Zinc oxide/molybdenum sulfide thin film sensitive to extremely low concentration acetone

A low-concentration zinc oxide technology, applied in the field of gas sensors, achieves the effects of low raw material cost, good repeatability, and simple preparation

Active Publication Date: 2019-10-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, molybdenum disulfide is mostly used in the detection of ammonia (ACS Appl. Mater. Interfaces, 2017, 9, 6462-6471), and there are few reports on its application in the detection of acetone

Method used

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  • Zinc oxide/molybdenum sulfide thin film sensitive to extremely low concentration acetone
  • Zinc oxide/molybdenum sulfide thin film sensitive to extremely low concentration acetone
  • Zinc oxide/molybdenum sulfide thin film sensitive to extremely low concentration acetone

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Embodiment 1

[0022] Example 1, 0.5578 grams of zinc nitrate hexahydrate was dissolved in 15 milliliters of methanol, stirred for 15 minutes, 0.6158 grams of dimethylimidazole was mixed with 15 milliliters of methanol, stirred for 15 minutes, and dispersed uniformly by ultrasonic, then the zinc nitrate hexahydrate was mixed The solution was added dropwise into the dimethylimidazole solution, stirred at room temperature for 10 hours, centrifuged, washed with methanol several times, and then the centrifuged sample was vacuum-dried at 60° C. to obtain ZIF-8 powder. The above ZIF-8 powder was heat-treated in a tube furnace at 500°C for 2 hours in a nitrogen atmosphere, then at 350°C in an air atmosphere for 2 hours at a heating rate of 1°C / min, and finally zinc oxide powder was obtained ; Dissolve 0.06 gram of zinc oxide powder in 40 milliliters of deionized water, ultrasonic 60 minutes, obtain zinc oxide solution; Add 0.123 gram of ammonium molybdate tetrahydrate and 0.228 gram of thiourea to t...

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Abstract

The invention provides a preparation method of a zinc oxide / molybdenum sulfide thin film sensitive to extremely low concentration acetone. The preparation method belongs to the technical field of gassensitive sensors. The preparation method comprises the steps of performing thermal treatment on ZIF-8 to obtain zinc oxide, then subjecting the zinc oxide, a molybdenum source and a sulfur source tohydro-thermal synthesis to obtain zinc oxide / molybdenum sulfide, and conducting a gas sensitivity test. The sample still has a high response value (1.62) and short response / recovery time (23 sec / 35 sec) at extremely low concentration of 0.075 ppm of acetone. The sensor thin film preparation method is simple, the raw material cost is low, the material film performance is excellent, and the zinc oxide / molybdenum sulfide thin film has good application value and prospect.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, and in particular relates to the preparation of a zinc oxide / molybdenum sulfide thin film and the research on its gas-sensing performance to extremely low-concentration acetone. Background technique [0002] Acetone is an organic solvent for the manufacture of materials such as explosives, rubber, and fibers, and is also a raw material for the synthesis of organic substances such as ketene, polyisoprene rubber, and epoxy resin. It has a wide range of applications in industrial production (Sens.Actuators B:Chem. , 2015, 209, 368-376). At the same time, acetone is harmful to the human body. Exposure to acetone atmosphere for a long time, even a trace amount (≤1ppm) of acetone can cause chronic poisoning such as nose, throat, lung inflammation, headache, dizziness, and nausea. High concentrations of acetone can be sensed through the sense of smell (human's acetone olfactory threshold is about 1...

Claims

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Application Information

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IPC IPC(8): G01N27/333
CPCG01N27/3335
Inventor 薛庆忠常晓李小芳熊雅李坤乔煦容李潇
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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