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Preparation method of nano NbN/graphite composite paste electrode sensor

An electrode sensor and nano-graphite powder technology, applied in the field of electrochemical analysis, can solve the problems of poor stability, low sensitivity, poor electrical conductivity, etc., and achieve the effects of low cost, improved sensitivity, and easy surface

Inactive Publication Date: 2019-11-12
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

[0026] (1) Nano graphite powder pretreatment: In the reactor, add deionized water: 55 mL, slowly add concentrated sulfuric acid: 18 mL, stir evenly, cool to room temperature, potassium periodate: 6 g, stir to dissolve, add nano Graphite powder: 7g, soaked at room temperature for 19 hours, boiled for 20 minutes, cooled to room temperature, separated from solid and liquid, washed with deionized water until neutral, dried, and ground to obtain pretreated nano-graphite powder;

[0027] (2) Preparation of composite adhesive: In the reaction kettle, add 1-vinyl-3-butylimidazole trifluoromethanesulfonate: 74g, pretreated loofah powder: 26g, cover the sealing cap, and place In an incubator, keep the temperature at 160±2°C and react for 16 hours to obtain a viscous light yellow transparent liquid, which is a composite adhesive;

[0028] (3) Preparation of nano-NbN / graphite composite paste electrode sensor: In an agate mortar, add nano-niobium nitride: 44g, pre-treated nano-graphite pow...

Embodiment 2

[0030] (1) Nano-graphite powder pretreatment: In the reactor, add deionized water: 57mL, slowly add concentrated sulfuric acid: 17mL, stir well, cool to room temperature, potassium periodate: 7g, stir to dissolve, add nano-graphite Powder: 6g, soaked at room temperature for 18 hours, boiled for 20 minutes, cooled to room temperature, separated from solid and liquid, washed with deionized water until neutral, dried, and ground to obtain pretreated nano-graphite powder;

[0031] (2) Preparation of composite adhesive: In the reaction kettle, add 1-vinyl-3-butylimidazole trifluoromethanesulfonate: 72g, pretreated loofah powder: 28g, cover the sealing cap, and place In an incubator, keep the temperature at 160±2°C and react for 17 hours to obtain a viscous light yellow transparent liquid, which is a composite adhesive;

[0032](3) Preparation of nano-NbN / graphite composite paste electrode sensor: In an agate mortar, add nano-niobium nitride: 42g, pre-treated nano-graphite powder: 2...

Embodiment 3

[0034] (1) Nano-graphite powder pretreatment: In the reactor, add deionized water: 54 mL, slowly add concentrated sulfuric acid: 17.5 mL, stir well, cool to room temperature, potassium periodate: 5 g, stir to dissolve, add Nano-graphite powder: 10g, soaked at room temperature for 20 hours, boiled for 20 minutes, cooled to room temperature, separated from solid and liquid, washed with deionized water until neutral, dried, and ground to obtain pretreated nano-graphite powder;

[0035] (2) Preparation of composite adhesive: In the reaction kettle, add 1-vinyl-3-butylimidazole trifluoromethanesulfonate: 76g, pretreated loofah powder: 24g, cover the sealing cap, and place In an incubator, keep the temperature at 160±2°C, react for 15 hours, and obtain a viscous light yellow transparent liquid, which is a composite adhesive;

[0036] (3) Preparation of nano-NbN / graphite composite paste electrode sensor: In an agate mortar, add nano-niobium nitride: 46g, pre-treated nano-graphite pow...

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Abstract

The invention discloses a preparation method of a nano NbN / graphite composite paste electrode sensor. The preparation method is characterized by comprising the following steps: carrying out pretreatment on nano graphite powder by adopting sulfuric acid and potassium periodate to obtain pretreated nano graphite powder; adopting 1-vinyl-3-butyl imidazolium trifluoromethanesulfonate for dissolving loofah sponge to prepare a composite adhesive; and then, in an agate mortar, adding, in percentage by mass, 42-46% of nano niobium nitride, 22-26% of the pretreated nano graphite powder, 14-18% of the composite adhesive and 16-20% of liquid paraffin, uniformly grinding the components to form carbon paste, and then putting the carbon paste into a glass tube with the inner diameter of phi 6 mm, connected with a lead wire, so as to obtain the nano NbN / graphite composite paste electrode sensor. Compared with a common carbon paste electrode, a prepared carbon paste electrode has the advantages that the conductivity can be improved by 6-8 times, an electrochemical window is wide, the preparation method is simple, the cost is low, the surface is easy to update, the residual current is small, and the like. The astaxanthin detection sensitivity is high and the selectivity is high.

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 nanometer NbN / graphite composite paste electrode sensor. It belongs to the field of electrochemical analysis. Background technique [0002] Nitride is a binary compound of nitrogen and an element with a lower electronegativity than it. The nitrides formed by the direct combination of transition elements and nitrogen are also called metal nitrides. They are "messenchymal compounds", named for the nitrogen atoms that occupy the interstitial positions in the metal lattice. This compound is metal-like in appearance, hardness and conductivity, and generally has high hardness, high melting point, stable chemical properties and conductivity. Niobium nitride (NbN) is a typical B-1 type compound. Sodium chloride crystal structure. High thermal stability and chemical stability, anti-neutron radiation, excellent superconducti...

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 李慧芝翟玉博张诺
Owner UNIV OF JINAN
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