γFe2O3 Modified with C18 Carboxylic Acids:A Magnetic Carrier for Immobilized Organic Compoundsстатья
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Дата последнего поиска статьи во внешних источниках: 5 мая 2015 г.
Аннотация:Ferromagnetic γFe2O3 was modified with stearic and oleic acids. Diffuse reflection spectra show that modification occurs both via the interaction with free surface hydroxyl groups and by forming bidentate carboxylates with iron atoms. Surface modification enhances adsorption of watersoluble organic dyes (orange acid and methylene blue dyes, cytochrome C enzyme) due to contribution of hydrophobic interac tion to adsorption. Differences in adsorption of dyes onto the modified γFe2O3 caused by different structures of hydrocarbon chains in stearic and oleic acids were revealed. The effect of electrolyte concentration and pH of a solution on adsorption of cytochrome C was studied. The activated iron(III) oxide can be used as a magnetic carrier for immobilized enzymes in bioreactors and for targeted drug delivery.