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Fabrication method of bismuth-doped nanometer SiC/carbon nanotube paste electrode sensor

An electrode sensor and carbon nanotube technology, applied in the field of electrochemical analysis, can solve problems such as poor stability, poor electrical conductivity, and low sensitivity, and achieve the effects of low cost, easy surface, and improved sensitivity

Inactive Publication Date: 2019-10-01
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, carbon paste electrodes also have some disadvantages, such as poor conductivity, low sensitivity, poor stability, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Bismuth-doped carbon-containing quantum dot adhesive: In the reaction kettle, add 1-butyl-3-methylimidazolium chloride salt: 83g, bismuth citrate: 5g, cellulose: 12g, and stir well , sealed, placed in an oven at 120±2°C, reacted at a constant temperature for 9 hours, cooled to room temperature, and the light yellow viscous liquid was bismuth-doped carbon-containing quantum dot adhesive;

[0026] (2) Preparation of nano-SiC / carbon nanotubes / bismuth-doped carbon quantum dot mixture carbon paste: In an agate mortar, add nano-SiC: 46g, oxidized carbon nanotubes: 27g, bismuth-doped carbon quantum dot glue Adhesive: 12g, polyethylene glycol: 5g, ethanol: 13mL, and grind evenly to get nano-SiC / carbon nanotube / bismuth-doped carbon quantum dot mixture carbon paste;

[0027] (3) Preparation of bismuth-doped nano-SiC / carbon nanotube paste electrode sensor: put the carbon paste mixture in step (2) into a glass tube with an inner diameter of Φ5mm connected to a wire, remove the ...

Embodiment 3

[0033] (1) Bismuth-doped carbon-containing quantum dot adhesive: In the reaction kettle, add 1-butyl-3-methylimidazolium chloride salt: 82g, bismuth citrate: 4g, cellulose: 14g, stir well , sealed, placed in an oven at 120±2°C, reacted at a constant temperature for 10 hours, cooled to room temperature, and the light yellow viscous liquid was bismuth-doped carbon-containing quantum dot adhesive;

[0034](2) Preparation of nano-SiC / carbon nanotubes / bismuth-doped carbon quantum dot mixture carbon paste: In an agate mortar, add nano-SiC: 45g, oxidized carbon nanotubes: 28g, bismuth-doped carbon quantum dot glue Adhesive: 14g, polyethylene glycol: 4g, ethanol: 11mL, grind evenly to get nano-SiC / carbon nanotube / bismuth-doped carbon quantum dot mixture carbon paste;

[0035] (3) Preparation of bismuth-doped nano-SiC / carbon nanotube paste electrode sensor: put the carbon paste mixture in step (2) into a glass tube with an inner diameter of Φ5mm connected to a wire, remove the gas, com...

Embodiment 4

[0037] (1) Bismuth-doped carbon-containing quantum dot adhesive: In the reaction kettle, add 1-butyl-3-methylimidazolium chloride salt: 85g, bismuth citrate: 4g, cellulose: 11g, and stir well , sealed, placed in an oven at 120±2°C, reacted at a constant temperature for 8.5 hours, cooled to room temperature, and the light yellow viscous liquid was bismuth-doped carbon-containing quantum dot adhesive;

[0038] (2) Preparation of nano-SiC / carbon nanotubes / bismuth-doped carbon quantum dot mixture carbon paste: In an agate mortar, add nano-SiC: 47g, oxidized carbon nanotubes: 26g, bismuth-doped carbon quantum dot glue Adhesive: 11g, polyethylene glycol: 4g, ethanol: 15mL, grind evenly, and get nano-SiC / carbon nanotube / bismuth-doped carbon quantum dot mixture carbon paste;

[0039] (3) Preparation of bismuth-doped nano-SiC / carbon nanotube paste electrode sensor: put the carbon paste mixture in step (2) into a glass tube with an inner diameter of Φ5mm connected to a wire, remove the ...

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Abstract

The invention discloses a fabrication method of a bismuth-doped nanometer SiC / carbon nanotube paste electrode sensor. The fabrication method is characterized by comprising the steps of dissolving bismuth citrate and cellulose by employing 1-butyl-3-methylimidazole chlorine salt to prepare faint yellow viscous liquid being a bismuth-doped carbon quantum dot-containing adhesive; uniformly grinding 45-48wt% of nanometer SiC, 25-28wt% of carbon oxide nanotube, 10-14wt% of bismuth-doped carbon quantum dot-containing adhesive, 4-6wt% of polyethylene glycol and 8-12wt% of ethyl alcohol in an agate mortar, thereby obtaining nanometer SiC / carbon nanotube / bismuth-doped carbon quantum dot mixture carbon paste; and loading the mixture carbon paste in a glass tube connected with a wire having inner radius being 5 millimeters, thereby obtaining the bismuth-doped nanometer SiC / carbon nanotube paste electrode sensor. Conductivity of the electrode fabricated by the method is improved by 4-6 times compared with a conventional carbon paste electrode, the electrode has the advantages of wide electrochemical window, simple fabrication method, small residual current, high detection sensitivity and goodselectivity and the like, and a surface is easy to update.

Description

technical field [0001] The invention relates to a preparation method of an electrochemical sensor, in particular to a preparation method and application of a bismuth-doped nano-SiC / carbon nanotube paste electrode sensor. It belongs to the field of electrochemical analysis. Background technique [0002] Si-C in silicon carbide is covalently bonded through sp3 hybridization, and the Si-C bond energy is very strong, which makes SiC have many excellent properties, such as wear resistance, high mechanical strength, high hardness, stable chemical properties, corrosion resistance, and thermal stability. High temperature resistance, low background current, low interference, excellent semiconductor material, so silicon carbide has great application value, widely used in many fields such as optics, electricity, machinery, etc., it is an ideal carrier material. Since carbon atoms in carbon nanotubes (CNTs) adopt SP 2 hybridized, compared to SP 3 Hybridization, SP 2 The S orbital co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/327
CPCG01N27/308G01N27/3278
Inventor 李慧芝翟玉博朱学英
Owner UNIV OF JINAN
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