Photocatalytic degradation of a basic dye in water by nanostructured HPEI/TiO2 containing membranes

  • Penny Mathumba Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg 2028, South Africa
  • Khona Maziya Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, PO Box 17011, Johannesburg, 2028, South Africa
  • Alex T Kuvarega Nanotechnology and Water Sustainability Research Unit (NanoWS), College of Science, Engineering and Technology (CSET), University of South Africa (UNISA), Florida Science Campus, South Africa
  • Langelihle N Dlamini Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg 2028, South Africa
  • Soraya P Malinga Department of Chemical Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg 2028, South Africa
Keywords: hyperbranched polymers, methyl orange, phase inversion, polyethersulfone membranes, titanium dioxide nanoparticle

Abstract

A photocatalytically active membrane was synthesized through the embedding of HPEI/TiO2 nanocomposite in PES membrane for the removal of methyl orange (MO) dye from water. Membranes were characterized using scanning electron microscopy coupled with energy dispersive X-ray, atomic force microscopy, water contact angle measurements and water flux analysis.  PES/HPEI/TiO2 membranes showed improved hydrophilicity and were effective in the photodegradation of MO. The reaction rate for MO degradation was 11.6 x 10−3∙min−1, and the degradation was accompanied by the generation of sulphate ions as degradation by-products.

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Published
2020-07-28
Section
Research paper