A composite nano-film material and gas sensing element based on graphene quantum dot functionalization

Abstract

The invention discloses a composite nano-film material based on the functionalization of graphene quantum dots. The composite nano-film material is in the shape of a film, the main body is ZnO nanosheets, and the surface is covered with graphene quantum dots and tin dioxide quantum grains; as The main ZnO nanosheets are hexagonal, with an average side length of 1.5-2.4 μm and an average thickness of 50-100 nm; the average size of graphene quantum dots is 3.2-4.3 nm, and the average size of tin dioxide quantum grains is 3.5- 5.2nm. The invention comprehensively uses the hydrothermal method and the post-heat steaming method to prepare the multi-level structure sensing material, and the synthesis method is simple and the cost is low.

Description

A kind of composite nano film material based on graphene quantum dot functionalization and gas sensor inductive element technical field The present invention relates to the technical field of semiconductor oxide gas sensors, in particular to a kind of use based on the amount of graphene Gas sensing element of subdot-functionalized composite nanofilm material. Background technique [0002] The non-invasive diagnostic technology based on metal oxide semiconductor gas sensors has the advantages of fast dynamic process, low cost, and high reliability. Good portability and other advantages. Real-time detection of biomarkers in exhaled breath has become a hot research topic. These sensors can By detecting the presence of specific volatile organic compounds (VOCs, volatile organic compounds) in human exhaled breath compounds, volatile organic compounds) as disease biomarkers to diagnose diseases, VOCs are strongly associated with specific diseases sex. Previous studies...

AI Technical Summary

Problems solved by technology

However, due to its own characteristics, the size of the nanoparticles in the nanostructures usually prepared by the hydrothermal synthesis method is more than 10 nanometers, which is not conducive to obtaining high-performance sensing materials.

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