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Gas sensitive sensor for detecting acetone and application thereof

A gas sensor, acetone technology, applied in instruments, measuring devices, scientific instruments, etc., can solve problems such as complex sensor manufacturing technology, and achieve significant response and reversibility, easy post-processing, and fast response and recovery time.

Pending Publication Date: 2022-01-14
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of carbon nanotubes functionalized with porphyrin and its derivatives for the detection of organic volatile gases requires complex sensor fabrication techniques.

Method used

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  • Gas sensitive sensor for detecting acetone and application thereof
  • Gas sensitive sensor for detecting acetone and application thereof
  • Gas sensitive sensor for detecting acetone and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Disperse 40 mg of multi-walled carbon nanotubes in 4 mL of N,N-dimethylformamide and ultrasonically disperse them evenly, then add 1 mg / mL of tetraaminophenylnickel porphyrin solution to the above system In, let stand for 24h.

[0043] (2) The product is completely separated by centrifugation, and then the crude product is washed with N,N-dimethylformamide until it is colorless, and the multi-walled carbon nanotube product functionalized with tetraaminophenylnickel porphyrin is collected and dried .

[0044] (3) A printed electrode consisting of 10 pairs of interdigitated electrodes was deposited on the paper substrate by spraying gold, and then 5 mg / mL tetraaminophenylnickel porphyrin-functionalized multi-walled carbon nanotube suspension was carefully dropped on the On the printed electrode, the solvent is completely evaporated to obtain a gas sensor.

Embodiment 2

[0046] (1) Disperse 25mg of multi-walled carbon nanotubes in 2.5mL of N,N-dimethylformamide and ultrasonically disperse them evenly, then add 0.63mg / mL of tetraaminophenylnickel porphyrin solution into In the above system, let stand for 15 hours.

[0047] (2) The product is completely separated by centrifugation, and then the crude product is washed with N,N-dimethylformamide until it is colorless, and the multi-walled carbon nanotube product functionalized with tetraaminophenylnickel porphyrin is collected and dried .

[0048] (3) The printed electrode consisting of 7 pairs of interdigitated electrodes was deposited on the paper substrate by spraying gold, and then 3 mg / mL tetraaminophenylnickel porphyrin-functionalized multi-walled carbon nanotube suspension was carefully dropped on the On the printed electrode, the solvent was completely evaporated to obtain the same gas sensor as in Example 1.

Embodiment 3

[0050] (1) Disperse 50 mg of multi-walled carbon nanotubes in 5 mL of N,N-dimethylformamide and ultrasonically disperse them evenly, then add 1.25 mg / mL of tetraaminophenylnickel porphyrin solution to the above In the system, let it stand for 30h.

[0051] (2) The product is completely separated by centrifugation, and then the crude product is washed with N,N-dimethylformamide until it is colorless, and the multi-walled carbon nanotube product functionalized with tetraaminophenylnickel porphyrin is collected and dried .

[0052] (3) The printed electrode consisting of 13 pairs of interdigitated electrodes was deposited on the paper substrate by spraying gold, and then 6.25 mg / mL tetraaminophenylnickel porphyrin functionalized multi-walled carbon nanotube suspension was carefully dropped On the printed electrodes, the solvent was completely evaporated to obtain the same gas sensor as in Example 1.

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Abstract

The invention discloses a gas sensitive sensor for detecting acetone and application thereof, and further relates to an acetone gas sensitive sensor containing the organic-inorganic composite nano material. The invention provides a process for preparing a tetraaminophenyl porphyrin functionalized multiwalled carbon nanotube composite material by an in-situ growth method, which comprises the following steps of dispersing multiwalled carbon nanotubes in an N, N-dimethylformamide solution, adding tetraaminophenyl nickel porphyrin into the solution, and standing for 24 hours, and densely filling a printing electrode composed of interdigital electrodes with the composite material to prepare the acetone gas sensor. The sensor disclosed by the invention has the advantages of high performance, mechanical flexibility, low energy consumption and room-temperature operation, has good response to acetone gas with different concentrations, is expected to be integrated to an intelligent wearable platform of a next-generation medical technology, is used for early warning and postoperative monitoring of diseases, and has a good application prospect.

Description

technical field [0001] The invention relates to an organic-inorganic composite nanometer material and a gas sensor for detecting acetone gas, and belongs to the field of organic-inorganic composite materials. Background technique [0002] With the continuous development of industry and agriculture, while the new products produced are convenient for people, more toxic and harmful substances are used and discharged to endanger people's health. Among them, acetone is a typical volatile organic compound, which is harmful to human skin, mucous membranes and nervous system. A small amount of acetone is enough to cause respiratory system and lung diseases. At the same time, acetone is also an important endogenous molecule, which is the final product of ketone body metabolism. The level of acetone concentration indicates whether the body organs are pathological or not. Therefore, the detection of acetone has attracted widespread attention. [0003] With the emergence of mobile devi...

Claims

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Application Information

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IPC IPC(8): G01N27/407
CPCG01N27/4074
Inventor 朱沛华王茜赵传锐
Owner UNIV OF JINAN
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