Method for preparing nano TiB2/carbon nano tube composite paste electrode sensor

A carbon nanotube composite and electrode sensor technology, applied in the field of electrochemical analysis, can solve the problems of expensive instruments and cumbersome operations, and achieve the effects of low cost, wide electrochemical window and small residual current

Inactive Publication Date: 2018-09-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The determination method of cefixime 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) Pretreatment of carbon nanotubes: In the reactor, add deionized water: 180mL, concentrated sulfuric acid: 370mL, ammonium persulfate: 40g, stir to dissolve, cool to room temperature, add carbon nanotubes: 100g, in Soak at room temperature for 11 hours, boil for 10 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 carbon nanotubes;

[0024] (2) Nano-TiB 2 / Preparation of carbon nanotube composite paste electrode: In an agate mortar, add nano-TiB 2 : 40g, pretreated carbon nanotubes: 25g, 1-propenyl-3-methylimidazolium tetrafluoroborate: 28g, glycerol: 6 mL, grind evenly to obtain nano-TiB 2 / carbon nanotubes / 1-propenyl-3-methylimidazolium tetrafluoroborate mixture carbon paste; then put the carbon paste into a glass tube with an inner diameter of Φ5mm connected with a wire, compact it, dry it, and use a metallographic Sand...

Embodiment 2

[0026] (1) Pretreatment of carbon nanotubes: In the reactor, add deionized water: 150mL, concentrated sulfuric acid: 380 mL, ammonium persulfate: 30g, stir and dissolve, cool to room temperature, add carbon nanotubes: 120g, in Soak at room temperature for 10 hours, boil for 10 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 carbon nanotubes;

[0027] (2) Nano-TiB 2 / Preparation of carbon nanotube composite paste electrode: In an agate mortar, add nano-TiB 2 : 38g, pretreated carbon nanotubes: 27g, 1-propenyl-3-methylimidazolium tetrafluoroborate: 25g, glycerol: 8 mL, grind evenly to obtain nano-TiB 2 / carbon nanotubes / 1-propenyl-3-methylimidazolium tetrafluoroborate mixture carbon paste; then put the carbon paste into a glass tube with an inner diameter of Φ5mm connected with a wire, compact it, dry it, and use a metallographic Sand...

Embodiment 3

[0029] (1) Pretreatment of carbon nanotubes: In the reactor, add deionized water: 160mL, concentrated sulfuric acid: 350mL, ammonium persulfate: 60g, stir to dissolve, cool to room temperature, add carbon nanotubes: 130g, in Soak at room temperature for 12 hours, boil for 10 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 carbon nanotubes;

[0030] (2) Nano-TiB 2 / Preparation of carbon nanotube composite paste electrode: In an agate mortar, add nano-TiB 2 : 38g, pretreated carbon nanotubes: 26g, 1-propenyl-3-methylimidazolium tetrafluoroborate: 30g, glycerol: 5mL, grind evenly to obtain nano-TiB 2 / carbon nanotubes / 1-propenyl-3-methylimidazolium tetrafluoroborate mixture carbon paste; then put the carbon paste into a glass tube with an inner diameter of Φ5mm connected with a wire, compact it, dry it, and use a metallographic Sanding...

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Abstract

The invention discloses a method for preparing a nano TiB2/carbon nano tube composite paste electrode sensor. The method is characterized by comprising the following steps: pre-treating carbon nano tubes with concentrated sulfuric acid and ammonium persulfate to obtain pretreated carbon nano tubes; respectively 38-42% of nano TiB2, 23-26% of pretreated carbon nano tubes, 25-30% of 1-allyl-3-methylimidazolium tetrafluoroborate and 6-10% of glycerin into an agate mortar, and uniformly grinding to obtain the mixture carbon paste; and filling the carbon paste into a glass tube which is connected with a wire and has an inner diameter of Phi 5 mm, compacting, drying, polishing by abrasive paper for metallograph, polishing, and washing with deionized water, thereby obtaining the nano TiB2/carbonnano tube composite paste electrode. Compared with that of an ordinary carbon paste electrode, the conductivity of the carbon paste electrode prepared in the invention is improved by 4-5 times, and the carbon paste electrode has the advantages of being wide in electrochemical window, simple in preparation method, low in cost, easy for surface renewal, low in residual current and the like. The cefixime detection sensitivity is high, and the selectivity is excellent.

Description

technical field [0001] The invention relates to a preparation method of an electrochemical sensor, in particular to a nano-TiB 2 Preparation method and application of carbon nanotube composite paste electrode sensor. It belongs to the field of electrochemical analysis. Background technique [0002] Titanium diboride (TiB 2 ) powder is gray or gray-black, with a hexagonal (AlB2) crystal structure. In the crystal structure, boron atomic planes and titanium atomic planes appear alternately to form a two-dimensional network structure, in which B is covalently bonded with the other three B, and the extra electron forms a large π bond. This graphite-like boron atomic layer structure and Ti outer electrons determine that TiB2 has good electrical conductivity and metallic luster, and the Ti-B bond between the boron atomic surface and the titanium atomic surface determines the high hardness of this material and brittle characteristics. It has a high melting point (3250°C), Vick...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/26
CPCG01N27/308G01N27/26
Inventor 李慧芝许崇娟卢燕
Owner UNIV OF JINAN
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