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Title: A facile two-step modifying process for preparation of poly(SStNa)-grafted Fe{sub 3}O{sub 4}/SiO{sub 2} particles

Abstract

This article reports the synthesis of the poly(sodium 4-styrenesulfonate)-grafted Fe{sub 3}O{sub 4}/SiO{sub 2} particles via two steps. The first step involved magnetite nanoparticles (Fe{sub 3}O{sub 4}) homogeneously incorporated into silica spheres using the modified Stoeber method. Second, the modified silica-coated Fe{sub 3}O{sub 4} nanoparticles were covered with the outer shell of anionic polyelectrolyte by surface-initiated atom transfer radical polymerization. The resulted composites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive microscopy (EDS), Fourier transform-infrared (FT-IR), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and vibration sample magnetometer (VSM). The XRD results indicated that the surface modified Fe{sub 3}O{sub 4} nanoparticles did not lead to phase change compared with the pure Fe{sub 3}O{sub 4}. TEM studies revealed nanoparticles remained monodisperse. The detection of sulfur and sodium signals was a convincing evidence that sodium 4-styrenesulfonate was grafted onto the surface of the magnetic silica in XPS analysis. Finally, super-paramagnetic properties of the composite particles, and the ease of modifying the surfaces may make the composites of important use in mild separation, enzyme immobilization, etc. - Graphical abstract: shows TEM images of silica-coated Fe{sub 3}O{sub 4} particles. The magnetic silica particles with well-defined core/shell structures were rather monodisperse, even thoughmore » silica shells have trapped more than one magnetic core. The Fe{sub 3}O{sub 4}/SiO{sub 2} particles used in this case for the production of composite particles had an average diameter of 70{+-}10 nm obtained by TEM images.« less

Authors:
;  [1]
  1. Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Ministry of Education, School of Chemistry and Materials Science, Xi'an 710062 (China)
Publication Date:
OSTI Identifier:
21043914
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 181; Journal Issue: 3; Other Information: DOI: 10.1016/j.jssc.2007.12.004; PII: S0022-4596(07)00518-X; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; FOURIER TRANSFORMATION; INFRARED SPECTRA; IRON OXIDES; MAGNET CORES; MAGNETIC CORES; MAGNETITE; NANOSTRUCTURES; PARAMAGNETISM; POLYMERIZATION; SILICON OXIDES; SURFACES; SYNTHESIS; THERMAL GRAVIMETRIC ANALYSIS; TRANSMISSION ELECTRON MICROSCOPY; VIBRATING SAMPLE MAGNETOMETERS; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Lei Zhongli, Yanli, Li, and Xiangyu, Wei. A facile two-step modifying process for preparation of poly(SStNa)-grafted Fe{sub 3}O{sub 4}/SiO{sub 2} particles. United States: N. p., 2008. Web.
Lei Zhongli, Yanli, Li, & Xiangyu, Wei. A facile two-step modifying process for preparation of poly(SStNa)-grafted Fe{sub 3}O{sub 4}/SiO{sub 2} particles. United States.
Lei Zhongli, Yanli, Li, and Xiangyu, Wei. 2008. "A facile two-step modifying process for preparation of poly(SStNa)-grafted Fe{sub 3}O{sub 4}/SiO{sub 2} particles". United States.
@article{osti_21043914,
title = {A facile two-step modifying process for preparation of poly(SStNa)-grafted Fe{sub 3}O{sub 4}/SiO{sub 2} particles},
author = {Lei Zhongli and Yanli, Li and Xiangyu, Wei},
abstractNote = {This article reports the synthesis of the poly(sodium 4-styrenesulfonate)-grafted Fe{sub 3}O{sub 4}/SiO{sub 2} particles via two steps. The first step involved magnetite nanoparticles (Fe{sub 3}O{sub 4}) homogeneously incorporated into silica spheres using the modified Stoeber method. Second, the modified silica-coated Fe{sub 3}O{sub 4} nanoparticles were covered with the outer shell of anionic polyelectrolyte by surface-initiated atom transfer radical polymerization. The resulted composites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive microscopy (EDS), Fourier transform-infrared (FT-IR), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and vibration sample magnetometer (VSM). The XRD results indicated that the surface modified Fe{sub 3}O{sub 4} nanoparticles did not lead to phase change compared with the pure Fe{sub 3}O{sub 4}. TEM studies revealed nanoparticles remained monodisperse. The detection of sulfur and sodium signals was a convincing evidence that sodium 4-styrenesulfonate was grafted onto the surface of the magnetic silica in XPS analysis. Finally, super-paramagnetic properties of the composite particles, and the ease of modifying the surfaces may make the composites of important use in mild separation, enzyme immobilization, etc. - Graphical abstract: shows TEM images of silica-coated Fe{sub 3}O{sub 4} particles. The magnetic silica particles with well-defined core/shell structures were rather monodisperse, even though silica shells have trapped more than one magnetic core. The Fe{sub 3}O{sub 4}/SiO{sub 2} particles used in this case for the production of composite particles had an average diameter of 70{+-}10 nm obtained by TEM images.},
doi = {},
url = {https://www.osti.gov/biblio/21043914}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 3,
volume = 181,
place = {United States},
year = {Sat Mar 15 00:00:00 EDT 2008},
month = {Sat Mar 15 00:00:00 EDT 2008}
}