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Method for preparing electrochemical transducer for detecting carbamic acid ester

A carbamate and electrochemical technology is applied in the field of preparation of electrochemical sensors, which can solve the problems of cumbersome process and low yield, and achieve the effects of simple preparation, low cost, and increased electron transfer capability.

Inactive Publication Date: 2016-12-07
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, most of the synthesis methods are synthesized separately, and then compound the catalyst and the carrier, the process is cumbersome and the yield is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 Co-TiO 2 / MoS 2 preparation of

[0039] (1) Add 0.6 g of molybdenum disulfide powder and 0.2 mmol of cobalt salt to 3 mL of n-butyllithium solution, and stir for 12 hours under nitrogen protection at 60 °C to obtain the reacted solution;

[0040] (2) Wash the reacted solution in step (1) with a non-polar solvent, and then perform ultrasonic treatment in a water bath at 60 °C. After the treatment, wash the treated solution with a non-polar solvent, and dry it in vacuum to obtain cobalt Intercalated molybdenum disulfide nanomaterials;

[0041] (3) Add 500 mg of cobalt-intercalated molybdenum disulfide nanomaterials prepared in step (2) into 5 mL of tetrabutyl titanate, stir for 1 hour, slowly add 0.5 mL of hydrofluoric acid while stirring, and then Reaction in the reactor at 160°C for 18 hours;

[0042] (4) The reaction product obtained in step (3) was centrifuged and washed three times with ultrapure water and absolute ethanol, and then vacuum-dried at 50 °...

Embodiment 2

[0047] Example 2 Co-TiO 2 / MoS 2 preparation of

[0048] (1) Add 0.6 g of molybdenum disulfide powder and 1.0 mmol of cobalt salt into 5 mL of n-butyllithium solution, and stir for 24 hours under nitrogen protection at 30 °C to obtain the reacted solution;

[0049] (2) Wash the reacted solution in step (1) with a non-polar solvent, and then perform ultrasonic treatment in a water bath at 30 °C. After the treatment, wash the treated solution with a non-polar solvent, and dry it in vacuum to obtain cobalt Intercalated molybdenum disulfide nanomaterials;

[0050] (3) Add 200 mg of cobalt-intercalated molybdenum disulfide nanomaterials prepared in step (2) into 5 mL of tetrabutyl titanate, stir for 1 hour, then slowly add 0.6 mL of hydrofluoric acid while stirring, and then Reaction in the reactor at 180°C for 20 hours;

[0051] (4) The reaction product obtained in step (3) was centrifuged and washed three times with ultrapure water and absolute ethanol, and then vacuum-dried ...

Embodiment 3

[0056] Example 3 Co-TiO 2 / MoS 2 preparation of

[0057] (1) Add 0.6 g of molybdenum disulfide powder and 2.0 mmol of cobalt salt to 10 mL of n-butyllithium solution, and stir for 48 hours under nitrogen protection at 50 °C to obtain the reacted solution;

[0058] (2) Wash the reacted solution in step (1) with a non-polar solvent, and then perform ultrasonic treatment in a water bath at 50 °C. After the treatment, wash the treated solution with a non-polar solvent, and dry it in vacuum to obtain cobalt Intercalated molybdenum disulfide nanomaterials;

[0059] (3) Take 10 mg of cobalt-intercalated molybdenum disulfide nanomaterials prepared in step (2) and add them to 5 mL of tetrabutyl titanate. After stirring for 1 hour, slowly add 0.8 mL of hydrofluoric acid while stirring, and then Reaction in the reactor at 200°C for 24 hours;

[0060] (4) The reaction product obtained in step (3) was centrifuged and washed three times with ultrapure water and absolute ethanol, and the...

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Abstract

The invention discloses a method for preparing an electrochemical transducer for detecting carbamic acid ester, and belongs to the technical field of novel nano functional materials and biosensors. The method comprises the steps that firstly, a novel two-dimensional nano electrode material, a titanium dioxide / molybdenum disulfide doped composite Co-TiO2 / MoS2, namely, a cobalt doped titanium dioxide nano square in-situ synthesis molybdenum disulfide two-dimensional nanocomposite is prepared, the good biocompatibility and large specific surface area of the material are utilized, and carbamate antibodies are loaded. When detection is carried out, due to the fact that cobalt doped titanium dioxide can catalyze hydrogen peroxide to be reduced to generate O2 in situ, electrochemical signals are generated, the specificity of the antibodies and antigens is quantitatively combined with the influence on the electronic transmission capacity, the current intensity is correspondingly reduced, and finally the biosensor for detecting carbamic acid ester through a mark-free electrochemical method is constructed.

Description

technical field [0001] The invention relates to a preparation method of an electrochemical sensor which can be used for detecting carbamate. It belongs to the technical field of new nanometer functional materials and biosensors. Background technique [0002] Carbamate is a compound in which the amino group or amine group is directly linked to the carbonyl of the formate ester, and is used as a pesticide, herbicide, fungicide, etc. Carbamate pesticides are the main cause of acute pesticide poisoning, and they are also the key detection varieties of pesticide residues in vegetables nowadays, because the specific poisoning symptoms of carbamate pesticides begin to appear after 3 hours of continuous work, and the initial poisoning symptoms are those who are poisoned. Feeling unwell and possibly vomiting, nausea, headache and dizziness, fatigue and chest tightness; later the patient begins to sweat profusely and salivate (drool), blurred vision, spontaneous muscle contractions, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/327
CPCG01N27/327
Inventor 张勇魏琴胡丽华王耀光孙旭
Owner UNIV OF JINAN
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