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YSZ base mixed-potential type NO2 sensor based on hierarchical In2O3 sensing electrode and preparation method

A hybrid potential type, sensitive electrode technology, used in instruments, scientific instruments, analytical materials, etc., can solve the problems of low sensor response value, low sensitivity, and inability to achieve practicality, achieve high sensitivity, simple preparation method, reduce The effect of consumption

Active Publication Date: 2015-09-09
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such NO 2 The disadvantage of the sensor is that the response value is low, the sensitivity is not high enough, and it cannot meet the practical requirements.

Method used

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  • YSZ base mixed-potential type NO2 sensor based on hierarchical In2O3 sensing electrode and preparation method
  • YSZ base mixed-potential type NO2 sensor based on hierarchical In2O3 sensing electrode and preparation method
  • YSZ base mixed-potential type NO2 sensor based on hierarchical In2O3 sensing electrode and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of In by hydrothermal method 2 o 3 material, will In 2 o 3 Fabrication of YSZ-based mixed potential NO as a sensitive electrode material 2 sensor, and test the gas sensitivity performance of the sensor, the specific process is as follows:

[0039] 1. Make a Pt reference electrode: use Pt slurry to make a Pt reference electrode with a size of 0.5mm×2mm and a thickness of 15μm on one end of the upper surface of the YSZ substrate with a length and width of 2×2mm and a thickness of 0.2mm, and fold it in half with a Pt wire Finally, stick the Pt paste on the middle position of the reference electrode to lead out the electrode lead; then bake the YSZ substrate at 100°C for 1.5 hours, and then sinter the YSZ substrate at 1000°C for 1.5 hours to eliminate the terpineol in the platinum paste , and finally down to room temperature.

[0040] 2. Make In 2 o 3 Sensitive electrode: first prepare In by hydrothermal method 2 o 3 Material. 1mmol of In(NO 3 ) 3 4....

Embodiment 2

[0046] In sintered at 1200°C 2 o 3 material as a sensitive electrode material, making NO 2 The sensor, its manufacturing process is:

[0047] The In prepared by the aforementioned method 2 o 3 Sintered at 1200°C in a muffle furnace to obtain the sensitive electrode material In 2 o 3 (1200° C.), the manufacturing process of the device is the same as that of Embodiment 1, and it is marked as sensor S1200.

Embodiment 3

[0049] In sintered at 1000°C 2 o 3 material as a sensitive electrode material, making NO 2 The sensor, its manufacturing process is:

[0050] The In prepared by the aforementioned method 2 o 3 Sintered at 1000°C in a muffle furnace to obtain the sensitive electrode material In 2 o 3 (1000° C.), the manufacturing process of the device is the same as that of Embodiment 1, and it is marked as sensor S1000.

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Abstract

The invention belongs to the technical field of gas sensors, and particularly relates to a YSZ base mixed-potential type NO2 sensor based on a hierarchical In2O3 sensing electrode and a preparation method of the YSZ base mixed-potential type NO2 sensor. The sensor can be mainly applied to the detection of automobile exhaust, and sequentially comprises an Al2O3 ceramic plate with a Pt heating electrode, a YSZ baseplate, a reference electrode and a sensing electrode, wherein the reference electrode is strip Pt; the sensing electrode is strip In2O3; the reference electrode and the sensing electrode are discrete with each other and symmetrically arranged at the two ends of the upper surface of the YSZ baseplate; the lower surface of the YSZ baseplate is bonded with the Al2O3 ceramic plate with a Pt heating electrode. According to the invention, the YSZ baseplate is used as an ion conducting layer, In2O3 with high electrochemicalcatalytic activity is used as the sensing electrode, and the micro appearance of the sensing electrode material is changed through different calcination temperatures (800 DEG C to 1200 DEG C), so that the purpose of improving the sensitive property is achieved.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a sensor based on graded In 2 o 3 YSZ-Based Hybrid Potential NO at Sensitive Electrode 2 A sensor and a preparation method thereof, the sensor can be mainly used for the detection of automobile exhaust. Background technique [0002] NO 2 As a group of highly reactive reactive gases (NO x ), which mainly comes from the combustion emission process, especially the exhaust emission of road motor vehicles. A large amount of NO is emitted 2 Not only will it cause serious air pollution problems such as acid rain, greenhouse effect, and ozone layer destruction, but it will also cause serious damage to the human respiratory system. In order to effectively solve related pollution problems from the source and protect human health, develop cheap, miniature, sensitive and reliable gas sensors for monitoring and controlling NO x is an urgent need. Since the exhaust emissions of aut...

Claims

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Application Information

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IPC IPC(8): G01N27/407
Inventor 卢革宇刘方猛梁喜双孙鹏
Owner JILIN UNIV
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