Unlock instant, AI-driven research and patent intelligence for your innovation.

Carbon nano tube thin film three-electrode hydrogen sensor and concentration measuring method by utilizing same

A carbon nanotube film and three-electrode technology, which is applied in the field of gas sensing, can solve the problems of low sensitivity, large discharge voltage and discharge current, and no concentration measurement, and achieve the effect of accurate measurement and high sensitivity

Inactive Publication Date: 2011-06-15
XI AN JIAOTONG UNIV
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sensor has a nonlinear relationship between the breakdown voltage and the gas concentration, and the linear error between the breakdown discharge current and the gas concentration is large; the discharge voltage and discharge current are large; the carbon nanotube film anode cannot measure a single gas
Professor Hui Guohua and Professor Chen Yuquan from the School of Biomedical Engineering and Instrument Science of Zhejiang University developed a carbon nanotube film cathode two-electrode gas sensor under the condition of 120 micron electrode spacing, and studied the discharge characteristics of the sensor in three single gases , due to low sensitivity, does not constitute a gas sensor for measuring concentration

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Carbon nano tube thin film three-electrode hydrogen sensor and concentration measuring method by utilizing same
  • Carbon nano tube thin film three-electrode hydrogen sensor and concentration measuring method by utilizing same
  • Carbon nano tube thin film three-electrode hydrogen sensor and concentration measuring method by utilizing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as Figure 4 , Figure 5 As shown, the carbon nanotube thin film three-electrode hydrogen sensor consists of three electrodes stacked one after another from top to bottom, and the three stacked electrodes are respectively provided with a first electrode 1, a second electrode 2 and a third electrode 3. The first electrode 1 is composed of a substrate 5 with a carbon nanotube film 6 distributed on the inner surface and an electrode 4 with air holes; the second electrode 2 is composed of a lead-out electrode plate with a lead-out hole in the center ; The third electrode 3 is composed of collectors with blind holes on the electrode plate surface; the three electrodes are separated from each other by insulating pillars 7 .

[0038] Figure 4 In the shown embodiment of the carbon nanotube film three-electrode hydrogen sensor, there are two vent holes on the electrode surface of the first electrode 1, and the vent holes are circular; a carbon nanotube film is bonded to ...

Embodiment 2

[0046] The basic structure of this embodiment is the same as that of Embodiment 1, the difference is that the electrode spacing between two adjacent electrodes in the three electrodes of the carbon nanotube film three-electrode hydrogen sensor is 250 μm and 30 μm respectively, and the first electrode 1 and the second electrode 2 polar plates facing area is 0.01mm 2 , the area of ​​the plate facing the second electrode 2 and the third electrode 3 is 0.01mm 2 .

[0047] There is one vent hole on the electrode surface of the first electrode 1, and the vent hole is quadrilateral, pentagonal or hexagonal; the second electrode 2 has 4 center lead-out holes, and the lead-out holes are quadrilateral, pentagonal or hexagonal ; The number of blind holes in the third electrode 3 is 4, and the blind holes are 3-6 prisms or pyramids.

[0048] The detection method of the present embodiment is basically the same as embodiment 1, the difference is:

[0049] The cathode voltage of the first...

Embodiment 3

[0051] The basic structure of this embodiment is the same as that of Embodiment 1, the difference is that the electrode spacing between two adjacent electrodes in the three electrodes of the carbon nanotube film three-electrode hydrogen sensor is 250 μm and 30 μm respectively, and the first electrode 1 and the second electrode 2 polar plates facing area is 10mm 2 , the area of ​​the plates facing the second electrode 2 and the third electrode 3 is 100mm 2 .

[0052] There are 4 vent holes on the electrode surface of the first electrode 1, and the vent holes are quadrilateral, pentagonal or hexagonal; the second electrode 2 has 2 central lead-out holes, and the lead-out holes are quadrilateral, pentagonal or hexagonal ; The number of blind holes in the third electrode 3 is 2, and the blind holes are 3-6 prisms or pyramids.

[0053] The detection method of the present embodiment is basically the same as embodiment 1, the difference is:

[0054] The cathode voltage of the firs...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a carbon nano tube thin film three electrode hydrogen sensor and a concentration measuring method by utilizing the same. The hydrogen sensor comprises a first electrode, a second electrode and a three electrode which are sequentially distributed, wherein the first electrode is provided with an air hole, the inner surface of the air hole is adhered with a substrate distributed with a carbon nano tube thin film; the second electrode is provided with an outlet hole at the center; the board of the third electrode is provided with a blind hole; and the three electrodes are mutually isolated. The method comprises the following steps of: 1) placing a hydrogen sensor, a temperature sensor and a humidity sensor with different interelectrode distances in the invention into hydrogen to be detected; 2) applying a voltage on each electrode; 3) measuring the ion flow value of each sensor; 4) forming a sample according to the measured values as well as calibration values of hydrogen concentration, temperature and humidity, and constructing a hydrogen concentration measuring database by combining an insertion sample; 5) constructing a data diffusion instrument, and building a hydrogen concentration measuring model; and 6) inputting the values measured by the sensors into the measuring model to obtain an accurate measurement value of the hydrogen concentration. When thenovel hydrogen sensor is applied to hydrogen detection, the sensitivity is high, the linearity is good, and the accuracy is high.

Description

technical field [0001] The invention relates to the field of gas sensing, in particular to a three-electrode hydrogen sensor based on carbon nanotube film and gas discharge principle and a method for measuring hydrogen concentration. Background technique [0002] With the urgent need of gas measurement in all walks of life and the development of nanotechnology, nanosensors have made great progress. Especially with the discovery of carbon nanotubes at the end of the 20th century, carbon nanotubes have shown attractive application prospects in the fields of gas, temperature and humidity measurement. The carbon nanotube film two-electrode sensor among carbon nanotube gas, temperature and humidity sensors has become a research hotspot in the field of gas, temperature and humidity measurement due to its advantages of high measurement sensitivity, wide gas range and fast response. Carbon nanotube film two-electrode gas sensor is based on the principle of gas discharge, which over...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/64G01K7/40
Inventor 张勇王进宋晓慧姜为华张晶园方静王影花张建业牛国平王晓冰李昕唐建文刘君华
Owner XI AN JIAOTONG UNIV