Sensing equipment capable of detecting ethanol in high-temperature environment and processing method

A technology for high-temperature environment and sensing equipment, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., and can solve problems such as inability to detect gases

Pending Publication Date: 2021-07-30
CHONGQING UNIV OF ARTS & SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a sensing device and processing method capable of detecting ethanol in a high-temperature environment, ...

Method used

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  • Sensing equipment capable of detecting ethanol in high-temperature environment and processing method
  • Sensing equipment capable of detecting ethanol in high-temperature environment and processing method

Examples

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Embodiment 1

[0033] The present invention is a kind of sensing device that can detect ethanol under high temperature environment, comprises: silicon substrate, electrode layer and thin film sensitive material layer, and electrode layer is a comb electrode, and sensitive material layer is made of SnO 2 Composed of thin films, the detection object of the sensitive material layer is ethanol in a high temperature environment.

[0034] In this example, the preparation of SnO 2 The film steps are as follows:

[0035] S1. Weigh 0.35g SnCl 4 ·5H 2 O dissolve it in solution A, solution A is prepared by 10ml deionized water and 10ml ethanol;

[0036] S2. Adjust the pH value of solution A by using NaOH solution with pH=13 until the pH of solution A=4 to obtain solution B;

[0037] S3. Add 1ml polyethylene glycol to solution B, stir and sonicate for 30min to obtain solution C;

[0038] S4. Pour solution C into a reaction kettle with a filling rate of 70% to 75%, and put it into a hydrothermal dry...

Embodiment 2

[0045] The only difference from Embodiment 1 is that the detection unit, the conversion unit, the processing unit, the early warning unit and the protective shell, the detection unit, the conversion unit, the processing unit and the early warning unit are all packaged inside the protective shell. When it is necessary to detect the ethanol concentration in the high-temperature environment, first, the detection unit detects the ethanol content in the high-temperature environment in the form of an electrical signal; then, the conversion unit converts the electrical signal into a digital signal; then, the processing unit processes the digital signal and Obtain the ethanol concentration, judge the size of the ethanol concentration and the preset threshold, and send an instruction to start the early warning when the ethanol concentration is greater than or equal to the preset threshold; finally, the early warning unit receives the instruction to start the early warning and performs an...

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Abstract

The invention relates to the technical field of preparation of sensitive materials of gas sensors and particularly relates to sensing equipment capable of detecting ethyl alcohol in a high-temperature environment and a processing method. The processing method comprises the following steps of weighing 0.35 g of SnCl4.5H2O, dissolving the SnCl4.5H2O in a solution prepared from 10 ml of deionized water and 10 ml of ethyl alcohol, and adjusting a pH value of the solution to 4 by using NaOH with the pH value of 13; adding 1ml of polyethylene glycol into the solution, stirring and carrying out ultrasonic treatment for 30 minutes, pouring the stirred solution into a reaction kettle, putting the reaction kettle into a hydrothermal drying box, and carrying out hydrothermal reaction at 220 DEG C for 12 hours; taking out liquid in the reaction kettle, and filtering to obtain white precipitate; pouring the white precipitate into a beaker, and drying to obtain SnO2 powder; and carrying out heat treatment on the SnO2 powder in a tubular furnace to finally obtain the treated SnO2 film. The method is advantaged in that the SnO2 film obtained by the invention also has better response in a high-temperature environment of 300-400 DEG C, and the method can realize detection of ethanol in the high-temperature environment.

Description

technical field [0001] The invention relates to the technical field of preparation of sensitive materials for gas sensors, in particular to a sensing device capable of detecting ethanol in a high-temperature environment and a processing method. Background technique [0002] The gas sensor is a sensor used to detect gas concentration and composition, and converts the gas type and its concentration-related information into electrical signals. information, so that detection, monitoring, and alarm can be performed, and an automatic detection, control, and alarm system can be composed of an interface circuit and a computer, which plays an extremely important role in environmental protection and safety supervision. Especially in recent years, the gas sensor has been widely used in the detection of ethanol or alcohol, whether it is ethanol production enterprises, hospitals, or traffic police departments have a great demand. [0003] In this regard, Chinese patent CN101329357A disc...

Claims

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 张晓宇伏春平夏继宏程正富杨文耀郝禧元杨邦朝
Owner CHONGQING UNIV OF ARTS & SCI
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