Kontaktujte nás | Jazyk: čeština English
Název: | Sub PPM detection of NO2 using strontium doped bismuth ferrite nanostructures | ||||||||||
Autor: | Dmonte, David John; Bhardwaj, Aman; Wilhelm, Michael; Fischer, Thomas; Kuřitka, Ivo; Mathur, Sanjay | ||||||||||
Typ dokumentu: | Recenzovaný odborný článek (English) | ||||||||||
Zdrojový dok.: | Micromachines. 2023, vol. 14, issue 3 | ||||||||||
ISSN: | 2072-666X (Sherpa/RoMEO, JCR) | ||||||||||
Journal Impact
This chart shows the development of journal-level impact metrics in time
|
|||||||||||
DOI: | https://doi.org/10.3390/mi14030644 | ||||||||||
Abstrakt: | The present work investigates the NO2 sensing properties of acceptor-doped ferrite perovskite nanostructures. The Sr-doped BiFeO3 nanostructures were synthesized by a salt precursor-based modified pechini method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The synthesized materials were drop coated to fabricate chemoresistive gas sensors, delivering a maximum sensitivity of 5.2 towards 2 ppm NO2 at 260 degrees C. The recorded values of response and recovery time are 95 s and 280 s, respectively. The sensor based on Bi0.8Sr0.2FeO3-delta (BSFO) that was operated was shown to have a LOD (limit of detection) as low as 200 ppb. The sensor proved to be promising for repeatability and selectivity measurements, indicating that the Sr doping Bismuth ferrite could be a potentially competitive material for sensing applications. A relevant gas-sensing mechanism is also proposed based on the surface adsorption and reaction behavior of the material. | ||||||||||
Plný text: | https://www.mdpi.com/2072-666X/14/3/644 | ||||||||||
Zobrazit celý záznam |