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Water disinfection through photoactive modified titania

Paper ID Volume ID Publish Year Pages File Format Full-Text
30453 44478 2014 8 PDF Available
Title
Water disinfection through photoactive modified titania
Abstract

•Nitrogen doping strongly shifts the absorption edge of titania from UV to visible region.•Sulpur doping decreases the crystallinity of titania whereas nitrogen does not affect it.•Nitrogen occupies at both substitutional and interstitial position of titania lattice.•N-TiO2 exhibits superior water disinfection property than S-TiO2 and TiO2.

TiO2, N-TiO2 and S-TiO2 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 50 nm range. It is found that S and N doping of titania increased its water disinfection property in the order TiO2 < S-TiO2 < N-TiO2 under 8 W UV/UV–Visible light irradiation.

Keywords
Titania; Doping; Absorption; Reactive oxygen species; Antibacterial property
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Water disinfection through photoactive modified titania
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 130, 5 January 2014, Pages 310–317
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us