Sensitive material for detecting acetone gas and preparation method thereof

A technology of sensitive materials and gas-sensitive materials, which is applied in the detection of acetone gas sensitive materials and its preparation, and in the field of sensitive materials can solve the problems of slow response recovery, poor anti-interference ability, and low sensitivity, and achieve fast response recovery and detection performance. Enhanced, high-sensitivity effects

Active Publication Date: 2018-11-06
河南森斯科传感技术有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a sensitive material for detecting acetone gas and a preparation method thereof, the semi-sensitive material for detecting acetone gas and its preparation method should solve the current The high-sensitivity acetone sensor in the existing technology has low sensitivity, slow response recovery, and poor anti-interference ability

Method used

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  • Sensitive material for detecting acetone gas and preparation method thereof
  • Sensitive material for detecting acetone gas and preparation method thereof
  • Sensitive material for detecting acetone gas and preparation method thereof

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Embodiment 1

[0037] A preparation method for a sensitive material for efficiently detecting acetone gas, comprising the steps of:

[0038] 1) Dissolve 0.4g P123 in 80ml of absolute ethanol solution, then add 0.8g WCl 6 Evenly dispersed in the solution, stirring until WCl 6 Dissolve completely;

[0039] 2) Put the final solution obtained in step 1) into the lining of a 100ml reactor, place the reactor in a high-temperature oven, heat it up to 180°C, keep it warm for 2 hours, and then cool down naturally;

[0040] 3) centrifuging and washing the mixed solution in step 2) for several times to collect the centrifuged product, then drying at constant temperature, and collecting the dried product;

[0041] 4) Weigh chitosan and melamine with a mass ratio of 1:4, put them into a porcelain boat and calcinate at 550°C for 3 hours;

[0042] 5) Take 15 mg of the product of step 4) and add it to 100 ml of isopropanol, and put it into a 30KHz ultrasonic cleaner for 2 hours;

[0043] 6) centrifuge t...

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Abstract

The invention provides a sensitive material for detecting acetone gas. The sensitive material is prepared by compounding a WO3 nano-sheet with C3N4, wherein the WO3 nano-sheet is used as a matrix, C3N4 is used as sensitizer, and the mass percentage of C3N4 in the sensitive material is between 0.5wt% and 10wt%. The invention also provides a preparation method of the sensitive material, which comprises: preparing an ultra-thin WO3 nano-sheet by a self-assembly method; ultrasonically peeling prepared C3N4 in a solvent to obtain a dispersion liquid; and dropwise adding the dispersion liquid to theWO3 nano-sheet layer according to the mass percentage to form a composite gas sensitive material. According to the invention, the acetone detection performance of the sensitive material is improved by modifying the WO3 nano-sheet with C3N4 with a two-dimensional layered structure. A gas sensitive test result shows that the gas sensitive element has the advantages of high sensitivity to acetone vapor, fast response recovery, good anti-interference ability, good stability and the like, and can be used to selectively detect acetone gas in respiratory gases.

Description

technical field [0001] The invention belongs to the field of semiconductor materials and relates to a sensitive material, in particular to a sensitive material for detecting acetone gas and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) in human exhaled breath are important markers for non-invasive, rapid and simple diagnosis of diseases. Among them, the concentration of acetone in human exhaled breath is a key indicator for diagnosing diabetes. An abnormal metabolism associated with incomplete digestion of glucose in the blood produces high levels of fatty acids that are converted to ketone bodies in the liver. These ketones are highly volatile compounds and readily evaporate during respiration. Therefore, a highly sensitive acetone vapor sensor is necessary for accurate diagnosis of diabetes. Chromatography-mass spectrometry (GC-MS) is the general method for the precise detection of breath marker traces in most cases. Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 王丁黄诗蒙于鑫王现英王超杨俊和
Owner 河南森斯科传感技术有限公司
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