Giraldi, Tania R. [UNESP]Arruda, Cezar C.da Costa, Geraldo M.Longo, Elson [UNESP]Ribeiro, Caue2014-05-202014-05-202009-11-01Journal of Sol-gel Science and Technology. Dordrecht: Springer, v. 52, n. 2, p. 299-303, 2009.0928-0707http://hdl.handle.net/11449/41684Nanoparticles composed of iron oxides and iron salts were obtained from polymeric resins produced by polymerizing Fe(2+)-citrate and Fe(3+)-citrate complexes with ethylene glycol. The citric acid:Fe molar ratio was varied to obtain different synthesis conditions. The materials were treated at 450 degrees C for 2 h to obtain nanoparticles, which were characterized by XRD, Mossbauer spectroscopy, FEG, CHNS, atomic absorption and surface area through N(2) physisorption. Rhodamine B photo degradation in the presence of these nanoparticles and hydrogen peroxide was carried out to analyze the possible behavior of nanoparticles as heterogeneous Fenton reactants. UV-visible spectroscopy revealed that the catalytic activity in the presence of nanoparticles obtained with a citric acid:Fe molar ratio of 12:1 was the condition that provided the best results in this work.299-303engPhotodegradationDyeWater treatmentFerritesPolymeric precursorsArtigo10.1007/s10971-009-2014-2WOS:000270388800017Acesso restrito8498310891810082