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Nanostructured assemblies of mesoporous matrices of layered double hydroxides – nanoparticles of iron oxides

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Capitol de carte

Autori: Gabriela Carja, Yoshikazu Kameshima, Akira Nakajima, Kiiyoshi Okada

Editorial: editor Lynn T Burness, Nova Science Publisher New York, Mesoporous Materials: Properties, Preparation and Applications, 2010.

Rezumat:

Nanostructured assemblies of iron partially substituted anionic clays supported with nanoparticles of iron oxides have been obtained during the reconstruction process of the clay layered structure by manipulating its structural “memory effect”. The morphology, composition and phase structure of as-prepared powders were characterized by X-ray diffraction (XRD), N2 adsorption (SBET,Vp), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The samples combine the typical paramagnetic behavior induced by the supported nanoparticles of Fe2O3 with the surface and textural functionality of the porous clay framework into one single material. In the straightforward synthesis route the reconstruction process of the clay, the formation of nanoparticles of iron oxides and their loading on the larger particles of the clay take place in one single step. The multifunctional capabilities of Fe2O3/FeLDH nanoarchitecture can be used to overcome the bio-toxicity of the nanoparticles of iron oxides and thus to diversify their biomedical applications.

Cuvinte cheie: nanostructured materials, iron, magnetic materials