Resistor type acetone sensor based on graphitizing carbonized nitrogen/stannic oxide composite material, preparation method, and application thereof

A technology of tin dioxide and composite materials, which is applied in the fields of material resistance, material analysis, and material analysis through electromagnetic means, and can solve the problems of inability to detect acetone, poor thermal stability of graphene, and restrictions on wide application and promotion. Achieve good response reversibility, improve performance, and improve sensitive performance

Active Publication Date: 2017-06-20
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The study found that graphene and its composite materials can indeed detect gas, but because there is no interaction between graphene and acetone molecules, graphene-based sensitive materials cannot detect acetone
Although graphene can be used as a dopant to regulate the structure of metal oxides, acetone detection can be realized under heating conditions, but the poor thermal stability of graphene limits its wide application and promotion.

Method used

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  • Resistor type acetone sensor based on graphitizing carbonized nitrogen/stannic oxide composite material, preparation method, and application thereof
  • Resistor type acetone sensor based on graphitizing carbonized nitrogen/stannic oxide composite material, preparation method, and application thereof
  • Resistor type acetone sensor based on graphitizing carbonized nitrogen/stannic oxide composite material, preparation method, and application thereof

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Effect test

Embodiment 1

[0029] (1) A pair of U-shaped gold electrodes with interdigital structure are printed on the upper surface of the ceramic sheet by using a ceramic sheet as a substrate. The gold electrode has a width of 200 μm and a thickness of 10 μm; under the ceramic sheet A layer of ruthenium dioxide is flatly printed on the surface as a heating layer, the thickness of the ruthenium dioxide is 20μm; a pair of strip-shaped gold electrodes are printed on the surface of the ruthenium dioxide layer, the width of the gold electrode is 400μm and the thickness is 10μm;

[0030] (2) Ultrasonic cleaning the upper surface of the ceramic sheet and the U-shaped gold electrode surface obtained in step (1) with ethanol and water, and drying;

[0031] (3) Prepare 5 mL of a nitrogen carbide aqueous solution with a concentration of 0.1 mg / mL, then add 0.023 mg of tin tetrachloride, and ultrasonically disperse to make it fully mixed to obtain a composite solution of carbon, nitrogen and tetrachloride. The weight...

Embodiment 2

[0035] (1) Using a ceramic sheet as a substrate, a pair of U-shaped gold electrodes with interdigital structure are printed on the upper surface of the ceramic sheet by screen printing. The gold electrode has a width of 200 μm and a thickness of 10 μm; on the lower surface of the ceramic sheet A layer of ruthenium dioxide is tiled as a heating layer, the thickness of the ruthenium dioxide is 30μm; a pair of strip-shaped gold electrodes are printed on the surface of the ruthenium dioxide layer, the width of the gold electrode is 500μm and the thickness is 10μm;

[0036] (2) Ultrasonic cleaning the upper surface of the ceramic sheet and the U-shaped gold electrode surface obtained in step (1) with ethanol and water, and drying;

[0037] (3) Prepare 5 mL of a nitrogen carbide aqueous solution with a concentration of 0.1 mg / mL, and then add 0.115 mg of tin tetrachloride, and ultrasonically disperse to make it fully mixed to obtain a composite solution of carbon, nitrogen and tetrachlori...

Embodiment 3

[0041] (1) Using the ceramic sheet as the substrate, a pair of U-shaped gold electrodes with interdigital structure are printed on the upper surface of the ceramic sheet by screen printing. The gold electrode has a width of 250 μm and a thickness of 20 μm; on the lower surface of the ceramic sheet A layer of ruthenium dioxide is tiled as a heating layer, the thickness of the ruthenium dioxide is 20μm; a pair of strip-shaped gold electrodes are printed on the surface of the ruthenium dioxide layer, the width of the gold electrode is 400μm and the thickness is 20μm;

[0042] (2) Ultrasonic cleaning the upper surface of the ceramic sheet and the U-shaped gold electrode surface obtained in step (1) with ethanol and water, and drying;

[0043] (3) Prepare 5 mL of aqueous solution of nitrogen carbide with a concentration of 0.3 mg / mL, then add 3.495 mg of tin tetrachloride, ultrasonically disperse to make it mix well, and prepare a composite solution of carbon, nitrogen and tetrachloride ...

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Abstract

The invention relates to a resistor type acetone sensor based on a graphitizing carbonized nitrogen/stannic oxide composite material, a preparation method, and application of the resistor type acetone sensor in detecting acetone, which belong to the technical field of gas sensors. A pair of U-shaped gold electrodes with interdigital structures printed on the upper surface of a ceramic chip are used as signal electrodes, a ruthenium dioxide film printed on the lower surface of the ceramic chip in a tiling way is used as a heating layer, a pair of strip-type gold electrodes printed on the surface of the ruthenium dioxide film are used as heating electrodes, and gas-sensing thin films are coated on the upper surface of the ceramic chip and the surfaces of the U-shaped gold electrodes. Each gas-sensing thin film is the graphitizing carbonized nitrogen/stannic oxide composite material, and has the thickness ranging from 10 to 50mu m; in the graphitizing carbonized nitrogen/stannic oxide composite material, the mass ratio of the graphitizing carbonized nitrogen to the stannic oxide is 1:(0.02 to 43). The sensor has higher response sensitivity, fast response recovery rate and favorable response reversibility, and solves the problem that pure-state metallic oxide responses slowly to the acetone.

Description

Technical field [0001] The invention belongs to the technical field of gas sensors, and specifically relates to a graphitized carbonized nitrogen-based resistive acetone sensor with good gas-sensitive response characteristics to acetone and a manufacturing method thereof, and in particular to a graphitized carbonized nitrogen-based / tin dioxide composite Material resistance type acetone sensor, manufacturing method and application in detecting acetone. Background technique [0002] With the development of industrial and agricultural production and the improvement of urban living standards, the problem of environmental pollution has become more and more prominent. As a typical toxic and harmful gas, acetone is not only an important raw material for the synthesis of organic compounds, but also a common solvent in industrial processes such as organic synthesis and chemical production. Especially acetone has strong volatility, and large-scale use of acetone has brought serious harm t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 刘森张彤韩天一王子莹费腾
Owner JILIN UNIV
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