Naslov
Synthesis route to δ-FeOOH nanodiscs

Autori
Jurkin, Tanja ; Štefanić, Goran ; Dražić, Goran ; Gotić, Marijan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
The Twenty-fourth Croatian-Slovenian Crystallographic Meeting - Book of Abstracts / Bijelić, Mirjana i ostali - Zagreb : Hrvatska akademija znanosti i umjetnosti (HAZU) ; Hrvatska Kristalografska Zajednica, 2016, 28-28

Skup
24th Croatian-Slovenian Crystallographic Meeting

Mjesto i datum
Bol, Hrvatska, 21.09.2016. - 25.09.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
δ-FeOOH ; nanodiscs ; synthesis ; DEAE-dextran ; γ-irradiation

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 stable suspension transformed to δ-FeOOH reddish powder that consists of rather uniform regular nanodiscs (Fig. 1). 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

Znanstvena područja
Kemija

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