Preparation and NO_2 Sensing Characteristics of LaFeO_3 Nanoparticles

LaFeO_3 nanoparticles were prepared by decomposing a precursor La[Fe(CN)_6]·4H_2O at 800℃,the precursor was synthesized by a coordination precipitation process at room temperature.The decomposing mechanism of the precursor was investigated by analyzing TG-DSC curves.Its crystal structure,particle size and ceramic microstructure were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM).Furthermore,the gas sensing properties were tested at static state.It can be shown that LaFeO_3 nanoparticles are highly crystallized after sintering at 800℃,the particle size is about 50 nm.The sensor based on LaFeO_3 nanoparticles shows remarkable sensitivity to NO_2.

LaFeO3 nanopartieles were prepared by decomposing a precursor La[Fe（CN）6]·4H20 at 800℃, the precursor was synthesized by a coordination precipitation process at room temperature. The decomposing mechanism of the precursor was investigated by analyzing TG-DSC curves. Its crystal structure, particle size and ceramic microstructure were characterized by X-ray diffraction （XRD） and transmission electron microscopy （TEM）. Furthermore, the gas sensing properties were tested at static state. It can be shown that LaFeO3 nanopartieles are highly crystallized after sintering at 800℃, the particle size is about 50 nm. The sensor based on LaFeO3 nanoparticles shows remarkable sensitivity to NO2.