Naslov
Gamma-irradiation synthesis of iron oxide nanoparticles in the presence of PEO, PVP or CTAB

Autori
Jurkin, Tanja ; Gotić, Marijan ; Štefanić, Goran ; Pucić, Irina

Izvornik
Radiation physics and chemistry (1993) (0969-806X) 124 (2016); 75-83

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Magnetite ; Feroxyhyte ; Polymer ; CTAB ; Hydrogel ; Gamma-irradiation ; PVP ; PEO

Sažetak
Black hydrogels were synthesized using γ-irradiation of poly(ethylene oxide) (PEO)/iron(III) chloride precursor solutions. The magnetic properties of such hydrogels were improved by adding 2-propanol as a hydroxyl scavenger and/or NaBH4 as a strong chemical reducing agent ; however, the rigidity and compactness of thus synthesized PEO hydrogels deteriorated. The magnetic suspension containing pure magnetite nanoparticles was obtained using γ-irradiation of an Fe(III)/PEO deoxygenated aqueous solution in the presence of 2-propanol and NaBH4. The γ-irradiation of an iron(III) chloride aqueous precursor solution in the presence of PVP produced a magnetic suspension due to the formation of a small amount of δ-FeOOH (feroxyhyte). The γ-irradiation of Fe(III)/CTAB (cetyltrimethylammonium bromide) aqueous solutions favored the formation of goethite. γ-irradiation in the presence of 2-propanol increased the yield of rod-like goethite nanoparticles. A small amount of δ-FeOOH found in the Fe(III)/PVP and Fe(III)/CTAB suspensions suggests the formation of Fe(OH)2upon γ-irradiation, which then under atmospheric conditions rapidly oxidized into δ-FeOOH

Izvorni jezik
Engleski

Napomena
Rad je prezwtiran na skupu 13th “Tihany” Symposium on Radiation Chemistry.

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