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Synthesis and characterization of FeO(OH)/Fe3O4 nanoparticles encapsulated in zeolite matrix

R. BOSÎNCEANU1,* , N. SULIŢANU1

Affiliation

  1. Department of Physics,”Al. I. Cuza” University, Bd. Carol I, Nr.11, 700506 Iasi, Romania

Abstract

Nanoparticles and nanoclusters of FeO(OH)/Fe3O4 have been incorporated by co-precipitation in the clinoptilolite channels. In the present study, we demonstrate the coexistence of paramagnetic and superparamagnetic Fe(III) in clinoptilolite. The bound of trivalent iron in clinoptilolite results in the formation iron oxide nanoclusters in microvoids, and stabilize AlO4 tetrahedral in the aluminosilicate matrix. The resulting non-framework and bound Fe(III) exhibit superparamagnetic and paramagnetic properties, respectively. The dual behavior of Fe(III) in CLI is deduced using various analytical and spectroscopic techniques, e.g. X-ray diffraction (XRD), diffuse reflectance ultraviolet-visible (DRUV-VIS) and magnetization measurements at room temperature with vibrating magnetometer..

Keywords

Clinotilolite, Microporous molecular sievesm Iron oxide nanoclusters, Paramagnetism, Superparamagnetism.

Submitted at: Nov. 7, 2008
Accepted at: Dec. 10, 2008

Citation

R. BOSÎNCEANU, N. SULIŢANU, Synthesis and characterization of FeO(OH)/Fe3O4 nanoparticles encapsulated in zeolite matrix, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 12, pp. 3482-3486 (2008)