Color-sensitive gas sensing array based on nanofiber gas enrichment and preparation method thereof

Abstract

The invention discloses a color-sensitive gas sensing array based on nanofiber gas enrichment and a preparation method thereof. According to the color-sensitive gas sensing array, electrospinning nanofiber membranes are adopted as carriers, an acid-base indicator, porphyrin or phthalocyanine which has color change on gas is taken as a color-sensitive material, the electrospinning nanofiber membranes are processed into 1 cm round shapes, the round electrospinning nanofiber membranes are fixed with different color-sensitive materials respectively to serve as gas-sensitive units, and a plurality of gas-sensitive units constitute the color-sensitive gas sensing array. According to the color-sensitive gas sensing array based on nanofiber gas enrichment and the preparation method thereof, each electrospinning nanofiber membrane has a nano-porous structure and a huge specific surface area, and the carrier as the color-sensitive gas sensing array can improve gas adsorption capacity and can perform enrichment on to-be-detected gas; and moreover, through selection of materials of electrospinning nanofibers, the absorption affinity of the sensing array to different gases can be improved, the sensing array can perform selective enrichment on the to-be-detected gas, and accordingly, fast and flexible detection for low-concentration gas can be realized.

Description

[0001] technical field [0002] The invention relates to the technical field of gas detection, in particular to a color-sensitive gas sensing array based on nanofiber gas enrichment and a preparation method thereof. Background technique [0003] Fast and accurate gas detection and analysis is of great significance in the fields of environmental protection, chemical control, household alarm, food preservation, aerospace and public security and customs. The bionic electronic olfactory system based on gas sensing array is a research field that has just emerged in the past 20 years. This system imitates the biological olfactory system to achieve rapid, highly sensitive, and highly selective analysis and detection of gases. It has become a research hotspot at home and abroad. . The research and development of bionic olfactory systems based on gas sensing arrays abroad is earlier. At present, countries such as Britain, the United States, Germany, France and Sweden have commercial...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is to provide a color-sensitive gas sensing array based on gas enrichment of electrospun nanofibers, which solves the problem of poor sensitivity, slow response speed, and detection problems when the gas sensing array detects low-concentration gases in the prior art. The required gas sample volume is too large, etc.

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