One pot solvothermal synthesis of organic acid coated magnetic iron oxide nanoparticles

• VERÓNICA PAREDES-GARCÍA ^[1] ; NÉSTOR TOLEDO ^[2] ; JULIANO DENARDIN ^[2] ; DIEGO VENEGAS-YAZIGI ^[2] ; CARLOS CRUZ ^[2] ; EVGENIA SPODINE ^[2] ; ZHIPING LUO ^[3]
  1. [1] Universidad Andrés Bello

     Universidad Andrés Bello

     Santiago, Chile

     
  2. [2] CEDENNA
  3. [3] Texas A & M University Microscopy and Imaging Center and Materials Science and Engineering Program

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• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 58, Nº. 4, 2013, págs. 2011-2015
• Idioma: inglés
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  • In this work we present the synthesis and characterization of iron oxide nanoparticles (IONPs), which were structurally and magnetically characterized. The use of iron salts and an organic acid (l-serine or ascorbic acid) as precursors under solvothermal conditions yielded these coated IONPs. The powder X-ray diffraction pattern of FeO-1 and FeO-2 is consistent with hematite (α-Fe2O3) and hematite-maghemite ((α-Fe2O3/γ-Fe2O3) respectively. The TEM analysis permits to estimate an average size of 10 nm for the FeO-1 sample. The magnetic characterization of the samples through the M(H) plots showed a very low coercivity value for both samples, being 53 Oe for FeO-1 and 10 Oe for FeO-2, indicating the very weak ferromagnetic character of the synthesized iron oxide species. Even though both organic acids under solvothermal conditions permit to obtain coated IONPs in one pot reaction, l-serine produces a more narrow-size distribution.