Abstract
Silver supported on hydroxyapatite-core–shell magnetic γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp-Ag NPs) as a new, heterogeneous, and magnetically reusable nanocatalyst has been prepared under mild conditions and characterized by FT-IR, TEM, SEM, VSM, and XRD analysis. Then, γ-Fe2O3@HAp-Ag NPs was used for the oxidation of sulfides to sulfoxides with 33% aqueous H2O2 (0.5 ml) as an oxidant under solvent-free conditions at room temperature in good to excellent yields and short reaction time. Short reaction time and high yields of the desired products, non-toxicity of reagent, high catalytic activity, ecofriendly reaction conditions, operational simplicity, and ease of recovery from the reaction mixture using an external magnet are the advantages of the present method.
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