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Doped hexagonal boron nitride nano sheet, preparation method thereof, catalyst using same as carrier, and applications thereof

A technology of hexagonal boron nitride and nanosheets is applied in physical/chemical process catalysts, chemical instruments and methods, nanotechnology and other directions to achieve the effects of improving catalytic activity, simple post-processing and high purity

Active Publication Date: 2016-02-03
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first object of the present invention is to provide a doped hexagonal boron nitride nanosheet and its preparation method to solve the existing problems

Method used

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  • Doped hexagonal boron nitride nano sheet, preparation method thereof, catalyst using same as carrier, and applications thereof
  • Doped hexagonal boron nitride nano sheet, preparation method thereof, catalyst using same as carrier, and applications thereof
  • Doped hexagonal boron nitride nano sheet, preparation method thereof, catalyst using same as carrier, and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing carbon-doped boron nitride nanosheets (CBN):

[0026] Take 0.31g of boric acid, 0.78g of perylenetetracarboxylic anhydride, and 7.2g of urea into a 100mL flask, then add an appropriate amount of distilled water, stir for 0.5h, spin evaporate to remove water, and dry at 65°C overnight. After the obtained solid was ground evenly, it was put into a tube furnace. Under an inert atmosphere, the temperature was programmed to 900 °C and maintained at this temperature for 3 h. After the reaction, cool to room temperature under the protection of an inert gas, take out the product, grind it, and boil it in hot water at 90°C for 0.5-1h. Filter while hot, wash several times with plenty of hot water and 95% ethanol successively. Finally, the filter cake was dried in a vacuum oven and weighed.

Embodiment 2

[0028] A method for preparing phosphorus-doped boron nitride nanosheets (PBN):

[0029] Take 0.62g of boric acid, 0.31g of red phosphorus, and 7.2g of urea into a 100mL flask, then add an appropriate amount of distilled water, stir for 0.5h, then spin evaporate to remove water, and dry at 65°C overnight. After the obtained solid was ground evenly, it was put into a tube furnace. In an inert atmosphere, the temperature was programmed to 1000 °C and maintained at this temperature for 3 h. After the reaction, cool to room temperature under the protection of an inert gas, take out the product, grind it, and boil it in hot water at 90°C for 0.5-1h. Filter while hot, wash several times with a lot of hot water, toluene and 95% ethanol successively. Finally, the filter cake was dried in a vacuum oven and weighed. The PBN nanosheets were tested by field emission scanning electron microscopy (FESEM). Such as figure 1 As shown, PBN nanosheets have few layers, small thickness, high...

Embodiment 3

[0031] A method for preparing carbon-doped boron nitride nanosheets (CBN):

[0032] Take 0.11g of boron, 0.78g of perylenetetracarboxylic anhydride, and 7.2g of urea into a 100mL flask, then add an appropriate amount of distilled water, stir for 0.5h, then spin evaporate to remove water, and dry at 65°C overnight. After the obtained solid was ground evenly, it was put into a tube furnace. Under an inert atmosphere, the temperature was programmed to 900 °C and maintained at this temperature for 3 h. After the reaction, cool to room temperature under the protection of an inert gas, take out the product, grind it, and boil it in hot water at 90°C for 0.5-1h. Filter while hot, wash several times with plenty of hot water and 95% ethanol successively. Finally, the filter cake was dried in a vacuum oven and weighed.

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Abstract

The invention relates to a doped hexagonal boron nitride nano sheet, a preparation method thereof, a catalyst using the same as the carrier, and applications thereof. The preparation method comprises the following steps: adding a single substance or compound of hetero atoms, a single substance or compound of boron, and a nitrogen compound into water, evenly mixing, drying to remove water; then grinding the solid, placing the powder in a tubular furnace, introducing inert gas into the tubular furnace, heating the tubular furnace to a temperature of 800 to 1200 DEG C by program to carry out reactions, after reactions, cooling to the room temperature; grinding the reaction products, then boiling the grinded products in hot water, filtering when the water is still hot, washing the filter residue by hot water and ethanol, and drying. The doped hexagonal boron nitride nano sheet is taken as the carrier to prepare a catalyst, the active components loaded on the carrier can be one or more of transition metals, and the catalyst is used to catalyze organic reactions. A high temperature pyrolysis method is adopted, and the controllable preparation of nano material is achieved through controlling the ratio of each element in raw materials. The method is simple, the operation is easy, and the yield is high. The doped hexagonal boron nitride nano sheet can be used as the catalyst carrier, and is capable of improving the dispersity and catalytic activity of metal nano particles.

Description

technical field [0001] The present invention relates to the field of preparation of nanomaterials and the field of catalytic technology, in particular to doped hexagonal boron nitride nanosheets and a preparation method thereof, and to a catalyst prepared by using the doped hexagonal boron nitride nanosheets as a carrier, which is used to catalyze organic reaction. Background technique [0002] Hexagonal boron nitride (h-BN) and graphene are two structurally similar inorganic materials. Graphene is a single layer of graphite, which is composed of carbon atoms arranged through sp2 hybridization, and is a material with a planar hexagonal honeycomb lattice. Widely used in electronic devices, sensors, catalysts, supercapacitors, protective layers and other fields. h-BN, a typical III-V compound, is white, also known as "white graphene". Each layer is composed of boron and nitrogen atoms arranged alternately, extending infinitely in the two-dimensional direction to form a hexa...

Claims

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Application Information

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IPC IPC(8): C01B21/064B82Y30/00B01J27/24
Inventor 鲁福身叶志良付钦瑞孟园方子琳
Owner SHANTOU UNIV
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