Photocatalytic degradation of dairy effluent using AgTiO2 nanostructures/polyurethane nanofiber membrane

Muzafar Ahmad Kanjwal, Nasser A.M. Barakat, Ioannis S. Chronakis

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Dairy effluent (DE) is environmentally toxic and needs special attention. Photocatalytic degradation of DE was studied using novel polyurethane (PU)-based membranes. Typically, silver-titanium dioxide nanofibers (AgTiO2 NFs) and silver-titanium dioxide nanoparticles (AgTiO2 NPs) were individually incorporated in PU electrospun nanofibers to overcome the mandatory sophisticated separation of the nanocatalysts, which can create a secondary pollution, after the treatment process. These nanomembranes were characterized in SEM, TEM, XRD and UV studies. The polymeric electrospun nanofibers were smooth and continuous, with an average diameter of about 550nm, and held their nanofibrous morphology even after more than 2h of photocatalytic degradation of DE, due to the good stability of PU in the aqueous solutions, which indicates good imprisoning of the functional photocatalysts. The PU-AgTiO2 NPs and PU-AgTiO2 NFs were effective materials for degradation of DE, even after two successive cycles. PU-AgTiO2 NPs and PU-AgTiO2 NFs showed a maximum degradation of 75% and 95%, respectively after 2h. The significant enhancement of degradation in the PU-Ag-TiO2 NPs and PU-Ag-TiO2 NFs is attributed to the photoactivity of Ag-TiO2 material under visible light irradiation.
Original languageEnglish
JournalCeramics International
Volume41
Issue number8
Pages (from-to)9615-9621
Number of pages7
ISSN0272-8842
DOIs
Publication statusPublished - 2015

Keywords

  • Dairy effluent
  • Electrospinning
  • Polyurethane nanofibers
  • Silver titanium nanomaterials
  • Nanofibers
  • Nanostructures
  • Oxides
  • Photodegradation
  • Polyurethanes
  • Titanium
  • Titanium dioxide
  • Dairy effluents
  • Effective materials
  • Electrospun nanofibers
  • Photo catalytic degradation
  • Secondary pollution
  • Silver-titanium dioxide nanoparticles
  • Visible-light irradiation
  • Silver

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