Titanium dioxide nanofibers integrated stainless steel filter for photocatalytic degradation of pharmaceutical compounds

Subramaniyan Ramasundaram, Ha Na Yoo, Kyung Guen Song, Jaesang Lee, Kyoung Jin Choi, Seok Won Hong

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

A photocatalytically active stainless steel filter (P-SSF) was prepared by integrating electrospun TiO2 nanofibers on SSF surface through a hot-press process where a poly(vinylidene fluoride) (PVDF) nanofibers interlayer acted as a binder. By quantifying the photocatalytic oxidation of cimetidine under ultraviolet radiation and assessing the stability of TiO2 nanofibers integrated on the P-SSF against sonication, the optimum thickness of the TiO2 and PVDF layer was found to be 29 and 42μm, respectively. At 10L/m2h flux, 40-90% of cimetidine was oxidized when the thickness of TiO2 layer increased from 10 to 29μm; however, no further increase of cimetidine oxidation was observed as its thickness increased to 84μm, maybe due to limited light penetration. At flux conditions of 10, 20, and 50L/m2h, the oxidation efficiencies for cimetidine were found to be 89, 64, and 47%, respectively. This was attributed to reduced contact time of cimetidine within the TiO2 layer. Further, the degradation efficacy of cimetidine was stably maintained for 72h at a flux of 10L/m2h and a trans-filter pressure of 0.1-0.2kPa. Overall, our results showed that it can potentially be employed in the treatment of effluents containing organic micropollutants.

Original languageEnglish
Pages (from-to)124-132
Number of pages9
JournalJournal of hazardous materials
Volume258-259
DOIs
Publication statusPublished - 2013 Aug 5

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Keywords

  • Electrospinning
  • Pharmaceutical pollutants
  • Photocatalytic filter
  • Poly(vinylidene fluoride)
  • TiO nanofibers

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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