Akademik Veri Yönetim Sistemi
ChemistrySelect, cilt.9, sa.11, 2024 (SCI-Expanded)
In response to the current challenges in the field, this study will contribute to the development of a highly versatile magnetic core/shell nanocomposite by addressing issues in the synthesis and functionalization of Fe3O4 nanoparticles through the presentation of innovative solutions. Firstly, Fe3O4 nanoparticles were synthesized. Tetraethyl orthosilicate was used as a silicon source and Fe3O4@SiO2 magnetic nanoparticles were synthesized. The outer surface of Fe3O4@SiO2 nanoparticles were modified and converted into Fe3O4@SiO2−NH2 structure. These modified particles were then functionalized with alkyl bromide to be used as an ATRP initiator and Fe3O4@SiO2−Br structure was obtained. The polymerization of 2-(dimethylamino)ethyl methacrylate (DMA) monomer on the particle surface was achieved by the SI-ATRP method. In the last step, betainization of Fe3O4@SiO2−PDMA composite was worked, and the salts of gold and silver were added to composite systems. The dispersions of the metal loaded Fe3O4@SiO2−βPDMA composite was obtained and used as catalysts in the reduction reaction of p-nitrophenol to p-aminophenol. Consequently, Fe3O4@SiO2−βPDMA composite system with magnetic properties in the range of 145–160 nm was prepared. The structure of synthesized magnetic nanoparticle was characterized by PXRD, TEM, TG-DTA and the catalyst activity in the reduction reaction of p-nitrophenol to p-aminophenol was examined by UV-vis spectrophotometer.