Direct synthesis of a titania membrane on a centrifugally casted tubular ceramic support
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In-house manufactured tubular ceramic supports prepared by centrifugal casting have a smooth inside surface and are ideal for thin defect-free coatings. The aim of this study was to directly coat a thin defect-free titania membrane in the anatase crystal structure on a ceramic support. The membrane preparation was successful. By means of XRD it was confirmed that the continuous and defect-free titania top-layer (thickness = 1.5–1.6 μm) was in the anatase crystal structure. According to the gas (N2 and He) and water fluxes, as well as the alcohol retention experiments the composite membrane was characterized as a nanofiltration membrane. An average ideal selectivity of 2.64 was obtained for the gas permeation study of N2 and He.