title: Photoinactivation of bacteria by using Fe-doped TiO2-MWCNTs nanocomposites.
abstract: In this study, nanocomposites of Fe-doped TiO2with multi-walled carbon nanotubes (0.1- 0.5 wt. %) were prepared by using sol-gel method. The structural and morphological analysis were carried out with using X-ray diffraction pattern and transmission electron microscopy, which confirm the presence of pure anatase phase and particle sizes in the range 15-20 nm. X-ray photoelectron spectroscopy was used to determine the surface compositions of the nanocomposites. UV-vis diffuse reflectance spectra confirm redshift in the optical absorption edge of nanocomposites with increasing amount of multi-walled carbon nanotubes. Nanocomposites show photoinactivation against gram-positive Bacillus subtilis as well as gram-negative Pseudomonas aeruginosa. Fe-TiO2-multi-walled carbon nanotubes (0.5 wt. %) nanocomposites show higher photoinactivation capability as compared with other nanocomposites. The photoluminescence study reveals that the Fe-TiO2-multi-walled carbon nanotubes nanocomposites are capable to generate higher rate of reactive oxygen species species than that of other nanocomposites. Our experimental results demonstrated that the Fe-TiO2-multi-walled carbon nanotubes nanocomposites act as efficient antibacterial agents against a wide range of microorganisms to prevent and control the persistence and spreading of bacterial infections.
authors.affiliation: Center for Interdisciplinary Research, D.Y. Patil University, Kolhapur, 416 006, India.
authors.forename: Valmiki B
authors.initials: VB
authors.lastname: Koli
authors.affiliation: Center for Interdisciplinary Research, D.Y. Patil University, Kolhapur, 416 006, India. sddelekar7@rediffmail.com.|Department of Chemistry, Shivaji University, Kolhapur, 416 004, India. sddelekar7@rediffmail.com.
authors.forename: Sagar D
authors.initials: SD
authors.lastname: Delekar
authors.affiliation: Center for Interdisciplinary Research, D.Y. Patil University, Kolhapur, 416 006, India. shpawar1946@gmail.com.
authors.forename: Shivaji H
authors.initials: SH
authors.lastname: Pawar
mesh_terms: D001412:Bacillus subtilis; D001419:Bacteria / Q000187:drug effects; D001424:Bacterial Infections / Q000188:drug therapy; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D006801:Humans; D007501:Iron / Q000737:chemistry*; D008027:Light; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites; D037742:Nanotubes, Carbon / Q000737:chemistry; D010316:Particle Size; D044367:Phase Transition; D055668:Photochemical Processes; D056951:Photoelectron Spectroscopy; D011550:Pseudomonas aeruginosa; D017382:Reactive Oxygen Species / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: D037742:Nanotubes, Carbon; D017382:Reactive Oxygen Species; C009495:titanium dioxide; D002244:Carbon; D014025:Titanium; D007501:Iron