This article reports on titanium dioxide (TiO2)-coated nanofibers deposited on a filter surface by the electrospinning process. After depositing a micrometer-thick film of polyamide 11 nanofibers on polypropylene fabric, TiO2 nanoparticles can be directly electrosprayed onto the nanofibers. X-ray diffraction and Raman spectroscopy showed minimal change in the phase composition (anatase and rutile) and no change in the particle size of nanocrystalline TiO2 after coating. Scanning electron microscopy demonstrated that nanofibers were uniformly coated by titanium dioxide nanoparticles without agglomeration. TiO2-coated filters showed excellent photocatalytic-bactericidal activity and photo-induced hydrophilicity.
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This work was supported in part by Amerinova LLC, USA, and Drexel University College of Medicine. The authors are grateful to Lou Schiliro (Amerinova) for helpful discussions and to Arkema, Inc. for providing PA 11. M.E.K. was supported by ArtCraft Glass, Inc., Kutahya, Turkey. K. B. was supported by the NSF Graduate Student Research Fellowship.
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Lee, BY., Behler, K., Kurtoglu, M.E. et al. Titanium dioxide-coated nanofibers for advanced filters. J Nanopart Res 12, 2511–2519 (2010). https://doi.org/10.1007/s11051-009-9820-x
- Titanium dioxide