Construction of LaFe1-xMnxO3/attapulgite nanocomposite for photo-SCR of NOx at low temperature

LaFe1-x MnxO3/attapulgite (ATP) nanocomposite was prepared by a sol-gel method. The structures and physicochemical properties were investigated by X-ray diffraction (XRD), Transmission electron microscope (TEM), UV-visible diffused reflectance spectroscopy (UV-vis) and X-ray photoelectron spectroscopy (XPS). LaFe1-xMnxO3/ATP nanocomposite was used as catalyst for photo-assisted selective catalytic reduction (photo-SCR) of NO under visible light irradiation. The impact of the various Mn doping fraction on the NO conversion was investigated. Results indicate that LaFe1-xMnxO3 remains as a perovskite solid solution supported uniformly on the ATP surface when x is less than 0.4. When x is beyond 0.4, LaMnO3 phase co-precipitates with the perovskite LaFe0.6Mn0.4O3 and forms coherent heterojunction of LaMnO3/LaFe(0.6)Mno(0.4)O(3) on ATP. The photocatalytic deNO(x) activity of the composite material is the highest when x = 0.6 and the NO conversion reaches as high as 85% even under room temperature. (C) 2017 Elsevier B.V. All rights reserved.