Preparation method of electrochemical sensor for detecting dopamine
An electrochemical and sensor technology, applied in the field of electrochemical detection, can solve the problems of application limitation, high cost of Pt catalyst, poor stability, etc., and achieve the effects of fast detection, accelerated electron transfer rate, and good electrical performance
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Embodiment 1
[0029] The invention provides a method for preparing an electrochemical sensor for detecting dopamine, comprising:
[0030] Step 1. Use polishing powder with a particle size of 1.0 μm, 0.3 μm and 0.05 μm to polish the glassy carbon electrode on a polishing cloth, then rinse with ultrapure water, and then wash it in acetone, 0.5mol / L sulfuric acid and ultrapure water in sequence Sonicate for 3 minutes, wash with ultra-pure water after each sonication, and finally dry at room temperature; take 1ml of aminated reduced graphene oxide with a concentration of 0.5mg / ml, ultrasonicate for 5min, and pipette 5 μL of ultrasonically treated aminated reduced graphene oxide was added dropwise on the surface of the glassy carbon electrode, then placed in a GJ-1A infrared rapid drying oven for 20 minutes, then taken out, cooled to room temperature, and aminated Reduced graphene oxide modified glassy carbon electrode;
[0031] Step 2, put the aminated reduction graphene oxide modified glassy ...
Embodiment 2
[0058] The invention provides a method for preparing an electrochemical sensor for detecting dopamine, comprising:
[0059] Step 1. Use polishing powder with a particle size of 1.0 μm, 0.3 μm and 0.05 μm to polish the glassy carbon electrode on a polishing cloth, then rinse with ultrapure water, and then wash it in acetone, 0.5mol / L sulfuric acid and ultrapure water in sequence Sonicate for 3 minutes, wash with ultra-pure water after each sonication, and finally dry at room temperature; take 1ml of aminated reduced graphene oxide with a concentration of 0.5mg / ml, ultrasonicate for 5min, and pipette 5 μL of ultrasonically treated aminated reduced graphene oxide was added dropwise on the surface of the glassy carbon electrode, then placed in a GJ-1A infrared rapid drying oven for 20 minutes, then taken out, cooled to room temperature, and aminated Reduced graphene oxide modified glassy carbon electrode;
[0060] Step 2, put the aminated reduction graphene oxide modified glassy ...
Embodiment 3
[0063] The invention provides a method for preparing an electrochemical sensor for detecting dopamine, comprising:
[0064] Step 1. Use polishing powder with a particle size of 1.0 μm, 0.3 μm and 0.05 μm to polish the glassy carbon electrode on a polishing cloth, then rinse with ultrapure water, and then wash it in acetone, 0.5mol / L sulfuric acid and ultrapure water in sequence Sonicate for 3 minutes, wash with ultrapure water after each sonication, and then dry at room temperature; then use a pipette gun to drop 5 μL of cerium / silicon dioxide dispersion solution on the surface of the polished glassy carbon electrode, Then place it in a GJ-1A type infrared quick drying box and take it out after drying for 20 minutes, and cool to room temperature. The preparation method of the cerium / silicon dioxide dispersion is: 0.5gCe(NO3) 6H2O is dissolved in 100ml deionized Add 25g of nano silicon dioxide to the water, stir well, let it stand for 24h, then transfer to a vacuum drying oven,...
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