Preparation method of nanoparticle-modified glassy carbon electrode and application thereof
A glassy carbon electrode and nanoparticle technology, applied in the field of electrochemical analysis, can solve the problems of complex riboflavin process, wide linear range, long time consumption, etc., and achieve the effects of improving catalytic effect, wide linear range and simple equipment
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Embodiment 1
[0030] (1) Glassy carbon electrode pretreatment: place the glassy carbon electrode in turn on a polishing cloth containing polishing powder with a particle size of 1 μm, 0.3 μm, and 0.05 μm to polish to a mirror surface, and then place the glassy carbon electrode in acetone, Sulfuric acid solution with a concentration of 0.5 mol / L and ultrapure water were sonicated for 1 minute respectively, and rinsed with ultrapure water for 1 minute after each sonication to obtain a pretreated glassy carbon electrode;
[0031] (2) Preparation of platinum nanoparticles modified glassy carbon electrode: the pretreated glassy carbon electrode was placed in the 2 PtCl 6 (100mM) solution, the electrodeposition of platinum nanoparticles was carried out by cyclic voltammetry under the potential scanning range of -0.8V-0V. After the deposition was completed, it was rinsed with ethanol and deionized water, and dried under an infrared lamp to obtain platinum nanoparticles. Glassy carbon electrode; ...
Embodiment 2
[0036] (1) Glassy carbon electrode pretreatment: place the glassy carbon electrode in turn on a polishing cloth containing polishing powder with a particle size of 1 μm, 0.3 μm, and 0.05 μm to polish to a mirror surface, and then place the glassy carbon electrode in acetone, Sulfuric acid solution with a concentration of 0.5 mol / L and ultrapure water were sonicated for 1 minute respectively, and rinsed with ultrapure water for 1 minute after each sonication to obtain a pretreated glassy carbon electrode;
[0037] (2) Preparation of platinum nanoparticles modified glassy carbon electrode: the pretreated glassy carbon electrode was placed in the 2 PtCl 6 (100mM) solution, the electrodeposition of platinum nanoparticles was carried out by cyclic voltammetry under the potential scanning range of -0.8V-0V. After the deposition was completed, it was rinsed with ethanol and deionized water, and dried under an infrared lamp to obtain platinum nanoparticles. Glassy carbon electrode; ...
Embodiment 3
[0042] PBS buffer solution (pH=4.0) was used to prepare concentrations of 1.0×10 -7 mol / L, 1.0×10 -6 mol / L, 2.0×10 -6 mol / L, 5.0×10 -6 mol / L, 8.0×10 -6 mol / L, 1.0×10 -5 The riboflavin aqueous solution of mol / L; The polythiophene / MoS that embodiment 2 prepares 2 The nanomaterial / platinum nanoparticle modified glassy carbon electrode is used as the working electrode, the platinum electrode is used as the counter electrode, and Ag / AgCl is used as the reference electrode to form a three-electrode system. The three-electrode system is placed in riboflavin aqueous solution;
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