Synthesis of novel RuO2/LaFeO3 porous microspheres its gas sensing performances towards triethylamine

Since triethylamine (TEA) is potentially harmful to the human body and the environment, it is necessary to create an efficient gas sensor for TEA decoration. In this work, novel catalytic RuO2 nanoparticles-functionalized LaFeO3 porous microspheres with high triethylamine-sensing performances were obtained via a simple hydrothermal method. The RuO2/LaFeO3 composites were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS). Characterization results revealed that RuO2 nanoparticles were homogeneously attached on the surface of porous LaFeO3 microshperes. Gas-sensing tests exhibit that RuO2/LaFeO3 nanocomposites show higher sensitivity, excellent selectivity and fast response and recovery towards trimethylamine (TEA). This work confirms the advantages of RuO2 catalyst-loaded in gas detection. The RuO2/LaFeO3 nanocomposites could be a promising candidate material for fast detection of trimethylamine. (C) 2019 Elsevier B.V. All rights reserved.