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A kind of three-dimensional porous boron carbon nitrogen material and its preparation method and application

A three-dimensional porous, boron-carbon-nitrogen technology, applied in the field of nanomaterial preparation and photocatalysis, to achieve the effects of mild and controllable conditions, low price and stable catalyst

Active Publication Date: 2021-03-30
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, reports on boron carbon nitrogen (BCN) materials are mainly focused on one-dimensional (1D) structures, such as boron carbon nitrogen nanosheets (Nat. Commun., 2015, 6, 7698; Chem. Eur.J. 2016, 22, 7134-7140), two-dimensional (2D) structures, such as boron carbon nitride nanotubes (Chem. Commun., 2017, 53, 11988-11991; J. Am. Chem. Soc. 2007, 129(6), 1705 −1716; J. Am.Chem. Soc. 2006, 128, 6530−6531), the corresponding three-dimensional porous boron carbon nitrogen structure is rarely reported

Method used

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  • A kind of three-dimensional porous boron carbon nitrogen material and its preparation method and application
  • A kind of three-dimensional porous boron carbon nitrogen material and its preparation method and application
  • A kind of three-dimensional porous boron carbon nitrogen material and its preparation method and application

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Effect test

Embodiment 1

[0024] Take 0.5 g of boric acid, 1 g of urea and 2.5 g of starch in a 25 mL beaker, add 5 mL of pure water and 2.5 g of sodium chloride, and dissolve them by ultrasonic waves, and then stand at room temperature and pressure for 3 h to obtain a three-dimensional Porous hydrogel precursor, take out the precursor, place it in a corundum ark, and put it into a horizontal high-temperature tube furnace. After heating up to 1000 ℃ and heat treatment for 5 h, the three-dimensional porous boron carbon nitrogen material can be obtained.

Embodiment 2

[0026] Take 1 g of boric acid, 2 g of urea and 5 g of starch in a 25 mL beaker, add 10 mL of pure water and 5 g of sodium chloride, and dissolve them by ultrasonic waves, and then stand at room temperature and pressure for 4 h to obtain a three-dimensional The porous hydrogel precursor was taken out, placed in a corundum ark, and placed in a horizontal high-temperature tube furnace, under an ammonia atmosphere (flow rate of 200 mL / min), at a heating rate of 5 ℃ / min After heating up to 1250 ℃ and heat treatment for 5 h, the three-dimensional porous boron carbon nitrogen material can be obtained.

Embodiment 3

[0028] Take 1 g of boric acid, 2 g of urea and 5 g of starch in a 25 mL beaker, add 10 mL of pure water and 3 g of sodium chloride, and dissolve them by ultrasonic waves, and then stand at room temperature and pressure for 2 h to obtain a three-dimensional The porous hydrogel precursor was taken out, placed in a corundum ark, and placed in a horizontal high-temperature tube furnace, under an ammonia atmosphere (flow rate: 300 mL / min), at a heating rate of 5 °C / min After heating up to 1100 ℃ and heat treatment for 8 h, the three-dimensional porous boron carbon nitrogen material can be obtained.

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Abstract

The invention belongs to the technical field of nanomaterial preparation and relates to a three-dimensional porous boron carbon nitrogen material, a preparation method thereof and its application in the field of photocatalysis. This method uses boric acid, urea and starch as raw materials and mixes them with sodium chloride salt, then adds an appropriate amount of water and ultrasonics to dissolve it, mix it evenly, and leave it to stand at normal temperature and pressure. After a few hours, a precursor with a three-dimensional porous structure will be formed. The body is then thermally polymerized at high temperature in an ammonia atmosphere to synthesize a three-dimensional porous boron carbon-nitrogen material. The preparation method provided by the invention has simple process, cheap materials, and mild and controllable conditions. The obtained boron carbon nitrogen material has a significantly increased specific surface area, smaller pore size, significantly improved charge separation, has good photocatalytic properties, and has broader applications in the fields of photoelectricity, catalysis, photodegradation of organic pollutants, adsorption, and energy storage. Applications.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a three-dimensional porous boron carbon nitrogen material, a preparation method thereof and an application thereof in the field of photocatalysis. Background technique [0002] Three-dimensional porous (3D porous) materials have received extensive attention and research in recent years due to their low density, high porosity, better thermal / chemical stability and higher specific surface area (Chem. Rev., 2014, 114 , 9487-9558; Chem. Rev. 2015, 115, 6265-6311; Chem. Soc. Rev. 2016, 45, 5541-5588; Energy Environ. Sci. 2013, 6, 41-53). Based on these characteristics, three-dimensional porous materials have been widely used in various fields, such as capacitors with ultra-high performance (Energy Environ. Sci. 2013, 6, 2497-2504; ACS Nano 2013, 7, 9366-9374), electro- Color-changing devices (Adv. Funct. Mater. 2015, 25, 6900-6905), photo / electrocatalysts (ACS Appl. Ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/082B01J27/24
CPCC01B21/0828B01J27/24C01P2004/03C01P2002/72C01P2002/82B01J35/39
Inventor 王心晨罗志珊周敏张明文陈刘勇
Owner FUZHOU UNIV
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