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Moisture-resistant olfactory visual detection sensor based on metal organic framework, dye and covalent organic framework composite functional material

A technology of covalent organic framework and metal organic framework, which is applied in the direction of analyzing materials through chemical reactions, analyzing materials, and analyzing materials through optical means. It can solve the problems of being easily disturbed by environmental humidity and achieve good resistance to humidity. Jamming ability and stability, effect of good sensitivity

Pending Publication Date: 2022-06-24
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the olfactory visual detection is easily disturbed by environmental humidity, the present invention provides a sensor for visual detection of VOCs based on the composite functional material (MOF@dye@COF) of metal organic framework, dye molecule and covalent organic framework, which overcomes the Traditional gas-sensitive materials (dye molecules) produce drift signals to water molecules in the air and are susceptible to environmental humidity interference. The stable detection of VOCs gas signal molecules has been realized, and the ability of the olfactory visual detection system to resist humidity interference has been improved.

Method used

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  • Moisture-resistant olfactory visual detection sensor based on metal organic framework, dye and covalent organic framework composite functional material
  • Moisture-resistant olfactory visual detection sensor based on metal organic framework, dye and covalent organic framework composite functional material
  • Moisture-resistant olfactory visual detection sensor based on metal organic framework, dye and covalent organic framework composite functional material

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Example 1 Preparation of MOF@dye@COF gas-sensing material

[0049] Weigh 10 mg of each of the 9 dyes and dissolve them into 100 mL of anhydrous ethanol solution to prepare different kinds of dye solutions. The nine dyes are: bromophenol blue, acridine orange, bromophenol red, catechol violet, bromocresol violet, bromothymol blue, m-cresol violet, bromocresol green, and cresol red. Weigh 100mg of NH 2 -UiO-66(Zr) was added to the above dye solution, stirred for 12 h, centrifuged, washed three times with absolute ethanol, and finally vacuum dried to obtain MOF@ dye.

[0050] 11 mg of 2,5-divinyl-1,4-benzenedicarboxaldehyde was weighed and dissolved in 5 mL of acetonitrile solution, and 30 mg of MOF@dye was added into it, followed by ultrasonic dissolution. After the complete dissolution, 0.3 mL of acetic acid solution with a concentration of 12 M was added, mixed uniformly and sonicated for 30 min. Subsequently, 5 mL of an acetonitrile solution containing 14 mg of 1,3,...

Embodiment 2

[0056] Example 2 Preparation of the sensor

[0057] Pipette 5 mg of 9 kinds of MOF@dye@COF powders into a 1 mL centrifuge tube, add 100 μL of absolute ethanol, and obtain a MOF@dye@COF dispersion under the condition of ultrasound. 1 μL of MOF@dye@COF dispersion droplets were taken on the PVDF membrane with a pipette, and dried on a heating plate at 70 °C for 30 min to obtain an array sensor containing 9 colorimetric sensing units.

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Abstract

The invention discloses a moisture-resistant olfactory visual detection sensor based on a metal organic framework, dye and covalent organic framework composite functional material. The array type colorimetric sensor is characterized in that colorimetric sensing units are formed by a gas sensitive material, the gas sensitive material is an MOF (at) dye (at) COF composite functional material, and a plurality of colorimetric sensing units are uniformly distributed on a substrate to form the array type colorimetric sensor; the preparation method comprises the following steps: firstly, adding MOF powder into an ethanol solution of the dye, fully stirring, centrifuging to obtain a precipitate, washing and drying to obtain an MOF dye; adding the MOF dye into the first COF ligand solution for ultrasonic dissolution; adding a catalyst for ultrasonic dissolution; adding a second COF ligand solution for ultrasonic dissolution; standing and reacting for 3 days at normal temperature; and finally, centrifuging to obtain a precipitate, washing and drying to obtain the MOF (at) dye (at) COF composite functional material. The device can resist interference of water molecules in air, shows good humidity interference resistance and stability in actual detection, can effectively enrich VOCs gas molecules, and has good sensitivity.

Description

technical field [0001] The invention relates to a novel functional nanomaterial and an olfactory visual detection sensor in the field of olfactory visual perception, in particular to a preparation method and application of an olfactory visual detection sensor based on a metal organic framework@dye@covalent organic framework. Background technique [0002] Volatile Organic Compounds (VOCs) are common signaling molecules in biological systems. There are many kinds of it, mainly including halogenated hydrocarbons, alcohols, polycyclic aromatic hydrocarbons, alkanes, ketones, olefins, ethers, etc. When organisms encounter stress and other situations, the released VOCs signaling molecules are often different. By detecting and analyzing the VOCs components released by the organism, the state of the organism can be discriminated. This method has been successfully applied in plant disease, food flavor, human disease diagnosis and so on. Therefore, it is of great significance to de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25G01N21/78C08G12/08
CPCG01N21/25G01N21/783C08G12/08
Inventor 应义斌王晓王一娴
Owner ZHEJIANG UNIV
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