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YSZ-based mixed-potential type NH3 sensor with Ni3V2O8 serving as sensitive electrode and preparation method of YSZ-based mixed-potential type NH3 sensor with Ni3V2O8 serving as sensitive electrode

A hybrid potential-type and sensitive electrode technology, which is applied in the direction of instruments, scientific instruments, and electrochemical variables of materials, can solve the problems of insufficient selectivity, impracticality, and low response value, and achieve good thermal stability and chemical stability. The effect of stability, high sensitivity, and simple preparation method

Active Publication Date: 2015-02-18
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of ammonia sensor is that the response value is low, the selectivity is not good enough, and it cannot meet the practical requirements

Method used

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  • YSZ-based mixed-potential type NH3 sensor with Ni3V2O8 serving as sensitive electrode and preparation method of YSZ-based mixed-potential type NH3 sensor with Ni3V2O8 serving as sensitive electrode
  • YSZ-based mixed-potential type NH3 sensor with Ni3V2O8 serving as sensitive electrode and preparation method of YSZ-based mixed-potential type NH3 sensor with Ni3V2O8 serving as sensitive electrode
  • YSZ-based mixed-potential type NH3 sensor with Ni3V2O8 serving as sensitive electrode and preparation method of YSZ-based mixed-potential type NH3 sensor with Ni3V2O8 serving as sensitive electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of Ni by Sol-Gel Method 3 V 2 o 8 material, 800°C sintered Ni 3 V 2 o 8(800℃) Fabrication of YSZ-based hybrid potential NH as sensitive electrode material 3 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 Then stick the electrode lead wire on the middle position of the reference electrode; then bake the YSZ substrate at 100°C for 1.5 hours, and then sinter the YSZ substrate at 1100°C for 1.5 hours, so as to eliminate the terpineol in the platinum paste, and finally reduce the to room temperature.

[0040] 2. Make Ni 3 V 2 o 8 Sensitive electrode: first prepare Ni by sol-gel method 3 V 2 o 8 Material. Weigh 3mmol ...

Embodiment 2

[0046] Ni sintered at 1200°C 3 V 2 o 8 material as a sensitive electrode material, making NH 3 The sensor, its manufacturing process is:

[0047] The Ni prepared by the aforementioned method 3 V 2 o 8 Sensitive electrode material Ni was obtained by sintering at 1200°C in a muffle furnace 3 V 2 o 8(1200℃) , the device manufacturing process is the same as in Example 1.

Embodiment 3

[0049] Ni sintered at 1000°C 3 V 2 o 8 material as a sensitive electrode material, making NH 3 The sensor, its manufacturing process is:

[0050] The Ni prepared by the aforementioned method 3 V 2 o 8 Sensitive electrode material Ni was obtained by sintering at 1000°C in a muffle furnace 3 V 2 o 8(1000℃) , the device manufacturing process is the same as in Example 1.

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Abstract

The invention discloses a YSZ-based mixed-potential type NH3 sensor with Ni3V2O8 serving as a sensitive electrode and a preparation method of the YSZ-based mixed-potential type NH3 sensor with the Ni3V2O8 serving as the sensitive electrode, and belongs to the technical field of gas sensors. The sensor is mainly used for detecting ammonia in automobile tail gas. The sensor consists of an Al2O3 ceramic plate with a Pt heating electrode, a YSZ substrate, a reference electrode and the sensitive electrode, wherein the reference electrode is made from strip-type Pt; the sensitive electrode is made from strip-type Ni3V2O8; the two electrodes are independent and are symmetrically prepared at two ends of the upper surface of the YSZ substrate; the lower surface of the YSZ substrate is adhered to the Al2O3 ceramic plate. YSZ serves as an ion conductive layer; the Ni3V2O8 with the high electrochemical catalysis activity is used as the sensitive electrode; the microstructure of a sensitive electrode material is changed under different calcining temperatures (800 DEG C, 1,000 DEG C and 1,200 DEG C), and the aim of high sensitivity is achieved.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a Ni 3 V 2 o 8 YSZ-based mixed potential NH for sensitive electrodes 3 The sensor and its preparation method are mainly used for the detection of automobile exhaust. Background technique [0002] With the continuous acceleration of human industrialization, a large amount of fuel resources are consumed, which in turn leads to a series of environmental pollution problems. Among them, the smog phenomenon has become increasingly serious in the past two years. One of the main causes of this pollution phenomenon is that the exhaust gas emitted by automobiles contains harmful air pollutants, especially nitrogen oxides (NO x ). With the rapid growth of car ownership, by NO x The resulting environmental problems will also become more severe and prominent. Therefore, in order to meet the more and more stringent tail gas release standards, there is an urgent need for a denitrifi...

Claims

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Application Information

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IPC IPC(8): G01N27/407G01N27/30
Inventor 卢革宇刘方猛梁喜双孙鹏
Owner JILIN UNIV
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