Synthesis, Characterization and Performance of Ce_(0.8)La_(0.2)O_(1.9)-ATPComposite Catalyst for Phenol Catalytic Oxidation

摘要

Ce_(0.8)La_(0.2)O_(19)-attapulgite (Ce_(0.8)La_(0.2)O_(1.9)-ATP) nanocomposite materials were synthesized by co-precipitation method. The microstracture and phase composition of the as-prepared samples were characterized by X-ray diffraction (XRD), Laser Raman spectroscopy (LRS), energy-dispersive spectrometer (EDS) and transmission electron microscopy (TEM). The redox properties of samples were investigated by phenol oxidation experiment. The results indicated that La~(3+) ions incorporated into CeO_2 lattice and formed solid solution. The Ce_(0.8)La_(0.2)O_(1.9) particles with average size of about 10 nm were loaded onto the ATP and were widely dispersed. The catalytic activity was improved when La~(3+) was introduced. The catalytic property of Ce_(0.8)La_(0.2)O_(1.9)-ATP nanocomposites for phenol, was better than that of CeO_2 and CeO_2-ATP.