Abstract
The semiconductors based on lanthanum ferrite (LaFeO3) with perovskite structure have received increased attention for gas sensing, due to their stability and high gas-sensing response. However, it remains a challenge to design and fabricate LaFeO3-based gas sensors with high electrical conductivity and low prime working temperature. Based on this consideration, porous LaFeO3 hexagonal nano-sheets were prepared via thermal decomposition of La[Fe(CN)6]·5H2O, which was synthesized by a facile co-precipitation method. The LaFeO3 nano-sheets-based sensor possesses a relatively low resistance, which is 0.5 MΩ under air atmosphere at a low operating temperature of 100 °C, which means a low-power consumption. Moreover, the sensor exhibits an infrequent selectivity to n-propanol. This approach presents an effective way for the control and optimization of the rare earth perovskite nanomaterials for gas sensing.
Graphical Abstract
Gas sensor based on the fabricated porous LaFeO3 hexagonal nano-sheets presents a low resistance of 0.5 MΩ and a good sensing performance to n-propanol at a low working temperature of 100 °C.
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Acknowledgements
The authors are grateful for financial support from the National Natural Science Foundation of China (Grant No. 51602035), Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science (20180510036), the Fundamental Research Funds for the Central Universities of China (DUT22LK15).
Funding
National Natural Science Foundation of China, 51602035, Xiaofeng Wang.
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Wang, XF., Li, X., Zhang, G. et al. La[Fe(CN)6]·5H2O-derived LaFeO3 hexagonal nano-sheets as low-power n-propanol sensors. Appl. Phys. A 128, 829 (2022). https://doi.org/10.1007/s00339-022-05957-4
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DOI: https://doi.org/10.1007/s00339-022-05957-4