Three-dimensional nanoflower composite gas sensitive material, preparation method and application thereof

Abstract

The present application relates to a kind of three-dimensional nanoflower composite gas sensitive material and its preparation method and application, belong to gas sensitive material technical field.To solve the problem that there is no accurate, fast, low-cost low-concentration nitrogen dioxide detection method in the field of environmental monitoring, the present application obtains composite gas sensitive material with three-dimensional nanoflower structure by heating treatment of tungsten disulfide precursor and selenium powder.The present application realizes the regulation of three-dimensional nanoflower morphology by selenium doping, improves the sensitivity of gas sensitive material by improving the contact probability between active sites of gas sensitive material and NO2 gas molecules, and shortens the response time.Gas sensitive element is prepared using the gas sensitive material provided by the present application, which is used for NO2 gas detection at room temperature, and the sensitivity for 0.03ppm NO2 gas is 1.3, the response time is 10.7 seconds, which can realize accurate and rapid detection of low-concentration NO2 gas below 0.1ppm, and has important application prospect in the field of NO2 gas detection.

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