Sensing properties of amperometric ppb-level NO2 sensor based on sodium ion conductor with sensing electrodes comprising different WO3 nanostructures
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In this study, amperometric NO2 sensors based on Na+ superionic conductor electrolyte and sensing electrodes with different WO3 nanostructures (WO3 nanoparticles, WO3 nanosheets, and mesoporous WO3) have been fabricated and compared. Sensing properties, such as optimum test temperature, sensitivity, repeatability, and selectivity have been determined and compared. Compared with the literatures, the sensors, prepared using three different WO3 nanostructures, all showed improved sensing properties to 100–1000 ppb NO2 at low work temperatures of 100–150 °C. Among above sensors, the sensor equipped with mesoporous WO3 sensing electrode exhibited the best amperometric sensitivity characteristics and the minimum test temperature. The relationship between the sensing properties and the mesoporous structure has also been discussed. What’s more, the sensor can test ppb-level NO2 in low temperature, which makes it possible to monitor low concentrations of NO2 in the air.
Na+ superionic conductor
Transmission electron microscopy
Brunauer, Emmett and Teller
Atomic Force Microscope
Dynamic light scattering particle size analysis
This work is supported by Foundation of Science and Technology Commission of Shanghai Municipality (No. 18090503600) and Research project of Shanghai university of applied technology (XTCX2017-4).
Compliance with ethical standards
Conflict of interest
This manuscript has not been published or presented elsewhere in part or in entirety and is not under consideration by another journal. We have read and understood your journal’s policies, and we believe that neither the manuscript nor the study violates any of these. There are no conflict of interest to declare.
- 4.U. S. Environmental Protection Agency (2017) Air trends summary report. https://www.epa.gov/air-trends
- 13.Leonard J, Reyes N, Allen KM, Randhir K, Li L, AuYeung N et al (2015) Effects of dopant metal variation and material synthesis method on the material properties of mixed metal ferrites in Yttria stabilized zirconia for solar thermochemical fuel production. Int J Photoenergy 2015:1–10CrossRefGoogle Scholar