Gamma-irradiation synthesis of iron oxide nanoparticles in the presence of PEO, PVP or CTAB
| Autor: | Tanja Jurkin, Marijan Gotić, Irina Pucić, Goran Štefanić |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Goethite
Reducing agent Inorganic chemistry macromolecular substances 02 engineering and technology engineering.material 01 natural sciences Chloride chemistry.chemical_compound 0103 physical sciences medicine Radiation Aqueous solution Ethylene oxide 010308 nuclear & particles physics technology industry and agriculture 021001 nanoscience & nanotechnology Feroxyhyte chemistry visual_art Self-healing hydrogels visual_art.visual_art_medium engineering Magnetite Polymer CTAB Hydrogel Gamma-irradiation PVP PEO 0210 nano-technology Iron oxide nanoparticles medicine.drug |
| Zdroj: | Radiation Physics and Chemistry. 124:75-83 |
| ISSN: | 0969-806X |
| DOI: | 10.1016/j.radphyschem.2015.11.019 |
| Popis: | 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)2 upon γ-irradiation, which then under atmospheric conditions rapidly oxidized into δ-FeOOH. |
| Databáze: | OpenAIRE |
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