Electrochemical electrode for detecting copper ions and preparation method and application thereof

An electrochemical and copper ion technology, applied in the field of electrochemical analysis and detection, can solve the problems of weak detection signal, low detection accuracy, weak activity, etc., and achieve the effects of high sensitivity, improved detection accuracy and simple preparation method.

Inactive Publication Date: 2017-08-29
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Hydroxypropyl cellulose can effectively improve the dispersion of carbon nanotubes, increase effective reaction sites, and increase the effective specific surface area. Carbon nanotubes can improve the selectivity of electrodes as active materials, but in this method, the electrode used The activity of the material is weak, and when detecting trace copper ions, the detection signal is weak and the detection accuracy is low

Method used

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  • Electrochemical electrode for detecting copper ions and preparation method and application thereof
  • Electrochemical electrode for detecting copper ions and preparation method and application thereof
  • Electrochemical electrode for detecting copper ions and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) Gently wipe the surface of the glassy carbon electrode with wet lens tissue to remove dirt. Use 0.3μm and 0.05μm alumina polishing powder to polish the electrode into a "mirror surface" on the polishing cloth in turn, rinse the surface of the electrode with deionized water, and immerse the electrode in absolute ethanol and deionized water for ultrasonic cleaning for 2 to 3 minutes. Let it dry naturally, and use it as a conductive base material for later use;

[0049] 2) Prepare a solution, wherein: the concentration of carbon black is 0.35g / L, the concentration of graphene oxide is 0.2g / L, the solvent is deionized water, and ultrasonic treatment is performed for 90 minutes;

[0050] 3) 2.4g SnCl 4 ·5H 2 O was dissolved in 20 mL deionized water to prepare 0.24 M SnCl 4 solution, and 8 mL of the solution prepared in step 2) was added. The mixed solution was placed in a magnetic stirrer and stirred for 5 hours, then placed in a centrifuge for separation for 5 minute...

Embodiment 2

[0059] 1) Gently wipe the surface of the electrode with wet lens tissue to remove dirt. Use 0.3μm and 0.05μm alumina polishing powder to polish the electrode into a "mirror surface" on the polishing cloth in turn, rinse the surface of the electrode with deionized water, and immerse the electrode in absolute ethanol and deionized water for ultrasonic cleaning for 2 to 3 minutes. Let it dry naturally, and use it as a conductive base material for later use;

[0060] 2) Prepare a solution, wherein: the concentration of carbon nanotubes is 0.25g / L, the concentration of graphene oxide is 0.2g / L, the concentration of activated carbon is 0.01g / L, the solvent is deionized water, and ultrasonic treatment is performed for 90 minutes;

[0061] 3) 2.4gSnCl 4 ·5H 2 O was dissolved in 20 mL deionized water to prepare 0.24 M SnCl 4 solution, and 8 mL of the solution prepared in step 2) was added. The mixed solution was placed in a magnetic stirrer and stirred for 5 hours, then placed in a...

Embodiment 3

[0068] 1) Gently wipe the surface of the electrode with wet lens tissue to remove dirt. Use 0.3μm and 0.05μm alumina polishing powder to polish the electrode into a "mirror surface" on the polishing cloth in turn, rinse the surface of the electrode with deionized water, and immerse the electrode in absolute ethanol and deionized water for ultrasonic cleaning for 2 to 3 minutes. Let it dry naturally, and use it as a conductive base material for later use;

[0069] 2) Prepare the solution, wherein: the concentration of carbon black is 0.25g / L, the concentration of graphene oxide is 0.2g / L, the concentration of activated carbon is 6g / L, the solvent is deionized water, and ultrasonic treatment is performed for 90 minutes;

[0070] 3) 2.4gSnCl 4 ·5H 2 O was dissolved in 20 mL deionized water to prepare 0.24 M SnCl 4 solution, and 8 mL of the solution prepared in step 2) was added. The mixed solution was placed in a magnetic stirrer and stirred for 5 hours, then placed in a cent...

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Abstract

The invention provides an electrochemical electrode for detecting copper ions and a preparation method and application thereof. In an electrode modified material, SnO2 can be used as an active material, and RGO and a RGO / activated carbon mixture are used as active additives, and can improve the selectivity of the electrode. Carbon black and carbon nanotubes are used as conductive additives, and can play the role of signal amplification due to the high conductivity, a more obvious response current can be obtained in the detection of trace copper ions by use of the electrode, and the detection accuracy of the electrode is improved. The electrochemical electrode has the following advantages: simple preparation method, high sensitivity, good linear relationship between the current response strength and copper ion concentration, low ion detection limit, and wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of electrochemical analysis and detection, and in particular relates to an electrochemical electrode for detecting copper ions, a preparation method and application thereof. Background technique [0002] Copper ion is an essential trace element in living organisms and plays an important role in many physiological processes. But excess copper ions in the body can lead to Alzheimer's, Parkinson's, Wilson's and prions. With the massive discharge of copper-containing pollutants in industry, agriculture, transportation and other fields, copper has become an important environmental pollutant. Therefore, it is of great practical significance to design and develop a method with high sensitivity and good selectivity for the rapid detection of copper ions in biological samples and aqueous solutions. [0003] So far, methods for the determination of copper ions include colorimetry, fluorescence spectrometry, atomic a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333G01N27/30
CPCG01N27/333G01N27/30
Inventor 曾玮王天琪
Owner ANHUI UNIVERSITY
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