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Nanoporous Titania-Coated Alumina Membranes: Sol–Gel Synthesis and Characterisation

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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.

Keywords: DIP COATING; NANOPOROUS MATERIAL; SLIP CASTING; SOL-GEL; TITANIA MEMBRANE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2010.2575

Publication date: September 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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