Water disinfection through photoactive modified titania
| Autor: | Ajoy Pal, Rohit Kumar, Tapan Dash, Sony Pandey, R. Sakthivel, Diptipriya Sethi, Trupti Das |
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| Rok vydání: | 2014 |
| Předmět: |
Titanium
Anatase Radiation Materials science Light Radiological and Ultrasound Technology Nitrogen Doping Biophysics Analytical chemistry Photochemical Processes Catalysis Anti-Bacterial Agents Water Purification Disinfection Crystallinity Absorption edge X-ray photoelectron spectroscopy Transmission electron microscopy Escherichia coli Radiology Nuclear Medicine and imaging Sulfur Powder diffraction Diffractometer |
| Zdroj: | Journal of Photochemistry and Photobiology B: Biology. 130:310-317 |
| ISSN: | 1011-1344 |
| DOI: | 10.1016/j.jphotobiol.2013.12.003 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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