Co-Sn composite oxide ethyl alcohol sensor and preparation and application thereof

A composite oxide and sensor technology, applied in the direction of material resistance, etc., can solve the problems of high detection limit and low sensitivity of sensors, achieve low detection limit, high sensitivity, and promote practical effects

Active Publication Date: 2015-12-23
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Co-Sn composite oxide ethyl alcohol sensor and preparation and application thereof
  • Co-Sn composite oxide ethyl alcohol sensor and preparation and application thereof
  • Co-Sn composite oxide ethyl alcohol sensor and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The Co-Sn composite oxide with a Co / Sn molar ratio of 0.67:1 in the reactant is used as a sensitive material to make an ethanol sensor. The manufacturing process is

[0038] (1) First, 7.35gNa 3 C 6 h 5 o 7 2H 2 O, 0.9gSnCl 2 2H 2 O, 1.43gCoCl 2 ·6H 2 O, 5ml ethylenediamine, 10mlNaOH (0.4M) solution was dissolved in 20ml water under the stirring situation, stirred for 30 minutes to form a homogeneous solution;

[0039] (2) Put the mixed solution of (1) into a 45ml polytetrafluoroethylene kettle and seal it, put it in an oven at 180°C for 12 hours, cool down to room temperature naturally after the end, collect the samples with ethanol and deionized water and centrifuge them and place them in the culture Collect samples at 80°C for several hours in the dish;

[0040] (3) Calcining the above-mentioned nanometer gas-sensitive material at 300°C for 2 hours to obtain a gas-sensitive material, mixing the sensitive material with deionized water into a paste, and then e...

Embodiment 2

[0043] The Co-Sn composite oxide with a Co / Sn molar ratio of 1:1 in the reactant is used as a sensitive material to make an ethanol sensor. The manufacturing process is as follows:

[0044] (1) First, 5.88gNa 3 C 6 h 5 o 7 2H2O, 0.9gSnCl 2 2H 2 O, 0.95gCoCl 2 ·6H 2 O, 5ml ethylenediamine, 10mlNaOH (0.4M) solution was dissolved in 20ml water under the stirring situation, stirred for 30 minutes to form a homogeneous solution;

[0045] (2) Put the mixed solution of (1) into a 45ml polytetrafluoroethylene kettle and seal it, put it in an oven at 180°C for 12 hours, cool down to room temperature naturally after the end, collect the samples with ethanol and deionized water and centrifuge them and place them in the culture Collect samples at 80°C for several hours in the dish;

[0046] (3) Calcining the above-mentioned nanometer gas-sensitive material at 300°C for 2 hours to obtain a gas-sensitive material, mixing the sensitive material with deionized water into a paste, and ...

Embodiment 3

[0049] The Co-Sn composite oxide with a Co / Sn molar ratio of 2:1 in the reactant is used as a sensitive material to make an ethanol sensor. The manufacturing process is as follows:

[0050] (1) First, 4.41gNa 3 C 6 h 5 o 7 2H 2 O, 0.9gSnCl 2 2H 2 O, 0.476gCoCl 2 ·6H 2 O, 5ml ethylenediamine, 10mlNaOH (0.4M) solution was dissolved in 20ml water under the stirring situation, stirred for 30 minutes to form a homogeneous solution;

[0051] (2) Put the mixed solution of (1) into a 45ml polytetrafluoroethylene kettle and seal it, put it in an oven at 180°C for 12 hours, cool down to room temperature naturally after the end, collect the samples with ethanol and deionized water and centrifuge them and place them in the culture Collect samples at 80°C for several hours in the dish;

[0052] (3) Calcining the above-mentioned nanometer gas-sensitive material at 300°C for 2 hours to obtain a gas-sensitive material, mixing the sensitive material with deionized water into a paste, ...

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Abstract

Provided are a Co-Sn composite oxide ethyl alcohol sensor prepared through a one-step water heating method, a preparation method and an application of the Co-Sn composite oxide ethyl alcohol sensor in detecting ethyl alcohol concentration in drunken driving and the atmospheric environment, and belongs to the technical field of gas sensors. The sensor is composed of an Al2O3 insulation ceramic tube sold in the market, Co-Sn composite oxide sensitive materials and a nickel-cadmium heating coil, wherein the outer surface of the Al2O3 insulation ceramic tube is provided with two annular gold electrodes, the outer surfaces of the annular gold electrodes and the outer surface of the Al2O3 insulation ceramic tube are coated with the Co-Sn composite oxide sensitive materials, and the nickel-cadmium heating coil penetrates through the interior of the Al2O3 insulation ceramic tube. The sensor has good linearity on ethyl alcohol with low concentration (a lower limit of detection is 1 ppm), the Co-Sn composite oxide ethyl alcohol sensor can be well applied to alcohol detection in drunken driving and the atmospheric environment due to the characteristics, and then driver driving safety and environment safety can be judged by detecting the ethyl alcohol concentration.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, and in particular relates to a Co-Sn composite oxide ethanol sensor prepared by a one-step hydrothermal method, a preparation method and its application in detecting ethanol concentration in drunk driving and atmospheric environment. Background technique [0002] Distinguished from the way of use, ethanol sensors are divided into disposable ethanol sensors and multiple reusable sensors. Commercially available breath alcohol testers are sensors that are reused many times. The research hotspots are more inclined to the development of sensor miniaturization, rapidity, accuracy and precision. Various new materials and new technologies emerge in an endless stream, and are also widely used in ethanol sensors. [0003] Ethanol is an important industrial raw material, which is widely used in chemical industry, food industry, daily chemical industry, medical and health and other fields, and at the sa...

Claims

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Application Information

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IPC IPC(8): G01N27/12
Inventor 王庆吉韩思雨綦振伟
Owner JILIN UNIV
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