Preparation and characterisation of NH3 gas sensor based on PANI/Fe-doped CeO2 nanocomposite
Chakavak Esmaeili,
Saeed Ashtiani,
Chhabilal Regmi,
Alexandr Laposa,
Jan Voves,
Jiří Kroutil,
Karel Friess,
Vojtech Povolny,
Saeid Lotfian
Affiliations
Chakavak Esmaeili
Czech Technical University in Prague, Faculty of Electrical Engineering, Technická 1902/2, 166 27, Prague 6, Czech Republic
Saeed Ashtiani
Department of Physical Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28, Prague 6, Czech Republic
Chhabilal Regmi
Department of Physical Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28, Prague 6, Czech Republic; Ralph E. Martin Department of Chemical Engineering, University of Arkansas, Fayetteville, AR, 72701, United States
Alexandr Laposa
Czech Technical University in Prague, Faculty of Electrical Engineering, Technická 1902/2, 166 27, Prague 6, Czech Republic
Jan Voves
Czech Technical University in Prague, Faculty of Electrical Engineering, Technická 1902/2, 166 27, Prague 6, Czech Republic
Jiří Kroutil
Czech Technical University in Prague, Faculty of Electrical Engineering, Technická 1902/2, 166 27, Prague 6, Czech Republic
Karel Friess
Department of Physical Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28, Prague 6, Czech Republic
Vojtech Povolny
Czech Technical University in Prague, Faculty of Electrical Engineering, Technická 1902/2, 166 27, Prague 6, Czech Republic
Saeid Lotfian
Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Glasgow, G4 0LZ, UK; Corresponding author.
PANI/Fe-doped CeO2 nanocomposite was synthesised by the in-situ process. The produced powders were characterised by XRD, XPS, FT-IR, Raman, HRTEM and SEM-EDS tests. The sensors' function was based on PANI/Fe-doped CeO2 nanocomposite with thin film deposited on top of interdigitated electrodes (IDT). NH3 detection with PANI/Fe-doped CeO2 nanocomposite sensor could be successfully performed even at room temperature (RT) and relative humidity of 45 %. Results demonstrated that PANI/Fe-doped CeO2 might be promising sensing materials for detecting the low NH3 concentration (ppm). In addition, the sensor is selective to the interfering gases, including CO, CO2 and NO2. This sensor displays acceptable repeatability and stability over time.
