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Electrochemical sulfur dioxide sensor and preparation method of high-stability counter electrode

A sulfur dioxide and sensor technology, applied in the direction of electrochemical variables of materials, etc., can solve the problems of random drift, temperature drift, etc., and achieve the effects of low manufacturing difficulty, low cost, and easy portability.

Pending Publication Date: 2022-01-07
南京伊桥科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for gas sensors, the factors leading to their temperature drift are more complex, such as the aging of the sensor itself, the selection and preparation of electrode materials, changes in environmental factors, etc., may cause its temperature drift.
Moreover, the law of drift is often random, and it is difficult for people to establish a mathematical model applicable to any environmental factors.

Method used

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  • Electrochemical sulfur dioxide sensor and preparation method of high-stability counter electrode
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  • Electrochemical sulfur dioxide sensor and preparation method of high-stability counter electrode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: the preparation of a highly stable counter electrode 4 of an electrochemical sulfur dioxide sensor comprises the following steps:

[0048] S1: Take the carbon-supported platinum mixture with a mass ratio of platinum nanomaterials and carbon of 3:1, add polyvinylidene fluoride particles, the mass ratio of carbon-supported platinum mixture to polyvinylidene fluoride particles is 3:1, and stir magnetically for 12 hours to prepare Obtain electrode slurry;

[0049] S2: apply the electrode slurry on the electrode film by screen printing, and dry at 55°C for 24 hours to prepare an electrode film;

[0050] S3: cutting the electrode membrane prepared in step S2 to obtain a finished counter electrode 4;

[0051] S4: Assemble the counter electrode 4 into the electrochemical sulfur dioxide sensor.

Embodiment 2

[0052] Embodiment 2: the preparation of a highly stable counter electrode 4 of an electrochemical sulfur dioxide sensor, comprising the following steps:

[0053] S1: Take the carbon-supported platinum mixture with a mass ratio of platinum nanomaterials and carbon of 5:1, add polyvinylidene fluoride particles, the mass ratio of carbon-supported platinum mixture to polyvinylidene fluoride particles is 5:2, and stir magnetically for 24 hours to prepare Obtain electrode slurry;

[0054] S2: apply the electrode paste on the electrode film by screen printing, and dry at 60°C for 24 hours to prepare an electrode film;

[0055] S3: cutting the electrode membrane prepared in step S2 to obtain a finished counter electrode 4;

[0056] S4: Assemble the counter electrode 4 into the electrochemical sulfur dioxide sensor.

Embodiment 3

[0057] Embodiment 3: the preparation of a highly stable counter electrode 4 of an electrochemical sulfur dioxide sensor, comprising the following steps:

[0058] S1: Take the carbon-supported platinum mixture with a mass ratio of platinum nanomaterials and carbon of 7:1 and add polyvinylidene fluoride particles. The mass ratio of the carbon-supported platinum mixture to polyvinylidene fluoride particles is 7:1, and stir magnetically for 36 hours. Obtain electrode slurry;

[0059] S2: apply the electrode slurry on the electrode film by screen printing, and dry at 65°C for 24 hours to prepare an electrode film;

[0060] S3: cutting the electrode membrane prepared in step S2 to obtain a finished counter electrode 4;

[0061] S4: Assemble the counter electrode 4 into the electrochemical sulfur dioxide sensor.

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PUM

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Abstract

An electrochemical sulfur dioxide sensor is provided by the invention, and comprises a shell with a detachable top cover, the top cover of the shell is provided with a gas inlet hole for gas to enter, the shell is of a hollow structure, electrolyte is stored in the shell, and a working electrode, a reference electrode and a counter electrode are sequentially arranged in the shell from the opening direction of the top cover to the other side. Three pins communicated with an external circuit are arranged on one side, deviating from the top cover, of the shell; and the three pins are respectively connected with the working electrode, the reference electrode and the counter electrode. The sensor can significantly improve zero temperature drift, and has good sensitivity and stability. Meanwhile, the structure is simple, manufacturing difficulty is low, cost is low, and carrying is convenient. The invention further provides a preparation method of the high-stability counter electrode.

Description

technical field [0001] The invention relates to the technical field of gas sensors, in particular to an electrochemical sulfur dioxide sensor. Background technique [0002] Sulfur dioxide (SO 2 ) gas is the main source of acid rain, and sulfur dioxide mainly comes from the exhaust of vehicles, airplanes and other vehicles, as well as the combustion of coal and fossil fuels in power plants. Sulfur dioxide is also a gas harmful to human health. Short-term exposure to high concentrations of sulfur dioxide will seriously damage the respiratory system. Long-term living or working in an environment containing a small amount of sulfur dioxide can also cause respiratory diseases and affect human health. In view of these environmental and safety issues, it is very important to monitor the concentration of sulfur dioxide in the environment. In practice, sulfur dioxide sensors are usually used for environmental monitoring. [0003] In the use of sulfur dioxide sensor monitoring, in o...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/28G01N27/30
CPCG01N27/26G01N27/28G01N27/30
Inventor 杨丹丹张文庆马俊平张东旭
Owner 南京伊桥科技有限公司