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Preparation method of metalloporphyrin/carbon nano-tube paper flexible gas sensor

A carbon nanotube paper and gas sensor technology, applied in the direction of material resistance, etc., can solve the problem of low sensitivity, achieve the effect of improving sensitivity, simple and novel preparation method, and low cost

Inactive Publication Date: 2019-06-14
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure carbon materials are less sensitive to gases, so they are often compounded with other materials to increase active sites and improve sensitivity

Method used

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  • Preparation method of metalloporphyrin/carbon nano-tube paper flexible gas sensor
  • Preparation method of metalloporphyrin/carbon nano-tube paper flexible gas sensor
  • Preparation method of metalloporphyrin/carbon nano-tube paper flexible gas sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Take an appropriate amount of tetrakis (4-sulfonate) phenyl porphyrin (tpps 4 ) And cobalt acetate are dissolved in methanol, then heated to 70°C, after reacting for 10 hours, cooled to room temperature. Suction filtration, wash the filter cake with anhydrous methanol, collect the filtrate, use recrystallization and other methods for purification, and dry to obtain cobalt tetra (4-sulfonate) phenyl porphyrin (Co-tpps4).

[0038] (2) Take 0.3g of carbon nanotubes (CNTs) and 0.01g of Co-tpps 4 Ultrasonic dispersion in 30ml ionized water to obtain Co-tpps 4 / CNTs dispersion: Add 2g of paper fiber into 70ml of deionized water, and use high-speed shear to disperse for 12h to obtain a uniform pulp. Co-tpps 4 / CNTs dispersion is mixed with paper pulp, after high-speed shearing and mixing, vacuum filtration, the resulting filter cake is rolled at a pressure of 60MPa and a temperature of 80°C for 6h to obtain Co-tpps 4 / CNTs paper flexible gas sensor.

[0039] Co-tpps that will b...

Embodiment 2

[0042] (1) Take an appropriate amount of tetrakis (4-sulfonate phenyl) porphyrin (tpps 4 ) And zinc acetate dissolved in methanol, then heated to 85°C, reacted for 5 hours, and then cooled to room temperature. Suction filtration, wash the filter cake with anhydrous methanol, collect the filtrate, use recrystallization and other methods to purify, and dry to obtain zinc tetrakis (4-sodium sulfonate phenyl) porphyrin (Zn-tpps 4 ).

[0043] (2) Take 0.15g carbon nanotubes (CNTs) and 0.01g Zn-tpps 4 Ultrasonic dispersion in 40ml ionized water to obtain Zn-tpps 4 / CNTs dispersion: Add 1g of paper fiber to 60ml of deionized water and disperse for 6h by high-speed shearing to obtain a uniform pulp. Zn-tpps 4 / CNTs dispersion is mixed with paper pulp, after high-speed shearing and mixing, vacuum filtration, the resulting filter cake is rolled at 40MPa pressure and 60℃ temperature for 12h, then Zn-tpps is obtained 4 / CNTs paper flexible gas sensor.

[0044] The prepared Zn-tpps 4 / CNT paper...

Embodiment 3

[0047] (1) Take an appropriate amount of tetrakis (4-sulfonate phenyl) porphyrin (tpps 4 ) And ferric acetate are dissolved in methanol, then heated to 100°C, after reaction for 2h, cooled to room temperature. Suction filtration, washing the filter cake with anhydrous methanol, collecting the filtrate, purifying by means of recrystallization, etc., and drying to obtain iron tetrakis (4-sodium sulfonate phenyl) porphyrin (Fe-tpps4).

[0048] (2) Take 0.05g carbon nanotubes (CNTs) and 0.01g Fe-tpps 4 Ultrasonic dispersion in 50ml ionized water to obtain Fe-tpps 4 / CNTs dispersion: Add 0.5g of paper fiber to 50ml of deionized water, and use high-speed shear to disperse for 2h to obtain a uniform pulp. Fe-tpps 4 / CNTs dispersion is mixed with paper pulp, high-speed shearing and mixing are uniform, vacuum filtration, and the resulting filter cake is pressed and rolled at a pressure of 20MPa and a temperature of 40°C for 24h to obtain Fe-tpps 4 / CNTs paper flexible gas sensor.

[0049] F...

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Abstract

The invention provides a preparation method of metalloporphyrin / carbon nano-tube paper flexible gas sensor. The method comprises the following steps: firstly preparing metal tetra(4-sodium sulfate phenyl) porphyrin, and then uniformly mixing with the carbon nano-tube to prepare a metalloporphyrin / carbon nano-tube dispersion solution; and then uniformly mixing paper pulp obtained after shearing anddispersing paper fiber at high speed with the metalloporphyrin / carbon nano-tube dispersion solution; rolling an acquired filter cake at a certain temperature and pressure by adopting a vacuum suctionfiltration method, thereby preparing the metalloporphyrin / carbon nano-tube paper flexible gas sensor. The preparation method provided by the invention has the advantages that the preparation method is simple, the cost is low, the sensor can be regulated and controlled by controlling the metal variety in the porphyrin, thereby acquiring a flexible gas sensor with specific response for different gases.

Description

Technical field [0001] The invention belongs to the field of gas sensors, and specifically relates to a preparation method of a metal porphyrin / carbon nanotube paper flexible gas sensor. Background technique [0002] Since entering the 21st century, with the continuous advancement of technology, carbon materials and their derivatives have been widely used in various fields. In the field of gas sensing materials, carbon materials have the advantages of high mechanical strength, good thermal stability, good electrical conductivity, good electron mobility at room temperature, low detection noise, and large specific surface area. Received widespread attention. Currently, commonly used carbon gas sensing materials can be divided into two categories: two-dimensional (2D) graphene and its derivatives and one-dimensional (1D) carbon nanotubes and its derivatives. [0003] As a gas sensing material, carbon materials mainly use the contact with reducing gas to cause resistance changes to r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
Inventor 黎厚斌陈良哲蔡少勇刘兴海张婕妤
Owner WUHAN UNIV
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