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Three-phase interface YSZ-based mixed potential NO2 gas sensor with nano bowl-shaped array structure and preparation method of three-phase interface YSZ-based mixed potential NO2 gas sensor

A hybrid potential type, gas sensor technology, used in nanotechnology, instruments, scientific instruments, etc., can solve the problems of uncontrollable surface morphology, achieve good thermal stability and chemical stability, low cost, and firm bowl-shaped structure. Effect

Active Publication Date: 2016-06-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many methods such as sandblasting and HF corrosion have been tried to change the morphology of the YSZ substrate, although it can improve the NO 2 response value, but the resulting surface morphology is not controllable

Method used

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  • Three-phase interface YSZ-based mixed potential NO2 gas sensor with nano bowl-shaped array structure and preparation method of three-phase interface YSZ-based mixed potential NO2 gas sensor
  • Three-phase interface YSZ-based mixed potential NO2 gas sensor with nano bowl-shaped array structure and preparation method of three-phase interface YSZ-based mixed potential NO2 gas sensor
  • Three-phase interface YSZ-based mixed potential NO2 gas sensor with nano bowl-shaped array structure and preparation method of three-phase interface YSZ-based mixed potential NO2 gas sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The concentration of zirconium ions in the immersion salt solution is 0.01mol / L, and the concentration of yttrium ions is 0.00175mol / L, corresponding to the structure of a nano-bowl array on the surface of the YSZ substrate, which is used as a solid electrolyte layer to build a high-efficiency three YSZ-based sensors at the phase interface.

[0074] Prepare a YSZ substrate with a nanobowl-shaped array structure, the specific process is as follows:

[0075] First, inject PS microsphere suspension (diameter 1000nm, PS microsphere: ethanol: deionized water = 0.1g: 1mL: 1mL) into deionized water containing surfactant (using sodium lauryl sulfate As a surfactant (SDS), SDS: H 2 O=35μL: 100mL), the PS microspheres form a relatively neat monolayer PS microspheres on the surface of the water due to the effect of surface tension, and the PS microspheres are transferred to the saline solution using the cleaned silicon wafer for solution impregnation (ZrO (NO 3 ) 2 : Y(NO 3 )...

Embodiment 2

[0078] The concentration of zirconium ions in the immersion salt solution is 0.02mol / L, and the concentration of yttrium ions is 0.0035mol / L. Correspondingly, a nano-bowl-shaped array structure is constructed on the surface of the YSZ substrate, and this is used as a solid electrolyte layer, thereby constructing a high-efficiency Fabrication process of the YSZ-based sensor at the three-phase interface.

[0079] The production process is to change the impregnation concentration of the solution in Example 1 to 0.02 mol / L of zirconium ions and 0.0035 mol / L of yttrium ions, and the rest of the process is the same as in Example 1.

Embodiment 3

[0081] The concentration of zirconium ions in the immersion salt solution is 0.05mol / L, and the concentration of yttrium ions is 0.00875mol / L, corresponding to the structure of a nano-bowl array on the surface of the YSZ substrate, which is used as a solid electrolyte layer, and then builds a high-efficiency Fabrication process of the YSZ-based sensor at the three-phase interface.

[0082] The production process is to change the impregnation concentration of the solution in Example 1 to 0.05 mol / L of zirconium ions and 0.00875 mol / L of yttrium ions, and the rest of the process is the same as in Example 1.

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Abstract

The invention belongs to the technical field of gas sensors and in particular relates to a mixed potential NO2 gas sensor which is produced by taking a PS microsphere as a template, immersing with a solution containing zirconium and yttrium ions and sintering to prepare a nano bowl-shaped array structure on the surface of a YSZ base plate, and taking the YSZ base plate as a base plate. The sensor provided by the invention is mainly used for detecting automobile exhaust. The mixed potential NO2 gas sensor is composed of an Al2O3 ceramic plate with a Pt heating electrode, the YSZ base plate, a Pt reference electrode and a sensitive electrode in sequence; the upper surface of the YSZ base plate is the nano bowl-shaped array structure composed of yttrium-stabilized zirconia. According to the mixed potential NO2 gas sensor provided by the invention, the YSZ base plate with the nano bowl-shaped array structure constructed is prepared by a PS microsphere template method and is used as electrolyte; the contact of gas to be detected and the electrolyte is improved by the nano bowl-shaped array structure on the surface so that reaction active sites are increased and the aim of improving the sensitivity of the sensor is realized; furthermore, the nano bowl-shaped array structure has hydrophobic characteristics, so that the moisture resistance of the sensor is greatly improved. The mixed potential NO2 gas sensor is shown as a figure 1.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, and specifically relates to using PS microspheres as a template to prepare a nanobowl-shaped array structure on the surface of a YSZ substrate after impregnating and sintering a solution containing zirconium and yttrium ions, and using it as a substrate to make a mixed potential type NO 2 Gas sensor, which is mainly used for the monitoring of automobile exhaust. Background technique [0002] With the continuous development of the world economy and the continuous increase of car ownership, the environmental problems caused by the large amount of vehicle exhaust emissions have become increasingly prominent, seriously threatening people's health. In order to prevent further deterioration of the environment, countries around the world have formulated more stringent vehicle exhaust emission restrictions. In order to improve fuel combustion efficiency and control carbon dioxide emissions, it is o...

Claims

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Application Information

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IPC IPC(8): G01N27/407B82Y40/00
CPCB82Y40/00G01N27/407
Inventor 卢革宇王斌梁喜双刘方猛刘凤敏孙鹏马健
Owner JILIN UNIV
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