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Preparation method of ammonia gas sensor based on polyaniline-vanadium carbide and as detection system and application of ammonia gas sensor

An ammonia gas sensor and detection system technology, which is applied to instruments, measuring devices, scientific instruments, etc., can solve the problems of inability to independently detect ammonia gas concentration information, poor detection sensitivity, large sensing resistance, etc., so as to improve portability and Integration, good responsiveness, the effect of improving the overall range

Active Publication Date: 2020-06-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the existing technology cannot realize independent detection of ammonia concentration information, the sensing resistance is large, and the detection sensitivity is poor, the present invention combines the MXene micro-nano composite material with the sensor to construct a polyaniline-vanadium carbide ammonia gas The sensor improves the response performance and reduces the sensing resistance; the present invention also combines it with a pressure-sensitive module to provide a self-powered portable ammonia alarm system, which can be expanded and applied to the field of portable ammonia detection in industry / animal husbandry

Method used

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  • Preparation method of ammonia gas sensor based on polyaniline-vanadium carbide and as detection system and application of ammonia gas sensor
  • Preparation method of ammonia gas sensor based on polyaniline-vanadium carbide and as detection system and application of ammonia gas sensor
  • Preparation method of ammonia gas sensor based on polyaniline-vanadium carbide and as detection system and application of ammonia gas sensor

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Effect test

Embodiment 1

[0048] Sensor material preparation

[0049] PANI-V 2 The fabrication process of C gas sensor is shown in Fig. 1(a). A method for preparing an ammonia sensor based on polyaniline-vanadium carbide, the surface of the gas sensor is made of polyaniline-vanadium carbide (referred to as PANI-V 2 C) Composite material, PANI-V 2 C resistance type ammonia gas sensor preparation step comprises three stages:

[0050] The first stage is achieved by placing V 2 AlC powder immersed in etching solution to make V 2 C MXene:

[0051] V 2 AlC powder is synthesized by molten salt method. V 2 The preparation method of AlC includes: 1. Weigh V, Al and C powders according to the molar ratio of 2:1.2:1, and weigh the sodium chloride NaCl powder according to the mass ratio of (2V / 1.2Al / C):NaCl=1:1; 2. Fully mix the powders in a ball mill for 12 hours; ③Put them into a tube furnace with an alumina crucible, and anneal at 1400°C for 2 hours in a flowing argon atmosphere of 99% v / v; ④Crush the ...

Embodiment 2

[0059] A detection system using the sensor obtained by the preparation method of Example 1, PANI-V 2 The C ammonia gas sensor is powered by a self-power supply device, and the obtained direct current drives the sensor, and the detection of the gas concentration is realized by measuring the electrical parameters of the sensor.

[0060] self powered device

[0061] As shown in Figure 1(b), the self-powered device includes a bottom plate 1, an E-shaped iron core 2, a fixed shaft 3, a control magnet 4, a pressing plate 5, a support rod 6, a spring 7 and a coil 8, and the coil 8 is wound on an E-shaped On the middle pole plate of the iron core 2, the upper and lower magnetic poles of NS on the left side of the control magnet 4 and the upper, middle and lower pole plates on the right side of the E-shaped iron core 2 are respectively arranged in a cross manner, and the thickness of the magnetic poles is smaller than the distance between the pole plates; E The bottom of the type iron...

Embodiment 3

[0107]In this embodiment, the application of the polyaniline-vanadium carbide-based ammonia sensor detection system obtained by the above-mentioned preparation method is to use the sensor obtained by the above-mentioned preparation method or the above-mentioned detection system to package the circuit and set it on the sole of the tooling shoe, the floor of the livestock and poultry house or the body weight In the scale, it is respectively used in the field of ammonia detection in factories, ammonia detection in livestock breeding areas, and ammonia detection in household life.

[0108] Application of self-generating shoes

[0109] The above detection system capable of alarming is applied to detecting and alarming ammonia gas in various situations. Figure 6 (a) shows two examples. The above-mentioned alarm device is integrated, packaged and installed in the sole of the tooling shoe, which can be used to alarm when the ammonia gas exceeds the standard on the production site. ...

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Abstract

The invention discloses a preparation method of an ammonia gas sensor based on polyaniline-vanadium carbide and a detection system and application of the ammonia gas sensor and belongs to the field ofsensor materials and gas detection systems. A polyaniline-vanadium carbide resistance type ammonia gas sensor is created by combining an MXene micro-nano composite material with a sensor, and the surface of the sensor adopts a PANI-V2C composite material, so that the response performance is improved, and the sensing resistance is reduced; the self-powered portable ammonia gas alarm system is alsocombined with the pressure-sensitive module, so that the self-powered portable ammonia gas alarm system can be expanded and applied to the field of industrial / animal husbandry ammonia gas carry-on detection.

Description

technical field [0001] The invention belongs to the field of sensor materials and gas detection systems, and in particular relates to a method for preparing an ammonia sensor based on polyaniline-vanadium carbide, a detection system and an application thereof. Background technique [0002] With the rapid development of modern industrialized society, environmental pollution has greatly increased. It is therefore necessary to continuously monitor and control pollution in the environment. To protect the environment and prevent harm to humans, the detection of toxic gases is becoming more and more important. Ammonia (NH 3 ) is a colorless and poisonous polluting gas that widely exists in various fields of human life and may cause explosion accidents in industrial production. In addition, it also poses a threat to human health. Even low concentrations of ammonia can have serious effects on human health, such as causing throat irritation, itchy skin, dizziness and nausea. In m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127G01N27/126
Inventor 张冬至刘虹良王志王兴伟孟维琦
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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