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    A novel approach to formulate high flux multifunctional ultrafiltration membranes from photocatalytic titania composite precursors on multi-channel tubular substrates

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    Authors
    Manjumol, K.
    Sankar, S.
    Nair, Balagopal
    Midhun, M.
    Mohamed, P.
    Warrier, K.
    Date
    2016
    Type
    Journal Article
    
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    Citation
    Manjumol, K. and Sankar, S. and Nair, B. and Midhun, M. and Mohamed, P. and Warrier, K. 2016. A novel approach to formulate high flux multifunctional ultrafiltration membranes from photocatalytic titania composite precursors on multi-channel tubular substrates. RSC Advances. 6 (63): pp. 58813-58822.
    Source Title
    RSC Advances
    DOI
    10.1039/c6ra14117j
    School
    Nanochemistry Research Institute
    URI
    http://hdl.handle.net/20.500.11937/31906
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 The Royal Society of Chemistry.Anatase rich titanium dioxide ultrafiltration membranes with high filtration rates have been successfully developed on multi-channel tubular alumina substrates via aqueous sol-gel method from titania-alumina composite precursors containing 30 wt% alumina. The composite membrane material exhibited anatase phase stability above 800 °C and retained a BET surface area of 64 m2 g-1 even after calcination at 700 °C. Supported membranes on multi-channel substrates with an active layer thickness of 4 µm gave a water flux value of 215 L m-2 h-1 coupled with 80% rejection of Bovine Serum Albumin (BSA) with molecular weight 66 kD at 2 bar pressure. This is much higher compared to a flux of 27 L m-2 h-1 obtained for a single component titania membrane layer. The composite membrane materials showed excellent photocatalytic activity under UV irradiation such that a solution containing Methylene Blue (MB) dye showed 96% dye degradation within 2 h. Porous disc shaped substrates coated with the active titania composite layer showed methylene blue degradation of 44% under identical conditions. The present results point towards an excellent pathway for the development of multifunctional ultra-filtration membranes for water purification and also for other separation applications where separation together with photocatalysis will be of great importance.

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