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Ammonia gas sensor based on vanadium disulfide nanosheet as well as preparation method and application thereof

An ammonia gas sensor, vanadium disulfide technology, applied in the direction of material resistance, etc., can solve the problems of low sensitivity, high cost, poor repeatability, etc., and achieve the effect of good repeatability and high detection limit

Active Publication Date: 2021-09-24
深圳万物传感科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the invention provides a kind of ammonia sensor based on vanadium disulfide nanosheets, and the present invention also provides a kind of ammonia sensor based on vanadium disulfide nanosheets The preparation method of ammonia gas sensor and the application of ammonia gas sensor based on vanadium disulfide nanosheets to solve the defects of high cost, inconvenient to carry, poor repeatability and low sensitivity of existing ammonia gas detection equipment

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  • Ammonia gas sensor based on vanadium disulfide nanosheet as well as preparation method and application thereof
  • Ammonia gas sensor based on vanadium disulfide nanosheet as well as preparation method and application thereof
  • Ammonia gas sensor based on vanadium disulfide nanosheet as well as preparation method and application thereof

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preparation example Construction

[0038] In a second aspect, the present invention also provides a method for preparing an ammonia sensor based on vanadium disulfide nanosheets as described in the first aspect, comprising the following steps:

[0039] Provide vanadium disulfide nanosheets and disperse them in the first organic solvent to obtain a solution of 5-100 mg / ml vanadium disulfide nanosheets, apply the vanadium disulfide nanosheets solution to a sensing base column, and dry to prepare Ammonia gas sensor based on vanadium disulfide nanosheets;

[0040] The first organic solvent is isopropanol, N-methylpyrrolidone or a mixture of the two, the average size of the vanadium disulfide nanosheets is 50-500 nm, and the PDI of the vanadium disulfide nanosheets is not greater than 0.3.

[0041] Preferably, the vanadium disulfide nanosheets are prepared by the following steps:

[0042] Vanadium disulfide powder is provided and dispersed in a second organic solvent to obtain a pre-dispersion of vanadium disulfide...

Embodiment 1

[0052] like figure 1Shown is an ammonia gas sensor based on vanadium disulfide nanosheets according to an embodiment of the present invention. The ammonia sensor based on vanadium disulfide nanosheets includes a sensing base column 1 and a vanadium disulfide nanosheet coating 2 coated on the surface of the sensing base column. The vanadium disulfide nanosheet coating 2 includes vanadium disulfide nanosheets. piece. The vanadium disulfide nanosheet coating 2 is coated on the surface of the sensing base 1 for detecting ammonia gas, and the electrodes on both sides are electrically connected to the two ends of the vanadium disulfide nanosheet coating 2 respectively. When it is necessary to detect ammonia, the ammonia sensor based on vanadium disulfide nanosheets is placed in the ammonia detection environment and the vanadium disulfide nanosheet coating 2 is heated, and the vanadium disulfide nanosheet coating 2 contacts ammonia. After gas, the resistance value decreases signifi...

Embodiment 2

[0057] The present invention also provides a mask based on the ammonia sensor of vanadium disulfide nanosheets, such as figure 2 As shown, the mask includes a mask body 4 and an ammonia sensor 5 based on vanadium disulfide nanosheets embedded in the mask, a single-chip microcomputer system 6 and an LED indicator light 7, and an ammonia sensor 5 and an LED based on vanadium disulfide nanosheets. The indicator lights 7 are electrically connected with the single-chip microcomputer system 6 respectively. When the ammonia sensor 5 based on vanadium disulfide nanosheets detects ammonia, it sends an indication signal to the single-chip system 6, and the single-chip system 6 controls the LED indicator light 7 to emit light after receiving the indication signal to indicate the presence of ammonia in the environment.

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Abstract

The invention provides an ammonia gas sensor based on a vanadium disulfide nanosheet. The ammonia gas sensor comprises a sensing base column and the vanadium disulfide nanosheet, wherein a surface of the sensing base column is coated with the vanadium disulfide nanosheet; the average size of the vanadium disulfide nanosheet is 50-500 nm, and the PDI of the vanadium disulfide nanosheet is not greater than 0.3. The ammonia gas sensor based on the vanadium disulfide nanosheet has advantages of being high in detection limit, capable of reaching the ppm level, good in repeatability, convenient to carry, low in detection cost and the like. The invention also provides a preparation method and application of the ammonia gas sensor based on the vanadium disulfide nanosheet.

Description

technical field [0001] The invention relates to the technical field of semiconductor nanomaterials, in particular to an ammonia sensor based on vanadium disulfide nanosheets and its preparation method and application. Background technique [0002] Ammonia is one of the major air pollutants. Exposure to low concentrations of ammonia can cause symptoms such as rhinitis, pharyngitis, sore throat, and expectoration. Exposure to higher concentrations of ammonia can burn the skin, eyes, and mucous membranes of respiratory organs, leading to hemoptysis, pulmonary edema, and even cancer. Ammonia is an important "marker" for disease diagnosis. The abnormal concentration of ammonia gas in the breath can be used to realize early warning of diseases such as renal failure. Therefore, detecting the concentration of ammonia gas in the breath can be used as a simple, effective and painless method for early diagnosis of diseases, which can save the lives of more patients. Precious life. ...

Claims

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Application Information

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IPC IPC(8): G01N27/14
CPCG01N27/14Y02A50/20
Inventor 康建龙张晨
Owner 深圳万物传感科技有限公司
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