scholarly journals High Performance Mixed Potential Type NO2 Gas Sensor Based on Porous YSZ Layer Formed with Graphite Doping

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3337 ◽  
Author(s):  
Hao Hong ◽  
Jianwen Sun ◽  
Cinan Wu ◽  
Zewen Liu
Keyword(s):  
High Performance ◽  
Sol Gel ◽  
Yttria Stabilized Zirconia ◽  
Mixed Potential ◽  
Stabilized Zirconia ◽  
No2 Gas Sensor ◽  
Potential Type ◽  
Measurement Results ◽  
Good Repeatability ◽  
Sensor Measurement

High performance mixed potential type NO2 sensors using porous yttria-stabilized zirconia (YSZ) layers doped with different concentration graphite as solid electrolyte and LaFeO3 as sensing electrode were fabricated and characterized. LaFeO3 was prepared by a typical citrate sol–gel method and characterized using XRD. The surface morphology and porosity of porous YSZ layers were characterized by field emission scanning electron microscope (FESEM). The sensor doped with 3 wt% graphite shows the highest response (−76.4 mV to 80 ppm NO2) and the response is linearly dependent on the logarithm of NO2 concentration in the range of 10–200 ppm. The sensor measurement results also present good repeatability and cross-sensitivity.

High Performance Mixed-Potential Type NOx Sensor Based On Stabilized Zirconia and Oxide Electrode

2014 ◽  
Vol 262 ◽  
pp. 292-297 ◽  
Author(s):  
Geyu Lu ◽  
Quan Diao ◽  
Chenguo Yin ◽  
Shiqi Yang ◽  
Yingzhou Guan ◽  
...  
Keyword(s):  
High Performance ◽  
Mixed Potential ◽  
Oxide Electrode ◽  
Stabilized Zirconia ◽  
Potential Type ◽  
Nox Sensor

High performance mixed potential type acetone sensor based on stabilized zirconia and NiNb 2 O 6 sensing electrode

2016 ◽  
Vol 229 ◽  
pp. 200-208 ◽  
Author(s):  
Fangmeng Liu ◽  
Xue Yang ◽  
Bin Wang ◽  
Yehui Guan ◽  
Xishuang Liang ◽  
...  
Keyword(s):  
High Performance ◽  
Mixed Potential ◽  
Stabilized Zirconia ◽  
Potential Type ◽  
Acetone Sensor

NOx Sensing Performances of Mixed-Potential-Type Gas Sensor Based on Stabilized-Zirconia and La5/3Sr1/3NiO4 Sensing Electrode

2014 ◽  
Vol 602-603 ◽  
pp. 841-844 ◽  
Author(s):  
Ying Chen ◽  
Xiang Dong Li ◽  
Feng Xia ◽  
Jian Zhong Xiao
Keyword(s):  
Low Cost ◽  
Sol Gel ◽  
Mixed Potential ◽  
Stabilized Zirconia ◽  
Thermal Expansion Coefficients ◽  
Potential Type ◽  
Response And Recovery ◽  
Expansion Coefficients ◽  
No Sensor ◽  
Sensing Characteristics

Abstract. This article attempts to use a new sensing electrode material La5/3Sr1/3NiO4 for mixed-potential-type NOx sensors as they are high ionic conductivity, close thermal expansion coefficients to electrolytes (YSZ), low-cost and stable even at above 1000 °C. The nanostructured La5/3Sr1/3NiO4 was synthesized as a sensing electrode (SE) for the mixed-potential-type yttria stabilized zirconia (YSZ)-based NO sensor by a sol-gel method. The synthesized La5/3Sr1/3NiO4 powders were characterized using XRD, BET and FESEM. The sensing characteristics were examined in the temperature range of 400-700 °C. At 450 °C, the sensor exhibited the biggest response (about 20.3 mV for 1000 ppm NO). Moreover, the sensor response and recovery were generally rapid at all the temperatures. This work demonstrated that the La5/3Sr1/3NiO4 can be an effective sensing electrode candidate of mixed-potential-type NO sensors.

Effect of Yttria-Stabilized Zirconia Concentration in an Electroless Bath on Microstructure and Composition of Ni/Yttria-Stabilized Zirconia Nanocomposite

2021 ◽  
Vol 21 (11) ◽  
pp. 5592-5602
Author(s):  
Samira Almasi ◽  
Ali Mohammad Rashidi
Keyword(s):  
High Performance ◽  
Yttria Stabilized Zirconia ◽  
X Ray Diffraction ◽  
Stabilized Zirconia ◽  
Nickel Ion ◽  
Nanocomposite Particles ◽  
X Ray ◽  
Ni Content ◽  
Naoh Solution ◽  
Average Size

