| Attributs | Valeurs |
|---|
| type
| |
| Is Part Of
| |
| Subject
| |
| Title
| - Transmission Electron Microscopy and Energy-DispersiveX-ray Spectroscopy Study of V2O5/TiO2−ZrO2 Catalyst
|
| has manifestation of work
| |
| related by
| |
| Author
| |
| Abstract
| - Transmission electron microscopy (TEM) and energy-dispersive X-ray (EDX) spectroscopy techniqueswere used to investigate the structure of a TiO2−ZrO2 binary oxide support and a V2O5/TiO2−ZrO2 catalyst.The TiO2−ZrO2 (1:1 mole ratio) was obtained by a homogeneous coprecipitation method, and the 12 wt% V2O5/TiO2−ZrO2 catalyst was prepared by a wet impregnation method. Both samples were subjectedto thermal treatments from 773 to 1073 K in order to understand the temperature stability of thesematerials. The TiO2−ZrO2 support was in an amorphous state when calcined at 773 K. However, theformation of the ZrTiO4 compound was noted at higher calcination temperatures characterized by a layerstructure with a lattice spacing of ca. 2.87 Å due to the (111) plane of this compound. The V2O5/TiO2−ZrO2catalyst when calcined at 773 K shows heterogeneity in the distribution of vanadium oxide species on thesupport surface. The TEM/EDX analysis further provides clear evidence for ZrV2O7 and TiO2 formationat 1073 K calcination in agreement with X-ray diffraction observations.
|
| article type
| |
| is part of this journal
| |
