Highly sensitive and low detection limit of acetone gas sensor based on porous YbFeO3 nanocrystallines

In this work, the gas sensors based on LnFeO 3 nanocrystallines with different lanthanide (Ln = Yb, Tm, and Er) are fabricated to investigate the effect of lanthanide on acetone sensing performances. The experimental results revealed that the gas sensor based on YbFeO 3 nanocrystallines exhibited the best response ability and selectivity toward acetone gas. The YbFeO 3 gas sensor exhibits rapid response/recovery characteristic (18/25 s, 10 ppm acetone), and the detection limit can reach to be 500 ppb. The enhanced gas-sensing performance of YbFeO 3 based sensor is mainly contributed to the lanthanide with low binding energy of the Ln O bond.