Pregled bibliografske jedinice broj: 805942
Synthesis route to δ-FeOOH nanodiscs
Synthesis route to δ-FeOOH nanodiscs // Materials letters, 173 (2016), 55-59 doi:10.1016/j.matlet.2016.03.009 (međunarodna recenzija, članak, znanstveni)
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Naslov
Synthesis route to δ-FeOOH nanodiscs
Autori
Jurkin, Tanja ; Štefanić, Goran ; Dražić, Goran ; Gotić, Marijan
Izvornik
Materials letters (0167-577X) 173
(2016);
55-59
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
delta-FeOOH ; feroxyhyte ; nanoparticles ; dextran ; gamma-irradiation ; mössbauer
Sažetak
δ-FeOOH is a synthetic analogue of a relatively uncommon mineral feroxyhyte (δ’-FeOOH). The conventional syntheses of δ-FeOOH start from the Fe(II) salt and proceed by a rapid oxidation of iron(II) hydroxide with H2O2. The new synthesis route to δ-FeOOH nanodiscs reported in this work is based on the γ-irradiation of a deoxygenated iron(III)chloride alkaline aqueous colloidal solution in the presence of 2-propanol and diethylaminoethyl-dextran hydrochloride (DEAE-dextran). γ-irradiation of the colloidal solution enabled the strong reducing conditions thus favouring the reduction of Fe(III) to Fe(II). Under such strong reducing conditions the white suspension characteristic of Fe(OH)2 was formed. When the white suspension came into contact with oxygen from air it rapidly oxidized into stable green-gray suspension characteristic of Fe(II)-Fe(III) hydrochloride known as Green Rust I. In the conventional process of sample isolation the green-gray suspension transformed to δ-FeOOH reddish powder that consists of rather uniform regular nanodiscs. The synthesized δ-FeOOH nanodiscs are magnetic and contain a magnetically ordered component in the Mössbauer spectrum at room temperature. It is expected that the results of this work will have a strong impact on finding new synthetic routes to the δ-FeOOH.
Izvorni jezik
Engleski
POVEZANOST RADA
Ustanove:
Institut "Ruđer Bošković", Zagreb
Citiraj ovu publikaciju:
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