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Polyaniline nanometer oxidate compound film micro-gas sensors array and method for making same

A nano-oxide, gas sensor technology, applied in the direction of instruments, scientific instruments, measuring devices, etc., to achieve the effect of easy recovery, fast response, and easy operation

Inactive Publication Date: 2007-09-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is how to provide a polyaniline / nano-oxide composite film micro gas sensor array, which can solve the selectivity problem of a single semiconductor or conductive polymer sensor, and has higher sensitivity and more Fast response recovery characteristics; the present invention also provides the preparation method of the array, and the preparation method is simple and easy to operate

Method used

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  • Polyaniline nanometer oxidate compound film micro-gas sensors array and method for making same
  • Polyaniline nanometer oxidate compound film micro-gas sensors array and method for making same

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Embodiment 1

[0036] Firstly, surface pretreatment is performed on the planar interdigitated electrode unit device as shown in FIG. 2 . Put the interdigitated electrode device into 1% polydiallylammonium chloride aqueous solution and soak for 10 minutes, take it out, wash it with deionized water, and then dry it with nitrogen; then immerse the substrate in 2mg / mL poly( Sodium styrene sulfonate) solution for 10 minutes, then washed with deionized water and dried.

[0037] Take 0.2 mL of TiO with a pipette 2 Nano sol, add deionized water to dilute to 0.1wt%; ultrasonic 15min. Weigh 0.1254g of ammonium persulfate and dissolve it in 10mL of 2 mol / L hydrochloric acid. At a temperature of 10°C, the sonicated TiO 2 The sol was added to 20 mL of 2.0 mol / L hydrochloric acid solution, and then 0.1 mL of aniline monomer was added thereto. Finally, the hydrochloric acid solution of ammonium persulfate was slowly dropped into the mixed solution, and the color of the system gradually deepened from li...

Embodiment 2

[0039] Firstly, surface pretreatment is performed on the planar interdigitated electrode unit device as shown in FIG. 2 . Put the interdigitated electrode device into 1% polydiallylammonium chloride aqueous solution and soak for 10 minutes, take it out, wash it with deionized water, and then dry it with nitrogen; then immerse the substrate in 2mg / mL poly( Sodium styrene sulfonate) solution for 10 minutes, then washed with deionized water and dried.

[0040] Dissolve 0.1 g of sodium dodecylbenzenesulfonate in 20 mL of 0.2 mol / L hydrochloric acid solution, stir well and add 0.144 g of SnO 2 Nano-powder, and stir with a magnetic stirrer at high speed for 20 minutes, and the dispersion system is milky white at this time; then put it into an ultrasonic cleaning machine for ultrasonic oscillation for 30 minutes. Weigh 0.1254g of ammonium persulfate and dissolve it in 10mL of 2mol / L hydrochloric acid. At 10 °C, add 0.1 mL of aniline monomer to the sonicated SnO 2 In the sol, final...

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Abstract

This invention discloses one polyaniline or nanometer oxidation compound film gas sensor array, which comprises more than two compound film micro gas sensor unit integrated into one same base. The invention is characterized by the following: the said compound micro gas sensor unit comprises base slice, cross electrode, the compound film and conductive wires; the compound film has aniline single part, mixture acid liquid, oxidation acid and disperse agent and inorganic oxidation gel or powder.

Description

technical field [0001] The invention relates to the field of organic-inorganic nanocomposite gas sensors, in particular to a polyaniline / nano oxide composite film micro gas sensor array and a preparation method thereof. Background technique [0002] Gas sensors have important application prospects in environmental detection, chemical gas detection and food industry, so it is imperative to develop high-performance sensors with high sensitivity, high selectivity and good stability. All of these put forward new and higher requirements for the core of the gas sensor - the gas sensitive material. A single inorganic semiconductor material or conductive polymer gas-sensing material has disadvantages such as slow response, poor selectivity, low sensitivity, and poor stability. Compounding organic-inorganic gas-sensing materials in different ways is an effective way to solve these problems. Since organic / inorganic nanocomposites can not only exert the characteristics of inorganic na...

Claims

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Application Information

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IPC IPC(8): G01N27/12G01N27/00
Inventor 蒋亚东太惠玲谢光忠杜晓松
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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