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The impact of dextran sulfate on the radiolytic synthesis of magnetic iron oxide nanoparticles


Marić, Ivan; Štefanić, Goran; Gotić, Marijan; Jurkin, Tanja
The impact of dextran sulfate on the radiolytic synthesis of magnetic iron oxide nanoparticles // Journal of molecular structure, 1183 (2019), 126-136 doi:10.1016/j.molstruc.2019.01.075 (međunarodna recenzija, članak, znanstveni)


Naslov
The impact of dextran sulfate on the radiolytic synthesis of magnetic iron oxide nanoparticles

Autori
Marić, Ivan ; Štefanić, Goran ; Gotić, Marijan ; Jurkin, Tanja

Izvornik
Journal of molecular structure (0022-2860) 1183 (2019); 126-136

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

Ključne riječi
Iron oxides ; gamma-irradiation ; dextran sulfate ; green rust ; iron(II) hydroxide ; feroxyhyte ; mackinawite

Sažetak
Iron(III) chloride deoxygenated alkaline aqueous colloidal solutions in the presence of 2-propanol and dextran sulfate were γ- irradiated with doses of 36 and 130 kGy. The dose rate was ∼31 kGy h−1. The samples isolated by washing with water mainly consisted of γ- FeOOH (lepidocrocite), δ-FeOOH and schwertmannite. The samples isolated by washing with ethanol contained mainly α-FeOOH (goethite), δ-FeOOH (feroxyhyte) and iron(III) hydroxide sulfate. At lower dose (36 kGy) magnetite (Fe3O4) was formed. The samples isolated by admixing glycerol consisted of the intermediate phases Fe(OH)2, GR(SO42−) and non- stoichiometric FeS1-x (mineral name mackinawite). The amounts of Fe(II) in glycerol-isolated solid samples were 60.5% and 82.6% as determined by Mössbauer spectroscopy at doses of 36 and 130 kGy, respectively. The amount of Fe2+ in the acidified solutions containing dissolved γ-irradiation products was determined using potassium permanganate titration. The amounts of Fe2+ in acidified solutions were 72.0% and 92.0% at doses of 36 and 130 kGy, respectively. Thus, although the conventionally isolated powders consisted exclusively of Fe(III) products, the high reducing conditions upon γ-irradiation were confirmed by capturing the Fe(II) intermediate phases and by quantitative determinations of ferrous ions in the solid samples and solutions containing dissolved γ-irradiation products.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
HRZZ-UIP-2017-05-7337 - Utjecaj polimera na radiolitičku sintezu magnetskih nanočestica (Tanja Jurkin, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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