Preparation and Characterization of Nanostructure Titania Colloidal Membranes

In this investigation a nanostructure titania membrane on an alumina support was prepared. The support was made via a single axis press. The titania colloidal sol was then prepared. To have a crack-free titania membrane، PVA and HPC additives were included in the sol in specific amounts. The support was dipped in the sol and the layer was dried and calcined in a proper manner. The average particle size of the titania sol was measured to be 55. 6 nm. X-ray diffraction technique was utilized to determine the titania phase transformation temperature. The burn out temperature of the volatile materials and the organic additives were determined via the TGA technique. Utilizing the XRD and TGA techniques the optimum calcinations temperature was determined to be 450˚C. Microstructure and the presence of any possible crack or defect were examined using Scanning Electron Microscopy. The final product was a crack-free titania membrane with no defect. Therefore، it can be concluded that the membrane preparation procedure is optimum.