title: Water disinfection through photoactive modified titania.
abstract: TiO(2), N-TiO(2) and S-TiO(2) samples have been prepared by various chemical methods. These samples were characterized by X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), Laser Raman spectrometer, UV-Visible spectrophotometer, field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM). X-ray powder diffraction study reveals that all three samples are single anatase phase of titania and the crystallinity of titania decreases with sulphur doping whereas nitrogen doping does not affect it. UV-Visible (diffuse) reflectance spectra shows that doping of titania with nitrogen and sulphur shift the absorption edge of titania from ultraviolet to visible region. XPS study confirms that both nitrogen and sulphur are well doped in the titania lattice. It is observed that nitrogen occupies at both substitutional and interstitial position in the lattice of titania. FE-SEM and TEM studies demonstrate that the particles are below 50nm range. It is found that S and N doping of titania increased its water disinfection property in the order TiO(2)<S-TiO(2)<N-TiO(2) under 8W UV/UV-Visible light irradiation.
authors.affiliation: CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India.
authors.forename: Diptipriya
authors.initials: D
authors.lastname: Sethi
authors.affiliation: CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India.
authors.forename: Ajoy
authors.initials: A
authors.lastname: Pal
authors.affiliation: CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India. Electronic address: velsak_r@yahoo.com.
authors.forename: Ramasamy
authors.initials: R
authors.lastname: Sakthivel
authors.affiliation: CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India.
authors.forename: Sony
authors.initials: S
authors.lastname: Pandey
authors.affiliation: CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India.
authors.forename: Tapan
authors.initials: T
authors.lastname: Dash
authors.affiliation: CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India.
authors.forename: Trupti
authors.initials: T
authors.lastname: Das
authors.affiliation: CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India.
authors.forename: Rohit
authors.initials: R
authors.lastname: Kumar
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology* / Q000528:radiation effects; D002384:Catalysis; D004203:Disinfection; D004926:Escherichia coli / Q000187:drug effects* / Q000254:growth & development; D008027:Light; D009584:Nitrogen / Q000737:chemistry* / Q000528:radiation effects; D055668:Photochemical Processes; D013455:Sulfur / Q000737:chemistry / Q000528:radiation effects; D014025:Titanium / Q000737:chemistry / Q000494:pharmacology* / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*
chemical_list: D000900:Anti-Bacterial Agents; C009495:titanium dioxide; D013455:Sulfur; D014025:Titanium; D009584:Nitrogen
keywords: Absorption; Antibacterial property; Doping; Reactive oxygen species; Titania