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Title: Multifunctional P and Mn co-doped titania nanoparticles as efficient visible light driven photocatalyst
Authors: Thota, Susmitha
Tirukkovalluri, Sivarao
Bojja, Sreedhar
Sankar, Girija G
Keywords: Photochemistry;Nanoparticles;Dye degradation;Azo dyes;Photocatalysts;Co-doped photocatalysts;Titania;Manganese;Phosphorus;Antibacterial activity
Issue Date: 13-Nov-2014
Abstract: Phosphorus and manganese co-doped titanium dioxide nanoparticles have been synthesized by sol-gel method and characterized by XRD, UV-visible DRS, XPS, SEM, TEM and BET. XRD data show the anatase phase in all the samples, while XPS analysis shows the dopant phosphorus in the P5+ state and manganese in the Mn4+/Mn3+ states. The co-doped catalysts show a particle size of 7 nm, with strong absorption in the visible region. The photocatalytic activity of the as-prepared catalysts has been tested by degradation of the azodye, acid orange 7 under artificial light as well as under direct sunlight. Photoluminiscence studies with the co-doped catalysts show enhanced generation of hydroxyl radicals, the key oxidative species in photocatalytic reactions. In addition, the antibacterial activity of the nanoparticles against Escherichia coli has also been investigated. The results indicate that the as co-doped TiO2 nanoparticles can be used not only as an efficient photocatalyst for potential applications in the fields of pollution abatement process but also as an excellent antibacterial agent.
Page(s): 1384-1390
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.53A(11) [November 2014]

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