YSZ (yttria stabilized zirconia) blended potentiometric NH3 sensor with SnO2 as sensitive electrode and production method of YSZ blended potentiometric NH3 sensor

A hybrid potential-type, sensitive electrode technology, applied in instruments, scientific instruments, material analysis through electromagnetic means, etc., can solve the problems of low response value, impracticality, and insufficient selectivity, etc., and achieve low production cost, The preparation method is simple and easy, and the effect of good thermal stability and chemical stability

Active Publication Date: 2016-11-09
JILIN UNIV
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  • Claims
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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 (yttria stabilized zirconia) blended potentiometric NH3 sensor with SnO2 as sensitive electrode and production method of YSZ blended potentiometric NH3 sensor
  • YSZ (yttria stabilized zirconia) blended potentiometric NH3 sensor with SnO2 as sensitive electrode and production method of YSZ blended potentiometric NH3 sensor
  • YSZ (yttria stabilized zirconia) blended potentiometric NH3 sensor with SnO2 as sensitive electrode and production method of YSZ blended potentiometric NH3 sensor

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Embodiment 1

[0038] A YSZ substrate with a nanobowl-shaped array structure on the surface was prepared using the polystyrene microsphere template method, and a gold layer was evaporated on one side of the substrate, and sintered at 1100°C for 3 hours. A gold particle with a diameter of about 600nm is formed in the structure, and the SnO 2 Preparation of YSZ-based mixed potential NH for sensitive electrode materials 3 sensor and test its performance. The specific implementation process is as follows:

[0039] 1. Make a YSZ substrate with a nanobowl-shaped array structure on the surface: prepare ethanol, deionized water, polystyrene microspheres (the diameter of the microspheres is 1 μm) = 1mL: 1mL: 1g into a suspension, and the suspension The turbid solution was poured into 100 mL deionized water containing 35 μL surfactant (aqueous solution of 1% sodium dodecyl sulfate) along the glass slide, and allowed to stand for 1 hour to form a neat arrangement at the deionized water / air interface....

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Abstract

The invention discloses an YSZ (yttria stabilized zirconia) blended potentiometric NH3 sensor with SnO2 as a sensitive electrode and a production method of the YSZ blended potentiometric NH3 sensor, and belongs to the technical field of gas sensors. The YSZ blended potentiometric NH3 sensor comprises an Al2O3 ceramic plate with a Pt heating electrode, a YSZ base plate, a Pt reference electrode with a strip structure, and the SnO2 sensitive electrode sequentially. A gold nanoparticle array structure is constructed in partial region of the upper surface of the YSZ base plate, and the SnO2 sensitive electrode is produced on the array structure. The Pt reference electrode is produced on the region, without the gold nanoparticle array structure, of the upper surface of the YSZ base plate. The lower surface of the YSZ base plate is bonded with the Al2O3 ceramic plate with the Pt heating electrode. YSZ serves as an ion conducting layer, the SnO2 with high electrochemistry catalytic activity serves as the sensitive electrode and is applied to the gold nanoparticle array structure, and the objective of improving sensitivity is achieved through introduction of the gold nanoparticle array structure.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a YSZ substrate with a gold nanoparticle array structure on the surface and a SnO 2 YSZ-based mixed potential NH as sensitive electrode material 3 The sensor and its preparation method are mainly used in the detection of automobile exhaust. Background technique [0002] With the continuous increase of the number of cars in the world, the problem of air pollution caused by vehicle exhaust emissions is becoming more and more significant. Countries around the world have formulated strict exhaust emission standards to limit NO in vehicle exhaust. x emissions. In order to meet the requirements, denitrification treatment must be carried out in the process of vehicle exhaust emission. Using Urea as a Selective Catalytic Reductant in Engine Aftertreatment Systems to Reduce NO x Emissions are considered to be the most effective method. In this system, urea solution is injected i...

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor卢革宇王斌梁喜双孙鹏刘凤敏孙彦峰高原揣晓红马健王庆凤
OwnerJILIN UNIV