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Preparation method and application of electrochemical chlordimeform sensor based on composite cerium-doped porous nanocomposite

A nano-composite material and insecticidal amidine technology, which is applied in the fields of material electrochemical variables, scientific instruments, analytical materials, etc., can solve the problems of low sensitivity, poor conductivity, and unfavorable practical application of electrochemical sensors, and improve the electron transfer ability. , the effect of improving strength and stability, and increasing the ability of electron transfer

Inactive Publication Date: 2016-05-11
王亚莉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor conductivity of titanium dioxide also limits the sensitivity of electrochemical sensors constructed from a single titanium dioxide nanomaterial, which is not conducive to practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1Ce-MoO 3 / TiO 2 g-C 3 N 4 preparation of

[0030] First, add 0.6mmol sodium molybdate and 0.8mmol cerium salt into 5mL tetrabutyl titanate, slowly add 0.5mL hydrofluoric acid during stirring, react in the reactor at 160°C for 24 hours, and cool to room temperature , after centrifuging and washing three times with ultrapure water and absolute ethanol, vacuum-dry at 50°C; secondly, take 150 mg of the dried solid and mix it with 400 mg of melamine, and grind it into powder; then, put the ground powder into a muffle furnace , the heating rate is 1°C / min, and it is calcined at 480°C for 5 hours; finally, the calcined powder is cooled to room temperature to obtain Ce-MoO 3 / TiO 2 g-C 3 N 4 ;

[0031] The cerium salt is cerium sulfate.

Embodiment 2

[0032] Example 2Ce-MoO 3 / TiO 2 g-C 3 N 4 preparation of

[0033] First, add 0.8mmol sodium molybdate and 1.0mmol cerium salt into 5mL tetrabutyl titanate, slowly add 0.65mL hydrofluoric acid during stirring, react in the reactor at 180°C for 21 hours, and cool to room temperature , washed with ultrapure water and absolute ethanol for three times, then vacuum-dried at 50°C; secondly, take 200mg of the dried solid and mix it with 400mg of melamine, and grind it into powder; then, put the ground powder into a muffle furnace , the heating rate is 2°C / min, and calcined at 520°C for 2 hours; finally, the calcined powder is cooled to room temperature to obtain Ce-MoO 3 / TiO 2 g-C 3 N 4 ;

[0034] The cerium salt is cerium chloride.

Embodiment 3

[0035] Example 3Ce-MoO 3 / TiO 2 g-C 3 N 4 preparation of

[0036] First, add 1.0mmol sodium molybdate and 1.2mmol cerium salt into 5mL tetrabutyl titanate, slowly add 0.8mL hydrofluoric acid during stirring, react in the reactor at 200°C for 18 hours, and cool to room temperature , after centrifuging and washing with ultrapure water and absolute ethanol three times, vacuum drying at 50°C; secondly, take 250 mg of the dried solid and mix it with 400 mg of melamine, and grind it into powder; then, put the ground powder into a muffle furnace , the heating rate was 3°C / min, and calcined at 560°C for 0.5 hours; finally, the calcined powder was cooled to room temperature to obtain Ce-MoO 3 / TiO 2 g-C 3 N 4 ;

[0037] The cerium salt is cerium nitrate.

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Abstract

The invention discloses a preparation method of an electrochemical chlordimeform sensor based on a composite cerium-doped porous nanocomposite, and belongs to the technical field of novel nano functional materials and biosensors. The method comprises the steps that the novel two-dimensional nanocomposite Ce-MoO3 / TiO2@g-C3N4 is prepared firstly, and by means of the good biocompatibility and large specific surface area of the material, the material is loaded with a chlordimeform antibody; horse radish peroxidase is fixed by means of the crosslinking action of glutaraldehyde; when detection is conducted, the horse radish peroxidase can catalyze hydrogen peroxide to generate an electrochemical signal, and by means of the influence of specific quantitative combination of the antibody and an antigen on electron transmission capability, the current intensity is correspondingly decreased, and the electrochemical biosensor which is low in cost, high in sensitivity, good in specificity, rapid in detection and easy to prepare is finally prepared for detecting chlordimeform.

Description

technical field [0001] The invention relates to a preparation method of an electrochemical dimeform sensor. It belongs to the technical field of new nanometer functional materials and biosensors. Background technique [0002] Dimeform is a kind of pesticide. In the soil, dimeform can migrate slightly to the deep layer of the soil through the leaching of water. Animals with chronic poisoning of dimeform may experience weight loss, hematocrit, hemoglobin and red blood cell count decrease, white blood cell count increase, etc. According to a 1972 WHO report, long-term exposure to chlordimeform can lead to cancer. At present, the methods for detecting dimeform mainly include chromatography and mass spectrometry. Such methods require expensive instruments and complex operations, and laboratory personnel need professional training before they can perform detection. Therefore, it is of great significance to develop a chlordimeform sensor with low cost, fast detection, high sensi...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/327
CPCG01N27/26G01N27/327
Inventor 王亚莉
Owner 王亚莉
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