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A kind of preparation method of biobr/black phosphorene heterojunction nanocomposite material

A nanocomposite material, black phosphorene technology, applied in the field of environmental pollution control, can solve the problems of easy oxidation reaction, poor chemical stability, etc., achieve high photogenerated electron-hole separation ability, high redox ability, improve interfacial phase capacitive effect

Inactive Publication Date: 2021-07-16
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, black phosphorus has poor chemical stability and is prone to oxidation reactions in air
However, the process of constructing BiOBr / black phosphorene heterojunction nanocomposites using hydroxyl-induced assisted solvothermal to realize the interfacial co-assembly of BiOBr and black phosphorene has not been reported.

Method used

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  • A kind of preparation method of biobr/black phosphorene heterojunction nanocomposite material
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  • A kind of preparation method of biobr/black phosphorene heterojunction nanocomposite material

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Effect test

Embodiment 1

[0027] A method for preparing a BiOBr / black phosphorene heterojunction nanocomposite material.

[0028] (1) With 2.91g of Bi(NO 3 ) 3 ·5H 2 O and 0.714g of KBr as raw materials were dissolved in 35mL of ethylene glycol solvent, and the KBr solution was added dropwise to Bi(NO 3 ) 3 solution and magnetically stirred for 1 h; put the mixed solution into a hydrothermal kettle, and dilute to 80% with ethylene glycol, then use solvent heat to react at 120°C for 8 h; cool to room temperature after the reaction, and wash with absolute ethanol 3 times and dried in an oven at 60°C for 12h to prepare flower-like BiOBr;

[0029] (2) Using black phosphorus block as raw material and NMP as solvent, black phosphorene was prepared by ultrasonic stripping combined with vacuum drying under the protection of atmosphere. Take 0.08g of ground black phosphorus tablets and put them into an Erlenmeyer flask filled with argon, add 20ml of NMP into the Erlenmeyer flask, seal the mouth, and ultras...

Embodiment 2

[0032] A method for preparing a BiOBr / black phosphorene heterojunction nanocomposite material.

[0033] (1) With 4.16g of Bi(NO 3 ) 3 ·5H 2 O and 1.428g of KBr were used as raw materials, respectively dissolved in 50mL of ethylene glycol solvent, and the KBr solution was added dropwise to Bi(NO 3 ) 3 solution and magnetically stirred for 1.5h; put the mixed solution into a hydrothermal kettle, and dilute to 80% with ethylene glycol, then use solvent heat to react at 120°C for 9h; Washing 3 times and drying in an oven at 60°C for 14 hours to prepare flower-like BiOBr;

[0034] (2) Using black phosphorus block as raw material and NMP as solvent, black phosphorene was prepared by ultrasonic stripping combined with vacuum drying under the protection of atmosphere. Take 0.12g of ground black phosphorus tablets and put them into an Erlenmeyer flask filled with argon, add 30ml of NMP into the Erlenmeyer flask, seal the mouth, and ultrasonicate at 10°C for 15h; put the ultrasonic...

Embodiment 3

[0037] A method for preparing a BiOBr / black phosphorene heterojunction nanocomposite material.

[0038] (1) With 5.82g of Bi(NO 3 ) 3 ·5H 2 O and 1.02g of KBr were used as raw materials, respectively dissolved in 70mL of ethylene glycol solvent, and the KBr solution was added dropwise to Bi(NO 3 ) 3 solution and magnetically stirred for 2h; put the mixed solution into a hydrothermal kettle, and dilute to 80% with ethylene glycol, and then use solvent heat to react at 120°C for 10h; cool to room temperature after the reaction, and wash with absolute ethanol 3 times and dried in an oven at 60°C for 18 hours to prepare flower-like BiOBr;

[0039](2) Using black phosphorus block as raw material and NMP as solvent, black phosphorene was prepared by ultrasonic stripping combined with vacuum drying under the protection of atmosphere. Take 0.16g of ground black phosphorus flakes and put them into an Erlenmeyer flask filled with argon, add 40ml of NMP into the Erlenmeyer flask, se...

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Abstract

The invention discloses a method for preparing a BiOBr / black phosphorene heterojunction nanocomposite material. The BiOBr / black phosphorene heterojunction nanocomposite material is prepared by co-assembling with a hydroxyl-induced auxiliary solvent thermal interface. The technical method steps are as follows: Bi(NO 3 ) 3 ·5H 2 O and KBr were used as raw materials, ethylene glycol was used as solvent, and flower-like BiOBr was prepared by solvothermal reaction; black phosphorus block was used as raw material, NMP was used as solvent, and black phosphorene was prepared by ultrasonic stripping combined with vacuum drying; BiOBr and black phosphorene were prepared in Solvothermal treatment was carried out in ethanol solvent, and BiOBr / black phosphorene heterojunction nanocomposites were prepared by hydroxyl-induced assisted solvent-thermal interfacial co-assembly. The invention has the advantages of simple preparation process and low production cost, and the obtained BiOBr / black phosphorene heterojunction nanocomposite material has strong visible light response ability, good interface coupling and has the advantages of direct Z-type heterojunction, which is expected to be applied in optical Catalysts degrade organic pollutants.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to a preparation method of a BiOBr / black phosphorene heterojunction nanocomposite material. Background technique [0002] Nano-BiOBr is a new type of semiconductor material, which has high catalytic activity in the photocatalytic degradation of organic pollutants due to its unique characteristics such as small forbidden band width and strong response to visible light. At present, a variety of methods have successfully prepared BiOBr nanomaterials and a large number of reports on the degradation of organic pollutants by BiOBr. However, due to the limitation of its visible light catalytic efficiency, the practical application of BiOBr nanomaterials alone is relatively small. [0003] In order to solve the key scientific problems such as the easy recombination of photogenerated electrons and holes in traditional single photocatalytic materials, and their insuffi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/06C02F1/72C02F101/30
CPCB01J27/06B01J35/004C02F1/725C02F2101/308
Inventor 李喜宝熊杰黄军同冯志军康棒棒刘积有李海
Owner NANCHANG HANGKONG UNIVERSITY
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