Silica coated ferrite nanoparticles: Influence of citrate functionalization procedure on final particle morphology
Source abstract
Abstract
Abstract In this paper, magnetic nanoparticles (Fe3O4 and NiFe2O4) were coated with a biocompatible silica shell via hydrolysis and condensation of tetraethyl orthosilicate (TEOS) by the Stober process. Magnetic nanoparticles, prepared by chemical co-precipitation from iron and nickel salts, were functionalized with citric acid, in order to provide their deagglomeration and to enable their coating with silica. The parameters of the functionalization procedure were varied (concentration–pH and type of treatment), in order to examine if and how this particular step of preparation affects the final morphology of the core-shell particles. Transmission electron microscopy, zeta potential and particle size measurements revealed that the morphology and the size of obtained core shell particles depend significantly on the core particle size, and thus on the parameters of the functionalization step.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties and Synthesis of Ferrites · Iron oxide chemistry and applications · Nanomaterials for catalytic reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (24)
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1. An overview of the structure and magnetism of spinel ferrite nanoparticles and their synthesis in microemulsions10.1016/j.cej.2006.11.001 ↗
2. Preparation and study of NiFe2O4/SiO2 core-shell nanocomposites10.1016/j.jallcom.2009.07.187 ↗
3. Preparation and characterization of nanosize nickel-substituted cobalt ferrites (Co1−xNixFe2O4)10.1016/j.jssc.2005.07.020 ↗
4. Incorporation of iron oxide nanoparticles and quantum dots into silica microspheres10.1021/nn700344x ↗
5. Investigation of formation of silica-coated magnetite nanoparticles via sol–gel approach10.1016/j.colsurfa.2005.04.009 ↗
6. An improved way to prepare superparamagnetic magnetite–silica core-shell nanoparticles for possible biological application10.1016/j.jmmm.2004.07.016 ↗
7. Controlled growth of mesoporous silica spheres in the micron size range10.1016/0021-9797(68)90272-5 ↗
8. Modyfying the surface properties of superparamagnetic iron oxide nanoparticles through a sol–gel approach10.1021/nl015681q ↗
9. Preparation of core shell particles consisting of cobalt ferrite and silica by sol–gel process10.1016/j.jallcom.2005.07.048 ↗
10. Engineering and characterization of mesoporous silica-coated magnetic particles for mercury removal from industrial effluents10.1016/j.apsusc.2007.11.048 ↗
11. Silica coated nanoparticles: synthesis, magnetic properties and spin structure10.1016/j.jallcom.2008.08.121 ↗
12. Morphological studies of randomized dispersion magnetite nanoclusters coated with silica10.1016/j.ceramint.2010.09.010 ↗
13. Preparation and characterization of ultra-stabile biocompatibile magnetic fluids using citrate-coated cobalt ferrite nanoparticles10.1016/j.tsf.2005.12.079 ↗
14. Synthesis protocol influence on aquous magnetic fluid properties10.1016/j.cap.2008.12.003 ↗
15. Surface charging, polyanionic coating and colloid stability of magnetite nanoparticles10.1016/j.colsurfa.2008.12.039 ↗
16. Scherrer after sixty years: a survey and some new results in the determination of crystallite size10.1107/S0021889878012844 ↗
17. Magnetic nanoparticles: synthesis, protection, functionalization, and application10.1002/anie.200602866 ↗
18. A biodegradable and biocompatible PVA–citric acid polyester with potential applications as matrix for vascular tissue engineering10.1007/s10856-008-3599-7 ↗
19. Stability of dispersions of colloidal nickel ferrite spheres10.1006/jcis.2001.7882 ↗
20. The effects of particle size and surface coating on the cytotoxicity of nickel ferrite10.1016/j.biomaterials.2005.02.036 ↗
21. Aqueous ferrofluid of citric acid coated magnetite particles
22. Zeta Potential of Colloids in Water and Waste Water, ASTM Standard D 4187-82, American Society for Testing and Materials, 1985.
23. Synthesis of water soluble graphene10.1021/nl080604h ↗
24. Interactions of metal hydrous oxiders with chelating agents. hematite-oxalic acid and citric acid systems10.1021/la00062a004 ↗