Novel ammonia gas sensor based on reduced graphene oxide-tungsten disulfide composite and preparation technology thereof
A gas sensor, tungsten disulfide technology, applied in the direction of analyzing materials, material resistance, material analysis by electromagnetic means, etc., can solve the problems of less research on gas sensitivity response, unstable signal, low response, etc., and achieve good gas sensitivity Response, improved stability and service life, reduced aging effects
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[0040] Example 1
[0041] This implementation provides a new type of ammonia gas sensor based on reduced graphene oxide-tungsten disulfide composite material and its preparation process, including a gas-sensitive composite material and a sensor substrate. Among them, the composite material is also a new type of original graphene oxide-tungsten disulfide composite material (see Figure 1, Figure 2, Figure 3), which is characterized by reduced graphene oxide-tungsten disulfide composite material as a new synthetic laminar gas sensitive material It is prepared by one-step heating method, and has good response characteristics to low-concentration ammonia gas. For example, to 30ppm ammonia gas, the gas-sensitive response Rs of the composite material at room temperature (20℃-30℃) is about 50. For the sensor substrate, its characteristic is that the thickness of the sensitive material coating is 0.4-0.5mm. The transient heating plate is attached to the back of the ceramic substrate of th...
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[0049] Example 2
[0050] The difference between the technical solution of this embodiment and Embodiment 1 is that the concentration of the test gas is different. In this embodiment, only the different parts are described, and the same parts will not be repeated. The test gas NH of this embodiment 3 , The test concentration is 10ppm, 20ppm, 30ppm, 40ppm, 50ppm. Image 6 In order to reduce the response signal Rs of graphene oxide-tungsten disulfide composite material to different concentrations of ammonia.
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