Please use this identifier to cite or link to this item: https://scidar.kg.ac.rs/handle/123456789/13749
Title: Synthesis and characterization of silica core/multilayered cobalt ferrite-silica shell particles for lipase immobilization
Authors: Nikolić, Milan
Pavlović, Katarina
Stanojević-Nikolić, Slobodanka
Maricic, Aleksa
Srdić, Vladimir
Issue Date: 2021
Abstract: Multilayered core/shell particles were prepared by four-step deposition of cobalt ferrite layers and then deposition of external silica layer on the surface of silica core particles. The ferrite nanoparticles were obtained by co-precipitation of Co2+ and Fe3+ ions at pH=11 and pH=15, respectively. The agglomerated silica core/cobalt ferrite shell particles were obtained at extremely basic pH (pH=15), while at pH =11, monodispersed and non-aggregated core-shell particles were obtained. The poly(diallyldimethylammonium chloride)-functionalized silica core/ferrite shell particles were used as templates for deposition of mesoporous silica layers (obtained by neutralization of highly basic sodium silicate solution). The obtained porous multilayered core/shell particles were used as a host for covalent lipase immobilization inside the external silica layer. The initial activity of immobilized enzymes was about 13-fold lower than the native one, however, it showed good reusability and improved thermal stability compared to native ones.
URI: https://scidar.kg.ac.rs/handle/123456789/13749
Type: article
DOI: 10.1590/1980-5373-MR-2021-0130
ISSN: 1516-1439
SCOPUS: 2-s2.0-85114729989
Appears in Collections:Faculty of Agronomy, Čačak

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