Artículos de revistas
Synthesis and characterization of magnetic mesoporous particles
Registro en:
Journal Of Colloid And Interface Science. Academic Press Inc Elsevier Science, v. 342, n. 2, n. 269, n. 277, 2010.
0021-9797
WOS:000274117400008
10.1016/j.jcis.2009.10.052
Autor
Morales, MA
Mascarenhas, AJS
Gomes, AMS
Leite, CAP
Andrade, HMC
de Castilho, CMC
Galembeck, F
Institución
Resumen
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Magnetic mesoporous particles were synthesized and their magnetic and structural properties are reported. The synthesis procedure consists of four steps: (i) preparation of magnetite colloidal nanoparticles; (ii) growth of a silica layer; (iii) development of the mesoporous structure and (iv) template removal. Two different methods for the template removal were studied and their effectiveness was discussed. Magnetization and Mossbauer spectroscopy measurements showed superparamagnetic behavior for the particles at room temperature. X-ray diffraction and nitrogen adsorption measurements showed a mesoporous MCM-41 structure with 2.48 nm pore diameter and 1023 m(2)/g total area. (C) 2009 Elsevier Inc. All rights reserved. 342 2 269 277 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)