TY - JOUR
T1 - Perovskite-type semiconductors for detecting ppm level of carbon dioxide
AU - Wang, Guangwei
AU - Mulmi, Suresh
AU - Chen, Hongzhen
AU - Thangadurai, Venkataraman
N1 - This work was financially supported by the National Natural Science Foundation of China (No. 41763008), Natural Science and Technology Foundation of Guizhou Provincial Department of Education (No. [2017]086), Natural Science and Technology Foundation of Guizhou Province (No. [2019]1461), Technologies R&D Program of Guizhou Province (No. [2018]2774), Doctor Foundation of Zunyi Normal University (Zunshi BS [2017]02), and the Open Funding of State Key Lab of Silicon Materials (SKL2020-05).
Wang G. thanks the University of Calgary for the Visiting Faculty employment that was funded by the China Scholarship Council. Also, V. T. thanks the Natural Sciences and Engineering Research Council of Canada (NSERC) for discovery grants (Award number: RGPIN-2016-03853), which supported this research.
PY - 2022/1
Y1 - 2022/1
N2 - Perovskite-type structured BaMg0.33Nb0.67O3 (BMN) and Co-doped BMNCs, BaMg0.33Nb0.67-xCoxO3-δ (x = 0.12, 0.17, 0.24, and 0.34), were prepared by the conventional solid-state method at 1350 °C in air. The role of Co-substitution on BMNCs was critical to achieve high chemical stability at elevated temperature since it helped make the material denser allowing higher mechanical strength and better conduction. An activation energy of 0.05 eV was calculated using the total electrical conduction in air (400–700 °C) for the sample with the highest content of cobalt, i.e., x = 0.34 member (BMNC34). The p-type semiconducting behavior of BMNC34 was seemingly active for ppm level of CO2 (0–2000 ppm). BMNC34 not only responded rapidly but also exhibited consistent current density values between the CO2 sensing tests. Considering the chemical stability, sensitivity, reproducibility, and selectivity towards CO2, BMNC34 is a promising choice for potential applications in medium-temperature (500–700 °C) gas sensing devices.
AB - Perovskite-type structured BaMg0.33Nb0.67O3 (BMN) and Co-doped BMNCs, BaMg0.33Nb0.67-xCoxO3-δ (x = 0.12, 0.17, 0.24, and 0.34), were prepared by the conventional solid-state method at 1350 °C in air. The role of Co-substitution on BMNCs was critical to achieve high chemical stability at elevated temperature since it helped make the material denser allowing higher mechanical strength and better conduction. An activation energy of 0.05 eV was calculated using the total electrical conduction in air (400–700 °C) for the sample with the highest content of cobalt, i.e., x = 0.34 member (BMNC34). The p-type semiconducting behavior of BMNC34 was seemingly active for ppm level of CO2 (0–2000 ppm). BMNC34 not only responded rapidly but also exhibited consistent current density values between the CO2 sensing tests. Considering the chemical stability, sensitivity, reproducibility, and selectivity towards CO2, BMNC34 is a promising choice for potential applications in medium-temperature (500–700 °C) gas sensing devices.
KW - BaMgNbCoO
KW - BaMgNbO
KW - Perovskite-type oxides
KW - Resistive CO sensors
U2 - 10.1007/s11581-021-04336-y
DO - 10.1007/s11581-021-04336-y
M3 - Article
AN - SCOPUS:85117709455
SN - 0947-7047
VL - 28
SP - 463
EP - 476
JO - Ionics
JF - Ionics
IS - 1
ER -