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Porous and high-specific-surface-area bismuth-nanoparticle-modified nitrogen-doped carbon nanosheet material and a preparation method and application thereof

A high specific surface area, nitrogen-doped carbon technology, applied in the field of nanomaterials, nitrogen-doped carbon nanomaterials, can solve the problems of small surface area, increased cost, cumbersome steps, etc., to achieve stable structure and performance, suitable for large-scale production, Simple operation effect

Active Publication Date: 2018-03-23
GUANGZHOU INGSENS SENSOR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This conventional preparation method has a complicated operation process and cumbersome steps, which limits its wide application.
Moreover, other substances are used as nitrogen sources, which not only increases the cost, but also easily causes uneven mixing, small surface area, and finally uneven nitrogen doping
At the same time, carbon nanosheet framework materials with higher nitrogen doping amount and high specific surface area have not been reported or disclosed in literature and patents.

Method used

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  • Porous and high-specific-surface-area bismuth-nanoparticle-modified nitrogen-doped carbon nanosheet material and a preparation method and application thereof
  • Porous and high-specific-surface-area bismuth-nanoparticle-modified nitrogen-doped carbon nanosheet material and a preparation method and application thereof
  • Porous and high-specific-surface-area bismuth-nanoparticle-modified nitrogen-doped carbon nanosheet material and a preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0035] A method for preparing a nitrogen-doped carbon nanosheet material modified by bismuth nanoparticles with a porous surface and high specific surface area, comprising the following steps:

[0036] (1) Use 0.5 g of polyvinylpyrrolidone K28 as a carbon source and nitrogen source, add 50 mL of ethylene glycol (carbon source) to fully dissolve, and obtain a 0.01 g / L nitrogen source solution;

[0037] (2) Add 0.05 g of bismuth nitrate to the nitrogen source solution obtained in step (1), stir and adjust the pH value to 5.5 with acetic acid, at this time, the bismuth nitrate is completely dissolved to obtain a mixed solution;

[0038] (3) Place the mixed solution obtained in step (2) in an electric blast drying oven at 110°C for 14 hours until a pale yellow solid precursor is obtained;

[0039] (4) Grind the obtained light yellow solid precursor into a fine powder and put it into a porcelain boat. Under the condition of nitrogen protection with a flow rate of 40mL / min, place it...

Embodiment 2

[0044] A method for preparing a nitrogen-doped carbon nanosheet material modified with bismuth nanoparticles with a porous surface and high specific surface area, specifically comprising the following steps:

[0045] With 1.0g of polyvinylpyrrolidone K30 as carbon source and nitrogen source, add 10mL of water to fully dissolve in the beaker, then add 5g of bismuth acetate to the beaker, stir and adjust the pH value of the mixed solution to 4.5 with nitric acid. Bismuth is completely dissolved. Put the prepared solution in an electric blast drying oven at a temperature of 130°C for 12 hours until a light yellow solid precursor is obtained. Grind the obtained light yellow solid precursor into a fine powder and put it into a porcelain boat. At a flow rate of 30mL / min nitrogen and argon mixed gas protection conditions, placed in a tube furnace for heating and roasting. The calcination process was heated from room temperature to 900 °C at a heating rate of 8 °C / min, then kept at ...

Embodiment 3

[0050] A method for preparing a nitrogen-doped carbon nanosheet material modified with bismuth nanoparticles with a porous surface and high specific surface area, specifically comprising the following steps:

[0051] With 5.0g of polyvinylpyrrolidone K25 as carbon source and nitrogen source, add 100mL of water to fully dissolve in the beaker, then add 10g of bismuth acetate in the beaker, stir and adjust the pH value of the mixed solution to 5.0 with nitrous nitric acid, at this time Bismuth nitrate is completely dissolved. Put the prepared solution in an electric blast drying oven at a temperature of 120°C for 13 hours until a light yellow solid precursor is obtained, grind the obtained light yellow solid precursor to a fine powder and put it into a porcelain boat, at a flow rate of 60mL / min nitrogen and argon mixed gas protection conditions, placed in a tube furnace for heating and roasting. The calcination process was heated from room temperature to 800 °C at a heating ra...

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Abstract

The invention belongs to the field of nanometer materials, and discloses a porous and high-specific-surface-area bismuth-nanoparticle-modified nitrogen-doped carbon nanosheet material and a preparation method and application thereof. The preparation method comprises the following steps that a polyvinylpyrrolidone solution is used as a nitrogen source and a carbon source, and is added into a beaker; bismuth salts are added into a nitrogen source solution and stirred, and the pH value is adjusted by using a weak acid solution to dissolve all the bismuth salts; the prepared solution is placed inan electrothermal blowing dry box to be dried to obtain a solid precursor; and the solid precursor is ground into fine powder and then placed into a porcelain boat, and is placed into a tube furnace to be heated and roasted under the condition of protecting the air environment to obtain the nanosheet material. According to the preparation method, synthesis and doping of carbon nanomaterials and modification of bismuth nanoparticles are combined into one, the obtained bismuth-nanoparticle-modified nitrogen-doped carbon nanosheet material is stable in structure and performance, and the good heavy metal detection performance is achieved; and the preparation method is simple and easy to operate, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of nanomaterials and relates to the technical field of nitrogen-doped carbon nanomaterials, in particular to a nitrogen-doped carbon nanosheet material modified by bismuth nanoparticles with a high specific surface area and a preparation method and application thereof. Background technique [0002] Carbon nanomaterials are the most common materials in nature and occupy a very important position in the field of energy and materials. Carbon nanomaterials have the characteristics of high electrical conductivity, high specific surface area, good chemical stability and convenient large-scale production. They have been widely used in energy storage, gas separation, heavy metal adsorption and detection and other fields. However, pure carbon materials have poor hydrophilic properties and low activity, which is not conducive to the deposition, dispersion and interaction of heavy metals on their surfaces, which limits their app...

Claims

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Application Information

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IPC IPC(8): B22F9/20B22F1/00C01B32/15B82Y40/00B82Y30/00G01N27/48G01N27/30
CPCG01N27/308G01N27/48B82Y30/00B82Y40/00B22F9/20B22F1/054
Inventor 黄奕莹鲁志伟叶建山
Owner GUANGZHOU INGSENS SENSOR TECH
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