Fabrication of Fe3O4/SiO2 core/shell nanoparticles attached to graphene oxide and its use as an adsorbent
MetadataShow full item record
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.
Showing items related by title, author, creator and subject.
Acetone adsorption to (BeO)<inf>12</inf>, (MgO)<inf>12</inf> and (ZnO)<inf>12</inf> nanoparticles and their graphene composites: A density functional theory (DFT) studyMo, Y.; Li, H.; Zhou, K.; Ma, X.; Guo, Y.; Wang, Shaobin; Li, L. (2019)© 2018 Elsevier B.V. Acetone, one of the most common VOCs, could cause serious air pollution and threat the human health when someone is exposed to certain concentration of acetone. Thereof, acetone detection and elimination ...
Feng, C.; Aldrich, C.; Eksteen, J.; Arrigan, Damien (2017)© 2017 Canadian Institute of Mining, Metallurgy and Petroleum Arsenic adversely affects gold mining operations by interfering with the extraction of gold, as well as posing a significant health and environmental hazard. ...
Cr(OH)<inf>3</inf>-NPs-CNC hybrid nanocomposite: a sorbent for adsorptive removal of methylene blue and malachite green from solutionsNekouei, F.; Nekouei, S.; Keshtpour, F.; Noorizadeh, H.; Wang, Shaobin (2017)© 2017 Springer-Verlag GmbH Germany In this article, Cr(OH) 3 nanoparticle-modified cellulose nanocrystal (CNC) as a novel hybrid nanocomposite (Cr(OH) 3 -NPs-CNC) was prepared by a simple procedure and used as a sorbent ...