Enhanced gas sensing performance of perovskite YFe1−xMnxO3 by doping manganese ions. Issue 51 (17th August 2020) - Xukeer, Aerzigu
Abstract : The gas sensitive performance of perovskite YFe1− x Mn x O3 can be tailored effectively by simple manganese ion doping. Abstract : Perovskite YFe1− x Mn x O3 with a hierarchical structure were prepared by a simple hydrothermal method and used as gas sensing materials. The structure, morphology and composition of YFe1− x Mn x O3 were investigated using X-ray diffraction, transmission electron microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. The gas sensing test showed that all YFe1− x Mn x O3 perovskites with different Mn doping concentrations displayed fast response and recovery characteristics to multiple analytes as well as good stability and recoverability. With the increase of Mn doping concentration, the response of YFe1− x Mn x O3 to four kinds of target atmospheres first increases, then decreases. The sensing performance of YFe1− x Mn x O3 is best when x = 0.05. Compared with pure YFeO3, the responses of YFe0.95 Mn0.05 O3 to 1000 ppm of CH2 O, C2 H6 O, H2 O2 and 100% relative humidity were increased by 835%, 1462%, 812% and 801%, respectively. The theoretical detection limit of YFe0.95 Mn0.05 O3 for H2 O2 and CH2 O is 1.75 and 2.55 ppb, respectively. Furthermore, the possibility of buildings a sensor array based on YFe1− x Mn x O3 with different doping concentrations was evaluated by principal component analysis and radar chart analysis. It is feasible to realize the visual and discriminative detection of the target analyte by constructing sensor arrays through radar chart analysis and database construction.