) graphite-phase hexagonal boron nitride nano-sheets are prepared; (2) a boron nitride / silver carbonate composition is prepared with a precipitation method, wherein the prepared hexagonal boron nitride nano-sheets are subjected to ultrasonic dispersion in deionized water; silver nitrate is added; a sodium bicarbonate solution is added drop by drop under a magnetic stirring condition; deionized water and anhydrous ethanol are used in centrifugation and washing; and drying is carried out, such that a target product is obtained. According to the invention, the graphite-phase hexagonal boron nitride is prepared with a high-temperature calcination method, and is used as a carrier for preparing the boron nitride / silver carbonate composite material with a simple precipitation method, such that the obtained composite material has substantially improved activity and stability. The material has an important significance in synergetic catalysis and stable semiconductor.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing a hexagonal boron nitride ceramic material to stabilize a silver carbonate semiconductor. technical background [0002] Boron nitride is an important ceramic compound with many excellent physical and chemical properties, such as high thermal conductivity, high chemical stability, excellent oxidation resistance, low density, etc. Radiation and other aspects have broad application prospects. Boron nitride has a variety of structures, mainly hexagonal, cubic, and trigonal. Among them, hexagonal boron nitride ( h -BN) in the B-N key is sp 2 Hybrid bonded, very similar to the layered structure of graphite, often referred to as "white graphite". In recent years, graphene has been widely used in the field of catalysis due to its high specific surface and other properties, similar to graphite structure h -BN also has high specific sur...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30
Inventor 吕晓萌汪家喜刘军
Owner JIANGSU UNIV
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