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The semiconductors based on lanthanum ferrite (LaFeO
3
) 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 LaFeO
3
-based gas sensors with high electrical conductivity and low prime working temperature. Based on this consideration, porous LaFeO
3
hexagonal nano-sheets were prepared via thermal decomposition of La[Fe(CN)
6
]·5H
2
O, which was synthesized by a facile co-precipitation method. The LaFeO
3
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 LaFeO
3
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.