Nanoporous Titania-Coated Alumina Membranes: Sol–Gel Synthesis and Characterisation
Abstract:In this work, nanoporous titania top layers were deposited by dip-coating process on microporous α-alumina substrates using the sol–gel process. The alumina substrates were synthesized by slip casting method using Taguchi optimising approach. The microporous substrate was then used to coat nanoporous titania layers by the sol–gel method. The thickness, pore size, structure and permeability of the membranes were characterised using SEM, XRD, STA and Hg-Porosimetry. The process conditions to achieve defect-free nanoporous titania layers with the average pore size of about 4 nm coated on the microporous alumina substrates with the average pore size of about 270 nm were determined.
Document Type: Research Article
Publication date: September 1, 2010
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