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Gold film modified electrode for heavy metal detection and preparation method thereof

A technology for modifying electrodes and metal electrodes, applied in the field of electrochemical detection, can solve the problems of inability to integrate microchip integrated sensors, complex preparation processes of electrochemical sensors, poor stability and repeatability, etc., so as to reduce solution resistance and improve detection. Sensitivity, the effect of improving sensitivity

Pending Publication Date: 2021-11-26
广州钰芯智能科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although analyte electrochemical sensors have undergone evolution and development, they cannot get rid of the shortcomings of difficult preparation, difficult application, poor stability and reproducibility.
At the same time, the designed electrochemical sensor cannot be integrated into the integrated sensor of the microchip due to its complicated preparation process.

Method used

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  • Gold film modified electrode for heavy metal detection and preparation method thereof
  • Gold film modified electrode for heavy metal detection and preparation method thereof
  • Gold film modified electrode for heavy metal detection and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Preparation of gold film modified electrode:

[0064] 1. Preparation of gold layer

[0065] Taking epoxy resin as the electrode substrate, the surface of the substrate is sequentially modified with a Cu layer with a thickness of 30.0 μm and a Ni layer with a thickness of 8.0 μm for pretreatment. The specific steps are:

[0066] (1) Water washing: place the electrode in deionized water for ultrasonic treatment for 30s;

[0067] (2) Degreasing: put the electrode obtained in step (1) into absolute ethanol for ultrasonic treatment for 60s;

[0068] (3) Water washing: put the electrode obtained in step (2) into deionized water for ultrasonic treatment for 30s;

[0069] (4) Mask: Use polytetrachlorethylene tape to mask and package the electrode obtained in step (3), leaving an electrodeposition area of ​​0.136cm 2 ;

[0070] (5) Rust removal and coarsening: soak the electrode obtained in step (4) in 10% (volume fraction) sulfuric acid for 30-60 seconds;

[0071] (6) Wash...

Embodiment 2

[0076] Preparation of gold film modified electrode:

[0077] 1. Preparation of gold layer

[0078] Aluminum nitride ceramics are used as the electrode substrate, and the surface of the substrate is sequentially modified with a Cu layer with a thickness of 30.0 μm and a Ni layer with a thickness of 15.0 μm for pretreatment. The specific steps are as follows:

[0079] (1) Water washing: place the electrode in deionized water for ultrasonic treatment for 30s;

[0080] (2) Degreasing: put the electrode obtained in step (1) into absolute ethanol for ultrasonic treatment for 60s;

[0081] (3) Water washing: put the electrode obtained in step (2) into deionized water for ultrasonic treatment for 30s;

[0082] (4) Mask: Use polytetrachlorethylene tape to mask and package the electrode obtained in step (3), leaving an electrodeposition area of ​​0.135cm 2 ;

[0083] (5) Rust removal and coarsening: soak the electrode obtained in step (4) in 10% (volume fraction) sulfuric acid for 30-...

Embodiment 3

[0089] Preparation of gold film modified electrode:

[0090] 1. Preparation of gold layer

[0091] Alumina ceramics were used as the electrode substrate, and the surface of the substrate was sequentially modified with a Cu layer with a thickness of 15.0 μm and a Ni layer with a thickness of 6.0 μm for pretreatment. The specific steps were as follows:

[0092] (1) Water washing: place the electrode in deionized water for ultrasonic treatment for 30s;

[0093] (2) Degreasing: put the electrode obtained in step (1) into absolute ethanol for ultrasonic treatment for 60s;

[0094] (3) Water washing: put the electrode obtained in step (2) into deionized water for ultrasonic treatment for 30s;

[0095] (4) Mask: Use polytetrachlorethylene tape to mask and package the electrode obtained in step (3), leaving an electrodeposition area of ​​0.142cm 2 ;

[0096] (5) Rust removal and coarsening: soak the electrode obtained in step (4) in 10% (volume fraction) sulfuric acid for 30-60 se...

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Abstract

The invention provides a gold film modified electrode for heavy metal detection and a preparation method thereof, specifically, an electrochemical deposition method is adopted, a gold film is modified on the surface of an electrode substrate in situ, and a working electrode, a reference electrode and an auxiliary electrode are coplanar, so that the microminiaturization design with the electrode spacing of 1-100 microns is realized, the solution resistance is greatly reduced, the response of detection is improved, the electrode is applied to heavy metal detection, specifically six heavy metal ions of copper, lead, zinc, arsenic, tellurium and mercury, the purpose of rapidly and simply detecting heavy metals is achieved, and a new thought is provided for the design and application of high-reliability microsensors.

Description

technical field [0001] The invention belongs to the field of electrochemical detection, and in particular relates to a gold film modified electrode for heavy metal detection and a preparation method thereof. Background technique [0002] Heavy metal refers to the density of 4.5g / cm 3 above metal elements. At present, my country's heavy metal pollution is very serious, mainly including copper, zinc, arsenic, mercury, lead and so on. The main pollution is water pollution and soil pollution. The output of heavy metals in industrial wastewater is 24,300 tons, and 120,000 tons of food is polluted by heavy metals every year, causing direct economic losses of more than 20 billion yuan. Any of these heavy metals can cause headaches, dizziness, insomnia, forgetfulness, nervous disorders, joint pain, stones, cancers (such as liver cancer, gastric cancer, intestinal cancer, bladder cancer, breast cancer, prostate cancer, blackfoot disease and deformed children), etc. Therefore, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/30
CPCG01N27/48G01N27/308
Inventor 奚亚男胡保帅崔皓博
Owner 广州钰芯智能科技研究院有限公司
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