Preparation of nano-TiC/graphene composite paste electrode sensor

A graphene composite, electrode sensor technology, applied in the field of electrochemical analysis, can solve the problems of complicated operation and expensive instruments, and achieve the effects of wide electrochemical window, low cost and surface renewal

Inactive Publication Date: 2018-10-16
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The determination method of cefoxitin is mainly high-performance liquid chromatography, and the instrument used in this method is expensive, and the operation is loaded down with trivial details

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Graphene pretreatment: In the reactor, add deionized water: 120 mL, ammonium persulfate: 60 g, stir to dissolve, add concentrated sulfuric acid: 390 mL, cool to room temperature, add graphene: 100 g, in Soak at room temperature for 19 hours, boil for 40 minutes, cool to room temperature, separate solid and liquid, wash with deionized water without sulfate radicals, then wash with absolute ethanol, dry, grind to powder, and obtain pretreated graphene;

[0024] (2) Preparation of nano-TiC / graphene composite paste electrode sensor: In an agate mortar, add nano-TiC: 44g, pre-treated graphene: 23g, N-ethyl-3-methylpyridine tetrafluoroboric acid Salt: 22g, silicone oil: 12 mL, grind evenly to get carbon paste of nano-TiC / graphene / N-ethyl-3-methylpyridinium tetrafluoroborate mixture; then put the carbon paste into a wire-connected In a glass tube with an inner diameter of Φ5mm, compact, dry, grind with metallographic sandpaper, polish, and wash with deionized water to obta...

Embodiment 2

[0026] (1) Graphene pretreatment: In the reactor, add deionized water: 150 mL, ammonium persulfate: 40 g, stir to dissolve, add concentrated sulfuric acid: 410 mL, cool to room temperature, add graphene: 60 g, in Soak at room temperature for 18 hours, boil for 40 minutes, cool to room temperature, separate solid and liquid, wash with deionized water without sulfate radicals, then wash with absolute ethanol, dry, and grind to powder to obtain pretreated graphene;

[0027] (2) Preparation of nano-TiC / graphene composite paste electrode sensor: In an agate mortar, add nano-TiC: 42g, pre-treated graphene: 21g, N-ethyl-3-methylpyridine tetrafluoroboric acid Salt: 25g, silicone oil: 13 mL, grind evenly to get carbon paste of nano-TiC / graphene / N-ethyl-3-methylpyridine tetrafluoroborate mixture; then put the carbon paste into a wire-connected In a glass tube with an inner diameter of Φ5mm, compact, dry, grind with metallographic sandpaper, polish, and wash with deionized water to obtai...

Embodiment 3

[0029] (1) Graphene pretreatment: In the reactor, add deionized water: 100 mL, ammonium persulfate: 80 g, stir to dissolve, add concentrated sulfuric acid: 400 mL, cool to room temperature, add graphene: 80 g, in Soak at room temperature for 20 hours, boil for 40 minutes, cool to room temperature, separate solid and liquid, wash with deionized water without sulfate radicals, then wash with absolute ethanol, dry, and grind to powder to obtain pretreated graphene;

[0030](2) Preparation of nano-TiC / graphene composite paste electrode sensor: In an agate mortar, add nano-TiC: 46g, pre-treated graphene: 25g, N-ethyl-3-methylpyridine tetrafluoroboric acid Salt: 20g, silicone oil: 9.5 mL, grind evenly to get carbon paste of nano-TiC / graphene / N-ethyl-3-picoline tetrafluoroborate mixture; then put the carbon paste into a wire-connected In a glass tube with an inner diameter of Φ5mm, compact, dry, grind with metallographic sandpaper, polish, and wash with deionized water to obtain a na...

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Abstract

The invention discloses a preparation method of a nano-TiC/graphene composite paste electrode sensor. The preparation method of the nano-TiC/graphene composite paste electrode sensor is characterizedby comprising the following steps: treating graphene by using concentrated sulfuric acid and ammonium persulfate to obtain pretreated graphene; then adding 42 to 46% of nano-TiC, 21 to 25% of pretreated graphene, 20 to 25% of N-ethyl-3-methylpyridine tetrafluoroborate and 8 to 12% of silicone oil respectively in an agate mortar, and uniformly grinding to obtain a mixture of carbon paste; placing the carbon paste of the mixture in a glass tube connected with a wire and of which the inner diameter is Phi 5mm, performing compaction, drying, sanding with metallographic sandpaper, polishing, and washing with deionized water, thereby obtaining the nano-TiC/graphene composite paste electrode sensor. The carbon paste electrode prepared by the application has the advantages of having 4 to 5 times higher conductivity than that of the ordinary carbon paste electrode, wide electrochemical window, simple preparation method, low cost, easy surface renewal, small residual current and the like, and isfurther high in detection sensitivity of cefoxitin and good in selectivity.

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 nano-TiC / graphene composite paste electrode sensor. It belongs to the field of electrochemical analysis. Background technique [0002] Titanium carbide (TiC) is an iron-gray crystal with metallic luster, which belongs to the NaCl type simple cubic structure, and the lattice constant is 0.4329 nm. The carbon atom and the titanium atom are equivalent in the lattice position, and there is a strong bond between TiC atoms. Covalently bonded, it has some properties similar to metals, such as high melting point, boiling point and hardness, the hardness is second only to diamond, and it has good thermal and electrical conductivity (3.0×10 7 S / cm), and even exhibit superconductivity at extremely low temperatures. It is insoluble in water and has high chemical stability. It has almost no chemical reaction with hydrochloric acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/26
CPCG01N27/26G01N27/308
Inventor 李慧芝翟玉博朱学英
Owner UNIV OF JINAN
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