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Preparation of nano silver/carbon nano tube-modified electrode naringin molecular imprinting sensor

A carbon nanotube and molecular imprinting technology, applied in nanotechnology, nanotechnology, nanotechnology for sensing, etc., can solve the problems of high detection limit, difficult to control the thickness of the imprinted film, affecting the application of molecular imprinting technology, etc. High affinity and selectivity, response-enhancing effect

Inactive Publication Date: 2017-09-26
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thickness of the imprinted film prepared by the traditional imprinting method is difficult to control, and the high degree of cross-linking makes the electron transfer speed and response slow, and the lower limit of detection is high, which affects the application of molecular imprinting technology in electrochemical sensors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of nano-silver / carbon nanotube modification solution: In the reactor, add deionized water: 8 mL, silver nitrate: 0.3 g, carbon nanotube oxide: 0.6 g, ultrasonically for 20 minutes at room temperature, and disperse evenly. 20% hydrazine hydrate: 1.1 mL, stirred and reacted for 20 minutes, left overnight to obtain nano-silver / carbon nanotube modification solution;

[0024] (2) Preparation of nano-silver / carbon nanotube modified electrode: Polish the glassy carbon electrode with 0.2 μm and 0.01 μm polishing powder in turn, then ultrasonically clean it with twice-distilled water, wash with ethanol, and dry it, and place it on the surface of the glassy carbon electrode. Add 16 μL of nano-gold graphene modification solution dropwise, place it under an infrared lamp, and evaporate the solvent to obtain a nano-silver / carbon nanotube modified electrode;

[0025] (3) Preparation of naringin molecularly imprinted polymer: In the reactor, add ethanol: 72 mL, dipenta...

Embodiment 2

[0028] (1) Preparation of nano-silver / carbon nanotube modification solution: In the reactor, add deionized water: 7.8 mL, silver nitrate: 0.2 g, carbon nanotube oxide: 0.5 g, and ultrasonically disperse for 20 minutes at room temperature. 20% hydrazine hydrate: 1.5 mL, stirred and reacted for 20 minutes, left overnight to obtain nano-silver / carbon nanotube modification solution;

[0029] (2) Preparation of nano-silver / carbon nanotube modified electrode: Polish the glassy carbon electrode with 0.2 μm and 0.01 μm polishing powder in turn, then ultrasonically clean it with twice-distilled water, wash with ethanol, and dry it, and place it on the surface of the glassy carbon electrode. Add 17 μL of nano-gold graphene modification solution dropwise, place it under an infrared lamp, and evaporate the solvent to obtain a nano-silver / carbon nanotube modified electrode;

[0030](3) Preparation of naringin molecularly imprinted polymer: In the reactor, add ethanol: 6.6mL, dipentaerythri...

Embodiment 3

[0033] (1) Preparation of nano-silver / carbon nanotube modification solution: In the reactor, add deionized water: 8.4mL, silver nitrate: 0.3g, carbon nanotube oxide: 0.3g, ultrasonically 20min at room temperature, and disperse evenly. 20% hydrazine hydrate: 1.0 mL, stirred and reacted for 20 minutes, left overnight to obtain nano-silver / carbon nanotube modification solution;

[0034] (2) Preparation of nano-silver / carbon nanotube modified electrode: Polish the glassy carbon electrode with 0.2 μm and 0.01 μm polishing powder in turn, then ultrasonically clean it with twice-distilled water, wash with ethanol, and dry it, and place it on the surface of the glassy carbon electrode. Add 15 μL of nano-gold graphene modification solution dropwise, place it under an infrared lamp, and evaporate the solvent to obtain a nano-silver / carbon nanotube modified electrode;

[0035] (3) Preparation of naringin molecularly imprinted polymer: In the reactor, add ethanol: 7.8mL, dipentaerythritol...

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Abstract

The invention discloses preparation of a nano silver / carbon nano tube-modified electrode naringin molecular imprinting sensor. The preparation comprises the following steps: firstly preparing a nano silver / carbon nano tube-modified electrode by adopting a nano silver / carbon nano tube-modified glassy carbon electrode; then respectively adding 52-62 percent by weight of ethanol, 8-15 percent by weight of pentaerythritol triacrylate, 5-10 percent by weight of itaconic acid, 10-18 percent by weight of 1-propenyl-3-ethylimidazolium, 1.0-3.0 percent by weight of azodiisobutyronitrile and 4.0-10 percent by weight of naringin into a reactor, stirring at a temperature of 60+ / -2 DEG C under anaerobic atmosphere for reaction for 18-24 hours and removing template molecules by adopting a methanol and acetic acid mixed solution to obtain a naringin molecular imprinting polymer; dispensing the naringin molecular imprinting polymer onto the nano silver / carbon nano tube-modified electrode to obtain the naringin molecular imprinting sensor. The sensor is high in affinity and selectivity, high in sensitivity, good in specificity, quick in detection and capable of being reused.

Description

technical field [0001] The present invention relates to a preparation method of a molecularly imprinted sensor and the technical field of rapid detection application, in particular to a preparation method of a nano-silver / carbon nanotube modified electrode naringin molecularly imprinted sensor, which is used to detect drugs, food, biological Naringin in the samples. Background technique [0002] Naringin (alias: naringin, citrusin, isohesperidin), its molecular formula is C 27 h 32 o 14 , the relative molecular weight is 580.53, white to light yellow crystalline powder, soluble in methanol, ethanol, acetone, acetic acid, dilute alkali solution and hot water, the solubility in water is 0.1% at room temperature, and can reach 10% at 75°C . Insoluble in non-polar solvents such as petroleum ether, ether, benzene and chloroform. Naringin is a flavonoid compound. Since there is no conjugation between ring A and ring B, there is a strong ultraviolet absorption peak at 282nm, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/30B82Y15/00B82Y30/00
CPCB82Y15/00B82Y30/00G01N27/26G01N27/308
Inventor 李慧芝翟玉博陈艳晶
Owner UNIV OF JINAN
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