The effect of the yttria-stabilized zirconia (YSZ) nanoparticle loading in an electro-less bath was considered as one of the vital synthesis variables for control Ni content and microstructure of prepared nanocomposite particles, which are two crucial factors to achieving high-performance SOFC anode. Nanocomposite particles were prepared using a simple electroless method without any expensive pretreatment of sensitizing by Sn2+ ions as well as activating by Pd2+ ions that are usually used to apply nickel coating on the surface of a non-conductive substrate. The process was performed by adding YSZ nanoparticles into NaOH solution, separating them from the solution by the centrifugal method, then providing several water-based nanofluids with different concentrations of activated YSZ nanoparticles, mixing them with NiCI2 solution, followed by adding the hydrazine and then NaOH solution. X-ray diffraction and scanning electron microscopy coupled with energy dispersive X-ray analysis were used to analyze the prepared nanocomposite particles. It is observed that after adding YSZ nanoparticles into the NaOH solution, the pH of the solution varied gradually from a starting pH of 10.2 to 9. Also, by increasing the YSZ nanoparticles loading in the electroless bath from 76 mg/l to 126 mg/l, the grain size of Ni deposits, the Ni content and the average size of the prepared nanocomposite particles decreased. The electrochemical mechanism previously proposed for the nickel ion reduction was modified, and a novel analytical model was proposed for variation of the efficiency of Ni deposition with YSZ nanoparticles loading.

scholarly journals Effect of Deposition Conditions on Phase Content and Mechanical Properties of Yttria-Stabilized Zirconia Thin Films Deposited by Sol-Gel/Dip-Coating

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Francisco J. Cano ◽  
Orlando Castilleja-Escobedo ◽  
L. J. Espinoza-Pérez ◽  
Cecilia Reynosa-Martínez ◽  
Eddie Lopez-Honorato
Keyword(s):  
Heat Treatment ◽  
Wear Rate ◽  
Adhesion Strength ◽  
Surface Defects ◽  
Sol Gel ◽  
Dip Coating ◽  
Yttria Stabilized Zirconia ◽  
Cubic Phase ◽  
Phase Content ◽  
Stabilized Zirconia

The effect of yttria concentration (0-33.4 mol%), extraction rates (0.17, 0.33, 0.50, and 0.67 mm s-1), and the number of layers (up to four) on the phase content, surface defects, thickness, hardness, adhesion strength, and wear rate of yttria-stabilized zirconia coatings produced by sol-gel/dip-coating were studied for its use on thermolabile substrates. At 700°C, a metastable tetragonal phase ( t ″ ) was obtained even with 33.4 mol% yttria when heat treated for 24 hours; however, a fully cubic structure was attained by extending the heat treatment up to 48 hours as confirmed by Raman spectroscopy. Furthermore, it was necessary to use withdrawal speeds of at least 0.67 mm s-1 to produce defect-free coatings. Although the coatings were produced at low temperature, they showed 41% lower wear rate than steel and an adhesion strength of 30 MPa. Our work stresses the importance of the heat treatment history on the stabilization of the cubic phase in sol-gel YSZ coatings.

Medium-Low-Temperature NO2 Sensor Based on YSZ Solid Electrolyte and Mesoporous WO3 Sensing Electrode for Detection of Vehicle Emissions

NANO ◽  
2021 ◽  
pp. 2150083
Author(s):  
Cheng Zhang ◽  
Chuning Jiang ◽  
Xiaohong Zheng ◽  
Xin Hong
Keyword(s):  
Low Temperature ◽  
Electromotive Force ◽  
Electrochemical Impedance ◽  
Yttria Stabilized Zirconia ◽  
Mixed Potential ◽  
Stabilized Zirconia ◽  
Excellent Performance ◽  
Hard Template ◽  
No2 Sensor ◽  
Hard Template Method

A mixed potential-type NO2 sensor was fabricated using yttria-stabilized zirconia (YSZ) as the electrolyte and mesoporous WO3 as the sensing electrode for the detection of NO2 in vehicle exhausts. The mesoporous WO3 with a diameter of 7 nm was synthesized using the hard template method. The sensor showed excellent performance in the detection of 30–500[Formula: see text]ppm of NO2 at 300∘C and 500∘C. However, commercial WO3 only operate well at 500∘C. The response of the mesoporous WO3 was higher and the test temperature was lower compared to that of commercial WO3. XPS combined with NO2-TPD was used to explain the high activity of mesoporous WO3 at medium-low temperature, and the mechanism of mixed electromotive force was verified by electrochemical impedance spectroscopy. Furthermore, the sensor exhibited high NO2 selectivity in the presence of interfering gases, such as NO, CO, CO2 and NH3. Most importantly, the sensor had excellent repeatability and stability.

Mixed potential type acetone sensor using stabilized zirconia and M3V2O8 (M: Zn, Co and Ni) sensing electrode

2015 ◽  
Vol 221 ◽  
pp. 673-680 ◽  
Author(s):  
Fangmeng Liu ◽  
Yehui Guan ◽  
Ruize Sun ◽  
Xishuang Liang ◽  
Peng Sun ◽  
...  
Keyword(s):  
Mixed Potential ◽  
Stabilized Zirconia ◽  
Potential Type ◽  
Acetone Sensor
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