2 documents found, page 1 of 1
Photocatalytic decolorization of methylene blue in the presence of TiO2/ZnS nan...
Franco, A.; Neves, M.C.; Ribeiro Carrott, M.M.L.; Mendonça, M.H.; Pereira, M.I.; Monteiro, O.C.The synthesis of distinct nanocrystalline TiO2 capped ZnS sampleswas carried out using a chemical deposition method. The materials characterization showed that the presence of ZnS onto TiO2 surface results in a red shift of the material band edge when compared with the initial semiconductor. The photocatalytic activity of the prepared nanocomposites was tested on the decolorization of methylene blue (MB) aqueou...
Ferromagnetic order in aged Co-doped TiO2 anatase nanopowders
Silvestre, António Jorge; Pereira, L.C.J.; Nunes, M.R.; Monteiro, O.C.Oxide based diluted magnetic semiconductor (DMS) materials have been a subject of increasing interest due to reports of room temperature ferromagnetism in several systems and their potential use in the development of spintronic devices. However, concerns on the stability of the magnetic properties of different DMS systems have been raised. Their magnetic moment is often unstable, vanishing with a characteristic...