Titanium dioxide-coated nanofibers for advanced filters
ABSTRACT 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.