| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000403105 |
| ISSN: | 0103-9733 |
| Authors: | Marques, R.F.C1 Caiut, J.M.A1 Paiva-Santos, C.O1 Ribeiro, S.J.L1 Messaddeq, Y1 Garcia, C2 Neumeyer, D2 Dexpert, H2 Verelst, M2 Dexpert-Ghys J2 |
| Institutions: | 1Universidade Estadual Paulista "Julio de Mesquita Filho", Instituto de Quimica, Araraquara, Sao Paulo. Brasil 2Universite de Toulouse III (Paul Sabatier), Toulouse, Haute-Garonne. Francia |
| Year: | 2009 |
| Season: | Abr |
| Volumen: | 39 |
| Number: | 1A |
| Pages: | 176-181 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico |
| English abstract | The Spray Pyrolysis (SP) process has been employed at moderate temperature (470-970 K) for the synthesis of micro- and nano-particles of hydrated metal oxides and of related nanocomposites. It has been applied to iron nitrate solutions, without or with the addition of sodium chloride as a flux. After removal of the flux, nanocomposites of ferrihydrite (5Fe2O3,9H2O) / hematite (α- Fe2O3) / and an amorphous Fe2O3 are obtained, with surface area 140 m2 /g. It has been applied also to a sol of Aluminum-tri-sec-butoxide, without or with activation by europium or terbium ions. Boehmite (γ-AlOOH) powders are synthesized at 470 K, with surface area equal to 180 m2 /g. Transition alumina ( γ-Al2O3) are synthesized at 970 K. Nanocomposites made by reaction of the boehmite or γ-Al2O3 particles with the amino acid asparagin (ASN) have been prepared and characterized. The luminescence of the Eu3+ or Tb3+ doped nanocomposites has been investigated: they can be considered as bio-compatible luminescent nanoparticles |
| Disciplines: | Física y astronomía |
| Keyword: | Física de materia condensada, Nanotecnología, Nanopartículas, Nanocompuestos, Rocío pirolítico |
| Keyword: | Physics and astronomy, Condensed matter physics, Nanotechnology, Nanoparticles, Nanocomposites, Spray pyrolysis |
| Full text: | Texto completo (Ver PDF) |
