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Cu-BTC/polypyrrole nanowire/graphene nano composited material-based ammonia gas sensor, and preparation method thereof

A technology of nanocomposite materials and polypyrrole nanowires, which is applied in the field of ammonia sensors, can solve the problems of non-quantitative and other problems, achieve stable product performance, improve sensitivity and selectivity, and improve sensitivity

Inactive Publication Date: 2017-04-19
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, sensitive components are generally used for the detection of ammonia leakage, mostly non-quantitative detection, only simple alarm information is given, and most of them can only be detected at high temperatures. Therefore, quantitative detection of ammonia in room temperature air Ammonia content is particularly important

Method used

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  • Cu-BTC/polypyrrole nanowire/graphene nano composited material-based ammonia gas sensor, and preparation method thereof
  • Cu-BTC/polypyrrole nanowire/graphene nano composited material-based ammonia gas sensor, and preparation method thereof
  • Cu-BTC/polypyrrole nanowire/graphene nano composited material-based ammonia gas sensor, and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Preparation of ammonia gas sensor based on Cu-BTC / polypyrrole nanowire / graphene nanocomposite:

[0030] (1) Add 0.1 mol / L pyrrole, 0.1 mol / L cetyltrimethylammonium bromide, 0.1 mol / L citric acid and excess deionized water to the flask, and stir on a magnetic stirrer 3 hours;

[0031] (2) Step (1) Slowly add 20 mL of 0.5 mol / L ammonium persulfate solution into the mixture with a burette, continue stirring for 4 hours, filter, wash, and dry at 60°C;

[0032] (3) Add 0.5 g of the prepared polypyrrole nanowire / graphene composite into a solution containing 0.1 mol / L trimesic acid, 0.1 mol / L copper nitrate, 20 mL DMF, 12 mL ethanol and 8 mL water for ultrasonic dispersion 1h;

[0033] (4) Transfer the solution in step (3) to the reaction kettle, cover it, and place it in an oven at 80°C for 24 hours, filter, wash, and dry to obtain Cu-BTC / polypyrrole nanowires / graphene nanocomposites , and then load it on the ITO conductive glass;

[0034] (5) Paste two conductive copper ...

Embodiment 2

[0040] Preparation of ammonia gas sensor based on Cu-BTC / polypyrrole nanowire / graphene nanocomposite:

[0041] (1) Add 0.2 mol / L of pyrrole, 0.15 mol / L of cetyltrimethylammonium bromide, 0.2 mol / L of citric acid and excess deionized water into the flask, and stir on a magnetic stirrer 3 hours;

[0042] (2) Step (1) Slowly add 30 mL of 0.5 mol / L ammonium persulfate solution to the mixture with a burette, continue stirring for 4 hours, filter, wash, and dry at 60°C;

[0043](3) Add 0.5 g of the prepared polypyrrole nanowire / graphene composite into a solution containing 0.1 mol / L trimesic acid, 0.2 mol / L copper nitrate, 12 mL DMF, 15 mL ethanol and 8 mL water for ultrasonication Disperse for 1h;

[0044] (4) Transfer the solution in step (3) to the reaction kettle, cover it, place it in an oven at 85°C for 24 h, filter, wash, and dry to obtain Cu-BTC / polypyrrole nanowire / graphene nanocomposite Material;

[0045] (5) Paste two conductive copper foils on the ITO conductive glas...

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Abstract

The invention discloses a Cu-BTC / polypyrrole nanowire / graphene nano composited material-based ammonia gas sensor, and a preparation method thereof. The Cu-BTC / polypyrrole nanowire / graphene nano composited material-based ammonia gas sensor comprises an ammonia gas sensor and an ammonia sensitive nano composite material; the ammonia sensitive nano composite material is a Cu-BTC / polypyrrole nanowire / graphene nano composited material, and is immobilized on ITO conductive glass; the Cu-BTC / polypyrrole nanowire / graphene nano composited material-based ammonia gas sensor can be used for quantitative detection of the concentration of ammonia gas at room temperature; operation is convenient; repeatability is high; the polypyrrole nanowire / graphene composited material possesses excellent chemical stability and an unique chemical structure; induction of synthesis of nano Cu-BTC is realized; on the other hand, Cu-BTC is capable of increasing composite material specific surface area effectively, and possesses excellent absorption effect on ammonia gas; synergistic effect of Cu-BTC with the polypyrrole nanowire / graphene composited material is realized, sensitivity and selectivity of ammonia gas detection at room temperature are increased; the preparation method is simple; application range is wide; and manufacturing cost is low.

Description

technical field [0001] The invention relates to an ammonia gas sensor, in particular to an ammonia gas sensor based on Cu-BTC / polypyrrole nanowire / graphene nanocomposite material and its preparation method and application. Background technique [0002] Ammonia (NH 3 ) is a colorless weakly alkaline gas, very soluble in water, 1 volume of water can dissolve 700 volumes of NH 3 , has a strong pungent smell and is corrosive to a certain extent. In addition, NH 3 It is also obviously irritating to the senses of the human body. This is because the ammonia gas molecule is very small and easily leaks. Moreover, the ammonia gas is colorless and has a wide range of explosion limits. It will explode when it encounters an open flame. Once an accident occurs, it will cause serious harm to human life and national property safety. Therefore, NH 3 detection is particularly important. In the existing technology, sensitive components are generally used for the detection of ammonia leaka...

Claims

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Application Information

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IPC IPC(8): G01N27/04C08K3/08C08K3/04C08K5/092C08L79/04C08G73/06
CPCC08G73/0611C08K3/04C08K3/08C08K5/092C08K2003/085C08L79/04G01N27/04G01N27/041
Inventor 邹勇进陈婷向翠丽徐芬孙立贤
Owner GUILIN UNIV OF ELECTRONIC TECH
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