ONE POT SOLVOTHERMAL SYNTHESIS OF ORGANIC ACID COATED MAGNETIC IRON OXIDE NANOPARTICLES

Journal of The Chilean Chemical Society

VENEGAS-YAZIGI, DIEGO¹  TOLEDO, NÉSTOR¹  DENARDIN, JULIANO¹  SPODINE, EVGENIA¹  PAREDES-GARCÍA, VERÓNICA²  LUO, ZHIPING³  CRUZ, CARLOS³ 

[1] CEDENNA, Chile;Universidad Andres Bello, Chile;Universidad de Santiago de Chile, Chile

关键词: Iron oxide;    nanoparticles;    hematite;    maghemite;    solvothermal synthesis;    magnetism;   

DOI  :  10.4067/S0717-97072013000400023

学科分类：化学（综合）

来源: Sociedad Chilena de Quimica

【 摘 要 】

In this work we present the synthesisand characterization of iron oxide nanoparticles (IONPs), which were structurallyand magnetically characterized. The use of iron salts and an organic acid (l-serineor ascorbic acid) as precursors under solvothermal conditions yielded thesecoated IONPs. The powder X-ray diffraction pattern of FeO-1 and FeO-2is consistent with hematite (α-Fe2O3)and hematite-maghemite ((α-Fe2O3/γ-Fe2O3)respectively. The TEM analysis permits to estimate an average size of 10 nmfor the FeO-1 sample. The magnetic characterization of the samples throughthe M(H) plots showed a very low coercivity value for both samples, being53 Oe for FeO-1 and 10 Oe for FeO-2, indicating the very weak ferromagneticcharacter of the synthesized iron oxide species. Even though both organic acidsunder solvothermal conditions permit to obtain coated IONPs in one pot reaction,l-serine produces a more narrow-size distribution.

【 授权许可】

Unknown