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http://hdl.handle.net/123456789/919
Title: | Sol–gel doped TiO2 nanomaterials: a comparative study | Authors: | Raileanu, Malina Crisan, Maria Dragan, Nicolae Crisan, Dorel Galtayries, Anouk Braileanu, Ana Ianculescu, Adelina Teodorescu, Valentin Nitoi, Ines Anastasescu, Mihai |
Keywords: | Ag-doped TiO2;Coatings;Nanopowders;S-doped TiO2;Sol–gel;Water purification | Issue Date: | 2009 | Publisher: | Springer | Abstract: | Among the great number of sol–gel prepared nanomaterials, TiO2 has attracted significant interest due to its high photocatalytic activity, excellent functionality, thermal stability and non-toxicity. The photocatalytic degradation of pollutants using un-doped and doped TiO2 nanopowders or thin films is very attractive for applications in environmental protection, as a possible solution for water purification. The present work describes a comparative structural and chemical study of un-doped TiO2 and the corresponding S- and Ag-doped materials. The photocatalytic activity was established by testing the degradation of organic chloride compounds from aqueous solutions. Sol–gel Ag-doped TiO2 coatings, prepared by co-gelation and sol–gel Ag-doped TiO2 coatings obtained from nanopowders were also compared. Their structural evolution and crystallization behaviour (lattice parameters, crystallite sizes, internal strains) with thermal treatment were followed by thermal analysis, X-ray diffraction, transmission electron microscopy, atomic force microscopy and specific surface areas measurements. X-ray photoelectron spectroscopy analyses were performed to characterize the surface composition and S or Ag speciation, which was used to interpret the catalytic data. |
Description: | Journal of Sol-Gel Science and Technology |
URI: | http://hdl.handle.net/123456789/919 |
Appears in Collections: | Articles |
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