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Membrane Water Treatment   Volume 1, Number 3, July 2010, pages 193-206
PVDF-TiO2 coated microfiltration membranes: preparation and characterization
H.K. Shon, S. Puntsho, S. Vigneswaran, J. Kandasamy, J.B. Kim, H.J. Park and I.S. Kim

Abstract     [Buy Article]
    Organic fouling and biofouling pose a significant challenge to the membrane filtration process. Photocatalysis-membrane hybrid system is a novel idea for reducing these membranes fouling however, when TiO2 photocatalyst nanoparticles are used in suspension, catalyst recovery is not only imposes an extra step on the process but also significantly contributes to increased membrane resistance and reduced permeate flux. In this study, TiO2 photocatalyst has been immobilized by coating on the microfiltration (MF) membrane surface to minimize organic and microbial fouling. Nano-sized TiO2 was first synthesized by a sol-gel method. The synthesized TiO2 was coated on a Poly Vinyl Difluoride (PVDF) membrane (MF) surface using spray coating and dip coating techniques to obtain hybrid functional composite membrane. The characteristics of the synthesized photocatalyst and a functional composite membrane were studied using numerous instruments in terms of physical, chemical and electrical properties. In comparison to the clean PVDF membrane, the TiO2 coated MF membrane was found more effective in removing methylene blue (20%) and E-coli (99%).
Key Words
    TiO2 photocatalyst; photocatalysis; microfiltration (MF); organic fouling; biofouling.
School of Civil and Environmental Engineering, University of Technology,
Sydney (UTS), P.O. Box 123, Broadway, NSW 2007, Australia
Photo & Environmental Technology Co. Ltd., Gwangju 500-460, Korea
Center for Seawater Desalination Plants, Gwanju Institute of Science and Technology,
Gwanju, South Korea

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