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Pregled bibliografske jedinice broj: 1040792

γ-irradiation generated ferrous ions affect the formation of magnetite and feroxyhyte


Marić, Ivan; Gotić, Marijan; Štefanić, Goran; Pustak, Anđela; Jurkin, Tanja
γ-irradiation generated ferrous ions affect the formation of magnetite and feroxyhyte // Radiation Physics and Chemistry, 170 (2020), 108648, 8 doi:10.1016/j.radphyschem.2019.108648 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 1040792 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
γ-irradiation generated ferrous ions affect the formation of magnetite and feroxyhyte

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

Izvornik
Radiation Physics and Chemistry (0969-806X) 170 (2020); 108648, 8

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

Ključne riječi
magnetite ; feroxyhyte ; gamma-irradiation ; DEAE-dextran ; 1, 10-phenantroline

Sažetak
1, 10-phenanthroline spectrophotometric method was used in order to systematically measure the quantity of Fe2+ ions that were generated upon γ-irradiation of alkaline Fe(III) aqueous solutions in the presence of diethylaminoethyl (DEAE)-dextran. γ-irradiation was performed in a range of doses from 5 to 130 kGy and the dose rate was ~26 kGy h-1. The results showed that γ-irradiation reduces Fe3+ to Fe2+ ; the reduction was initially very fast, but quickly slowed down and then reached a plateau of 100 % reduction. The quantity of Fe2+ in γ-irradiated suspensions and isolated solid product roughly overlap up to 45 % of Fe2+, because in this range the inverse spinel structure of substoichiometric magnetite nanoparticles was able to capture 30.1 % of Fe2+. The stoichiometries of the formed magnetite nanoparticles were very similar, which indicated that the absorbed dose did not have a significant influence on the magnetite stoichiometry, even though Fe2+ molar fraction increased from 22 to 45 % as a function of absorbed dose. When γ-irradiation generated more than 45 % of Fe2+ the powder samples consisted exclusively of Fe(III), i.e. of δ-FeOOH nanodiscs and poorly crystallized δ-FeOOH nanoparticles about 4 nm in size. The volume-averaged domain sizes and crystal aspect ratio of the δ-FeOOH nanodiscs increased from 16 nm to 25 nm and from 1.6 to 2.1 with the increase of absorbed dose, respectively. The use of DEAE-dextran in the γ-irradiation synthesis enabled the generation of up to 100 % of Fe2+ and synthesis of extremely stable aqueous suspensions of superparamagnetic magnetite nanoparticles as well as the synthesis of δ-FeOOH nanodiscs with high aspect ratios.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekti:
HRZZ-UIP-2017-05-7337 - Utjecaj polimera na radiolitičku sintezu magnetskih nanočestica (POLRADNANOP) (Jurkin, Tanja, HRZZ - 2017-05) ( POIROT)

Ustanove:
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Tanja Jurkin (autor)

Avatar Url Marijan Gotić (autor)

Avatar Url Anđela Pustak (autor)

Avatar Url Goran Štefanić (autor)

Avatar Url Ivan Marić (autor)

Citiraj ovu publikaciju

Marić, Ivan; Gotić, Marijan; Štefanić, Goran; Pustak, Anđela; Jurkin, Tanja
γ-irradiation generated ferrous ions affect the formation of magnetite and feroxyhyte // Radiation Physics and Chemistry, 170 (2020), 108648, 8 doi:10.1016/j.radphyschem.2019.108648 (međunarodna recenzija, članak, znanstveni)
Marić, I., Gotić, M., Štefanić, G., Pustak, A. & Jurkin, T. (2020) γ-irradiation generated ferrous ions affect the formation of magnetite and feroxyhyte. Radiation Physics and Chemistry, 170, 108648, 8 doi:10.1016/j.radphyschem.2019.108648.
@article{article, year = {2020}, pages = {8}, DOI = {10.1016/j.radphyschem.2019.108648}, chapter = {108648}, keywords = {magnetite, feroxyhyte, gamma-irradiation, DEAE-dextran, 1, 10-phenantroline}, journal = {Radiation Physics and Chemistry}, doi = {10.1016/j.radphyschem.2019.108648}, volume = {170}, issn = {0969-806X}, title = {γ-irradiation generated ferrous ions affect the formation of magnetite and feroxyhyte}, keyword = {magnetite, feroxyhyte, gamma-irradiation, DEAE-dextran, 1, 10-phenantroline}, chapternumber = {108648} }
@article{article, year = {2020}, pages = {8}, DOI = {10.1016/j.radphyschem.2019.108648}, chapter = {108648}, keywords = {magnetite, feroxyhyte, gamma-irradiation, DEAE-dextran, 1, 10-phenantroline}, journal = {Radiation Physics and Chemistry}, doi = {10.1016/j.radphyschem.2019.108648}, volume = {170}, issn = {0969-806X}, title = {γ-irradiation generated ferrous ions affect the formation of magnetite and feroxyhyte}, keyword = {magnetite, feroxyhyte, gamma-irradiation, DEAE-dextran, 1, 10-phenantroline}, chapternumber = {108648} }

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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