This study considered Zn-substituted cobalt ferrite (Zn_xCo_1-xFe₂O₄ (x = 0.0–1.0) (ZCF)) thick films structural, morphological, and electrical properties; and gas sensing performance. The ZCF thick film sensor was screen printed on a glass substrate and tested for different analyte gases, including H₂, H₂S, CO₂, Cl₂, NH₃, LPG, and C₂H₅OH. We used X-ray photoelectron spectrometry to investigate composition, chemical state, iron/cobalt or zinc ratio, and cation distribution within Zn-substituted cobalt spinel ferrite tetrahedral and octahedral sites without impurities. FESEM and HR-TEM confirmed grain dimensions between 0.13 and 0.23 μm and porous, nearly spherical to flake-like morphology for the ZCF samples. Sample DC resistivity reduced with increasing temperature, confirming semiconductor nature. Thick film ZCF composition achieved highest the gas response and selectivity to 100 ppm ethanol at room temperature (30 °C). Overall results confirmed that flake-like ZCF sensors could be effective ethanol gas sensors.

논문정보

materialstoday CHEMISTRY Volume 22, December 2021, 100607

Received 6 July 2021, Revised 2 September 2021, Accepted 19 September 2021, Available online 3 November 2021, Version of Record 3 November 2021.

Authors:R.R. Powar, V.G. Parale, V.D. Phadtare, S.B. Wategaonkar, R.K. Mane, J.L. Gunjkar, D.R. Patil, P.B. Piste, H.-H. Park, D.N. Zambare

DOI : https://doi.org/10.1016/j.mtchem.2021.100607