Preparation method and application of gas-sensitive functional covalent organic framework material

Abstract

The invention relates to the technical field of gas sensing, and particularly discloses a preparation method of a gas-sensitive functional covalent organic framework material, which comprises the following steps: adding 2-hydroxy terephthalaldehyde, 1, 3, 6, 8-tetra (4-aminophenyl) pyrene, o-dichlorobenzene, n-butyl alcohol and an acetic acid aqueous solution into a reaction container; ultrasonically dispersing the mixture until the system is uniform, degassing through three times of freezing-pumping-unfreezing circulation, sealing in vacuum, and heating at 120 DEG C for 3 days; the reaction mixture is taken out and cooled to the room temperature, orange precipitates are collected through suction filtration and washed with THF, then Soxhlet extraction is conducted for 24 h with THF as a solvent, then vacuum drying is conducted for 3-5 h at the temperature of 120 DEG C, and the gas-sensitive functional covalent organic framework material is obtained. The method for preparing the gas-sensitive functional covalent organic framework material (TAPPY-HTPA-COF) porous nano composite material is simple, and the gas-sensitive functional covalent organic framework material (TAPPY-HTPA-COF) porous nano composite material is stable in structure, low in cost and sensitive in response to ammonia gas and can be used as a novel ammonia gas sensing material.

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