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Metal doped nanosized titania used for the photocatalytic degradation of rhodamine B dye under visible-light

Mahlambi, Mphilisi M and Mishra, Ajay K and Mishra, Shivani B and Krause, Rui W and Mamba, Bhekie B and Raichur, Ashok M (2013) Metal doped nanosized titania used for the photocatalytic degradation of rhodamine B dye under visible-light. In: Journal of Nanoscience and Nanotechnology, 13 (7). pp. 4934-4942.

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Official URL: http://dx.doi.org/10.1166/jnn.2013.7587


Metal-doped anatase nanosized titania photocatalysts were successfully synthesized using a sal gel process. Different amounts of the dopants (0.2, 0.4, 0.6, 0.8 and 1.0%) of the metals (Ag, Ni, Co and Pd) were utilized. The UV-Vis spectra (solid state diffuse reflectance spectra) of the doped nanoparticles exhibited a red shift in the absorption edge as a result of metal doping. The metal-doped nanoparticles were investigated for their photocatalytic activity under visible-light irradiation using Rhodamine B (Rh B) as a control pollutant. The results obtained indicate that the metal-doped titania had the highest activity at 0.4% metal loading. The kinetic models revealed that the photodegradation of Rh B followed a pseudo first order reaction. From ion chromatography (IC) analysis the degradation by-products Rhodamine B fragments were found to be acetate, chloride, nitrite, carbonate and nitrate ions.

Item Type: Journal Article
Publication: Journal of Nanoscience and Nanotechnology
Publisher: American Scientific Publishers
Additional Information: Copyright of this article belongs to American Scientific Publishers.
Keywords: Metal Doped Titania; Band Gap; Photocatalytic Degradation; Rhodamine B; Visible-Light Irradiation
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 03 Sep 2013 06:34
Last Modified: 03 Sep 2013 06:34
URI: http://eprints.iisc.ac.in/id/eprint/46963

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