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Electrochemical sensor based on photoelectric coupling effect, and preparation method thereof

A photoelectric coupling and electrochemical technology, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems of low reliability, poor selectivity, photocorrosion of zinc oxide materials, etc., achieve high sensitivity and shorten service life Effect

Active Publication Date: 2018-06-22
QI DIAGNOSTICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrochemical sensor has the following problems: 1. The zinc oxide material has the problem of photocorrosion, and the stability of the electrochemical sensor will gradually decrease under light for a long time, and the reliability is not high; 2. Zinc oxide p-xylene, Trimethylbenzene, ethylbenzene and toluene have similar catalytic activities. When the mixed gas to be tested contains two or more of these gases, these gases cannot be separated and the selectivity is poor.

Method used

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  • Electrochemical sensor based on photoelectric coupling effect, and preparation method thereof
  • Electrochemical sensor based on photoelectric coupling effect, and preparation method thereof
  • Electrochemical sensor based on photoelectric coupling effect, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0042] Embodiment one: if figure 1 As shown, an electrochemical sensor based on photoelectric coupling effect, including YSZ solid electrolyte layer 1, heating sheet 2, reference electrode 3 and three sensitive electrodes, YSZ solid electrolyte layer 1 and heating sheet 2 are in the shape of a cube, and The side length of the YSZ solid electrolyte layer 1 is equal to the side length of the heating sheet 2, the lower end surface of the YSZ solid electrolyte layer 1 is attached to and fixedly connected to the upper end surface of the heating sheet 2, and the reference electrode 3 and the three sensitive electrodes are respectively large and small. In the shape of a cube with the same size, the reference electrode 3 and three sensitive electrodes are spaced on the upper end surface of the YSZ solid electrolyte layer 1, and the lower end surface of the reference electrode 3 and the lower end surfaces of the three sensitive electrodes are respectively connected to the YSZ solid elec...

Embodiment 2

[0043] Embodiment 2: This embodiment is basically the same as Embodiment 1, the only difference is:

[0044] In this embodiment, the heating chip 2 is made of aluminum oxide.

[0045] In the present embodiment, the length of the YSZ solid electrolyte layer 1 is 1 cm, the width of the YSZ solid electrolyte layer 1 is dcm, the thickness of the YSZ solid electrolyte layer 1 is hmm, the length of the heating plate 2 is 1 cm, and the width of the heating plate 2 is is dcm, and the thickness of heating plate 2 is h 1 mm, the value range of l is 1.3cm~1.7cm, the value range of d is 1.3cm~1.7cm, the value range of h is 1mm-3mm, h 1 The range of values ​​is 1.1 mm to 1.5 mm, and the lengths of the reference electrode 3, the first sensitive electrode 4, the second sensitive electrode 5 and the third sensitive electrode 6 are l1 , the width of the reference electrode 3, the first sensitive electrode 4, the second sensitive electrode 5 and the third sensitive electrode 6 is d 1 , the th...

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Abstract

The invention discloses an electrochemical sensor based on a photoelectric coupling effect, and a preparation method thereof. The electrochemical sensor comprises an YSZ solid electrolyte layer, a heating sheet, a reference electrode and three sensitive electrodes, wherein the three sensitive electrodes respectively are a first sensitive electrode, a second sensitive electrode and a third sensitive electrode, the first sensitive electrode is made of zinc oxide, the second sensitive electrode is made of the mixture of zinc oxide and iron oxide, the mass of the iron oxide is 20% of the mass of the zinc oxide in the mixture, the third sensitive electrode is made of the mixture of zinc oxide and cerium oxide, the mass of the cerium oxide is 30% of the mass of the zinc oxide in the mixture, andthe reference electrode is made of manganese dioxide. According to the present invention, the electrochemical sensor is prepared by using the easily-available materials on the basis of the ensuring of no service life shortening, and has the high sensitivity; and the photoelectric coupling effects of the sensors on different gases can be adjusted by illumination so as to achieve the efficient identification on a variety of gases, such that the selectivity is strong.

Description

technical field [0001] The invention relates to an electrochemical sensor, in particular to an electrochemical sensor based on photoelectric coupling effect and a preparation method thereof. Background technique [0002] Electrochemical sensors have been widely used in areas such as air quality monitoring, reduction of exhaust emissions, and healthcare. There are many kinds of electrochemical sensors, among which, chemical sensors based on zirconia (YSZ) can keep working for 1200 hours in harsh environments such as high humidity and high temperature (≥450°C), and have received considerable attention. . [0003] At present, chemical sensors based on zirconia mainly include an electrode layer, a solid electrolyte layer, and a heating sheet arranged from top to bottom. The material of the solid electrolyte layer is zirconia, and the material of the heating sheet is alumina. The solid electrolyte layer and the heating sheet It is a cube with the same shape and size, and the so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/406
CPCG01N27/301G01N27/406G01N27/4075G01N33/0047G01N33/497G01N33/4975G01N27/4067G01N27/4074G01N27/4076
Inventor 金涵梁红秋简家文邹杰
Owner QI DIAGNOSTICS LTD
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