Gas sensitive material for detecting low-temperature formaldehyde at room temperature and preparation method thereof as well as formaldehyde gas sensor

Abstract

The invention provides a gas sensitive material for detecting low-temperature formaldehyde at room temperature and a preparation method thereof as well as a formaldehyde gas sensor and belongs to the technical field of gas sensitive sensors. The gas sensitive material is prepared from noble metal nanoparticles and a functionalized graphene binary compound material, wherein the mass ratio of the noble metal nanoparticles to the functionalized graphene binary compound material is 1 to (0.1 to 30); the gas sensitive material can be used for detecting formaldehyde gas with the concentration of ppb grade at room temperature. Therefore, compared with a traditional formaldehyde gas sensitive material, the gas sensitive material and the formaldehyde gas sensor containing the gas sensitive material do not need a high-temperature working environment, so that the power consumption and cost are extremely reduced and resources are saved, and furthermore, the formaldehyde gas sensor has a wider application field. Materials needed by each sensor substrate are relatively less so that the cost of the materials is relatively low and industrialized implementation of the formaldehyde gas sensor can be facilitated.

Description

technical field [0001] The invention relates to the technical field of gas-sensitive sensors, in particular to a gas-sensitive material for detecting low-concentration formaldehyde at room temperature, a preparation method thereof, and a formaldehyde gas sensor. Background technique [0002] With the improvement of people's living standards and the change of people's requirements for furniture environment decoration, the problem of indoor air quality has become increasingly prominent. The main indoor polluting gases after home decoration are formaldehyde and benzene series. Inhaling high concentrations of formaldehyde gas will cause great harm to the human body, such as headache, nausea, cough, and gastrointestinal disorders. According to relevant research, if the indoor formaldehyde gas concentration exceeds about 10 times the national indoor formaldehyde concentration standard, people in the room are equivalent to chronic suicide. Therefore, the detection of formaldehyde ...

AI Technical Summary

Problems solved by technology

[0003] There are many traditional formaldehyde detection methods, but most formaldehyde gas sensors are based on electrochemical measurement. Traditional sensors have disadvantages such as poor accuracy, insufficient selectivity, and large volume.

Moreover, the existing high-sensitivity formaldehyde gas sensors need to be detected under the condition of heating, and the power consumption is very large. Therefore, it is very meaningful to develop sensors with low power consumption, small component size, long life and low price.

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