Pencil drawing type NO2 sensing element and production method thereof

A sensing element and fabrication method technology, applied in the direction of material resistance, etc., can solve the problems of increasing sensor response and recovery time, complex chemical synthesis process, reducing sensor sensitivity, etc., to achieve easy control of process parameters, simple process and low cost. Effect

A sensing element and fabrication method technology, applied in the direction of material resistance, etc., can solve the problems of increasing sensor response and recovery time, complex chemical synthesis process, reducing sensor sensitivity, etc., to achieve easy control of process parameters, simple process and low cost. Effect

CN104569076AInactive Publication Date: 2015-04-29SHANGHAI NORMAL UNIVERSITY
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  • Pencil drawing type NO2 sensing element and production method thereof
  • Pencil drawing type NO2 sensing element and production method thereof
  • Pencil drawing type NO2 sensing element and production method thereof

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Embodiment

[0028] A pencil-drawn NO 2 The sensing element is structured as figure 1 As shown, the comb-shaped conductive interdigitated electrodes 1, NO 2 Composed of a sensing film 2 and an insulating paper substrate 3, wherein the comb-shaped conductive interdigital electrodes 1 are printed on the insulating paper substrate 3 by methods such as gravure printing, screen printing or inkjet printing, NO 2 The sensing film 2 is drawn on the position of the comb-shaped conductive interdigital electrode 1 provided on the insulating paper substrate 3 through a pencil 4 containing graphite, and covers the upper surface of the comb-shaped conductive interdigital electrode 1. Due to mechanical friction, metal inclusions can be formed. NO 2 sensing layer. By detecting the change of film current value, the NO 2 Detection of gas concentration.

[0029] The insulating paper substrate 3 used includes weighing paper, carbon paper, coated paper, rice paper or decorative paper, and the comb-shaped co...

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Abstract

The invention relates to a pencil drawing type NO2 sensing element and a production method of the pencil drawing type NO2 sensing element. The sensing element is composed of a comb-shaped conductive interdigital electrode (1), a pencil drawing sensing layer (2) and a paper substrate (3); the advantages of the printing technology and the material of a pencil (4) are combined; the production method comprises the steps of printing the comb-shaped conductive interdigital electrode (1) on the paper substrate (3) and drying and sintering in a drying box; drawing a NO2 sensing film on the paper substrate (3) with the comb-shaped conductive interdigital electrode (1), and finally obtaining the pencil drawing type NO2 sensing element. Compared with the prior art, the production process is simple and can be operated conveniently, the technological parameters can be controlled easily, the production process is free of pollution, the sensing film material can be taken easily, the cost is low, the electrical performance is stable, and the pencil drawing type NO2 sensing element has the characteristics of miniaturization, light and thin property and low energy consumption.

Description

technical field [0001] The invention relates to the technical field of gas sensing elements, in particular to a pencil-drawing NO 2 Sensing element and method of making the same. Background technique [0002] At present, large and medium-sized cities around the world are facing the problem of vehicle exhaust pollution. Nitrogen oxides, as one of the exhaust emissions, have posed a serious threat to the environment and human health. my country's "Ambient Air Quality Standards" stipulates that NO in the atmosphere of human settlements 2 The daily average maximum allowable concentration is 0.15mg / m 3 (Third level standard). Therefore, it is urgent to develop suitable for low concentration NO 2 The sensing element for gas molecule detection meets the needs of the development of environmental detection. Preparation of a low detection limit, specific selectivity, fast response and recovery characteristics, high sensitivity NO 2 The sensing element becomes a very important ta...

Claims

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Application Information

Patent Timeline
29 Apr 2015
Publication
CN104569076A
IPC
G01N27/12
Inventors
张建坤; 黄磊