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dc.contributor.authorYao, Yunjin.
dc.contributor.authorMiao, S.
dc.contributor.authorYu, S.
dc.contributor.authorLi, Ping
dc.contributor.authorSun, Hongqi
dc.contributor.authorWang, Shaobin
dc.identifier.citationYao, Y. and Miao, S. and Yu, S. and Li, P. and Sun, H. and Wang, S. 2012. Fabrication of Fe3O4/SiO2 core/shell nanoparticles attached to graphene oxide and its use as an adsorbent. Journal of Colloid and Interface Science. 379 (1): pp. 20-26.

Amino-functionalized Fe3O4/SiO2 core/shell nanoparticles were synthesized by reacting Fe3O4 nanoparticles with tetraethyl orthosilicate and (3-aminopropyl) triethoxysilane to introduce amino groups on the surface. The amino groups on the Fe3O4/SiO2 were reacted with the carboxylic groups of graphene oxide (GO) with the aid of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinnimide to form Fe3O4/SiO2––GO nanoparticles. The structural, surface, and magnetic characteristics of the material were investigated by scanning and transmission electron microscopy, energy-dispersive X-ray spectrometry, powder X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Adsorption equilibrium and kinetics of methylene blue on the Fe3O4/SiO2––GO were studied in a batch system. The maximum adsorption capacities were found to be 97.0, 102.6, and 111.1 mg g−1 at 25, 45, and 60 °C, respectively. A second-order kinetic equation could best describe the sorption kinetics. Thermodynamic parameters indicated that the adsorption of methylene blue onto the material was thermodynamically feasible and could occur spontaneously.

dc.publisherAcademic Press
dc.subjectFe3O4/SiO2 core/shell nanoparticle
dc.subjectMethylene blue
dc.titleFabrication of Fe3O4/SiO2 core/shell nanoparticles attached to graphene oxide and its use as an adsorbent
dc.typeJournal Article
dcterms.source.titleJournal of Colloid and Interface Science
curtin.departmentDepartment of Chemical Engineering
curtin.accessStatusFulltext not available

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