Electrochemical sensor and preparation and application thereof

An electrochemical and sensor technology, applied in the field of electrochemical sensors and their preparation, can solve the problems of carcinogenicity, teratogenicity, mutagenicity, increased risk of adenoma and hepatocellular carcinoma, and poor shape of electrochemical reduction peaks. Fast stability, good electrochemical redox reversibility, and the effect of overcoming the poor shape of the reduction peak

Active Publication Date: 2019-09-06
SOUTH CHINA NORMAL UNIVERSITY
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Problems solved by technology

Trichloroacetic acid will not only affect the environment, but also cause serious harm to human health. The harm of trichloroacetic acid to the human body mainly includes its carcinogenicity, teratogenicity and mutagenicity, which can induce liver peroxidase body proliferation, increased risk of adenoma and hepatocellular carcinoma
During the research process, it was found that silver nanopar

Method used

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  • Electrochemical sensor and preparation and application thereof
  • Electrochemical sensor and preparation and application thereof
  • Electrochemical sensor and preparation and application thereof

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Embodiment 1

[0041] see figure 1 , which is a flow chart of the preparation of the working electrode in the electrochemical sensor of the present invention. Wherein, the working electrode obtains a silver nanoparticle / polythionine / three-dimensional porous carbon ternary composite material by sequentially compounding three-dimensional porous carbon, polythionine and silver nanoparticles outside the base electrode, constituting the electrochemical sensor of the present invention, Specifically, it includes the following four steps:

[0042] S1. Preparation of base electrode:

[0043] A glassy carbon electrode is selected as the main body of the base electrode, the diameter of the glassy carbon electrode is 2 mm, and a polished fluff pad and 0.05 μm Al 2 o 3 The polishing powder is used to polish the glassy carbon electrode. After the polishing treatment, ultrapure water is used for rinsing, and ethanol and deionized water are used for ultrasonic cleaning treatment in sequence. The process...

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Abstract

The invention provides an electrochemical sensor comprising a working electrode, an auxiliary electrode and a reference electrode, wherein the working electrode comprises a base electrode, a three-dimensional porous carbon coating, a polysulfide coating and silver nanoparticles, the three-dimensional porous carbon coating is coated on the outer surface of the base electrode, the polysulfide coating is coated on the outer surface of the three-dimensional porous carbon coating, and the silver nanoparticles are wrapped on the outer surface of the polysulfide coating to form a silver nanoparticle/polysulfide/three-dimensional porous carbon modified electrode. The invention also provides a method of preparing the electrochemical sensor and an electrochemical detection method. The silver nanoparticle/polysulfide/three-dimensional porous carbon modified electrode provided by the invention can be used as an electrochemical sensor having the advantages of simple operation and low test cost, canrealize specific detection of trichloroacetic acid, and has high detection sensitivity, low detection limit, high accuracy of detection results and good selectivity.

Description

technical field [0001] The invention relates to the field of chemical analysis and detection, in particular to an electrochemical sensor and its preparation method and application. Background technique [0002] Trichloroacetic acid (TCA), also known as trichloroacetic acid, is an important organic chlorine pollutant. Because it is very soluble in water, TCA widely exists in water bodies. Trichloroacetic acid will not only affect the environment, but also cause serious harm to human health. The harm of trichloroacetic acid to the human body mainly includes its carcinogenicity, teratogenicity and mutagenicity, which can induce liver peroxidase Body proliferation, increased risk of adenoma and hepatocellular carcinoma. Therefore, it is extremely important to detect the concentration of trichloroacetic acid in water, and it is urgent to develop a simple, fast and sensitive method to detect the content of trichloroacetic acid. [0003] In the prior art, gas chromatography and l...

Claims

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Application Information

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IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/30G01N27/48
Inventor 郭慢丽冯也雷艳明王福越王露雨
Owner SOUTH CHINA NORMAL UNIVERSITY
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