Preparation of CeO2 novel sponge-like rods by emulsion liquid membrane system and its catalytic oxidation property

CeO2 sponge-like rods aggregated by small nanoparticles in the diameter range of 14-31 nm. with diameters of 170-810 nm and lengths of 5-10 mu m, which were successfully fabricated through a route of liquid emulsion membrane followed by heat treatment. X-ray diffraction (XRD). scanning electron microscopy (SEM). transmission electron microscope (TEM) were employed to characterize the samples. The catalysts were tested for CO oxidation. and an enhanced catalytic activity has been found for CO oxidation by Using CeO2 sponge-like rods as compared with CeO2 nanorods and nanoparticles, which showed that the morphology of CeO2 crystalline plays an important role in determining their catalytic oxidation property, (C) 2009 Elsevier B.V. All rights reserved.