Solvothermal synthesis of mesoporous magnetite nanoparticles for Cr(IV) ions uptake and microwave absorption
Type
ArticleKAUST Department
Imaging and Characterization Core LabMaterial Science and Engineering Program
Nanofabrication Core Lab
Physical Science and Engineering (PSE) Division
Thin Films & Characterization
Date
2016-05-12Online Publication Date
2016-05-12Print Publication Date
2016-05Permanent link to this record
http://hdl.handle.net/10754/621580
Metadata
Show full item recordAbstract
Abstract: Colloidal mesoporous magnetite nanoparticles with tunable porosity were realized by a simple and scalable solvothermal route with the aid of AOT as ligands. AOT was used to induce the anisotropic crystal growth of smaller nanocrystals and restrain their tight aggregation so as to form more mesoscale pores. Morphologies and microstructures investigation by SEM and TEM revealed that the bigger nanoparticles were composed of smaller nanocrystals with an average size of 18 nm. A possible formation mechanism was proposed for the mesoporous nanoparticles. Study of nitrogen adsorption–desorption isotherm revealed that the Brunauer–Emmett–Teller (BET) specific surface area of mesoporous nanoparticles is up to 209 m2/g, resulting from the slit-shaped pores created by the aggregation of polyhedral nanocrystals. Magnetic properties study indicated that the as-prepared nanoparticles are superparamagnetic at room temperature. Optimized mesoporous magnetite nanoparticles exhibit a maximum Cr(VI) ion sorption capacity of 12.9 mmol/g, and its absorption behavior followed a Freundlich model. Microwave absorption study indicated that porous nanoparticles own higher permeability values than that of solid nanoparticles, leading to a higher dielectric loss in the frequency range of 2–18 GHz. Graphical Abstract: [Figure not available: see fulltext.] © 2016, Springer Science+Business Media Dordrecht.Citation
Shen P, Zhang H, Zhang S, Yuan P, Yang Y, et al. (2016) Solvothermal synthesis of mesoporous magnetite nanoparticles for Cr(IV) ions uptake and microwave absorption. J Nanopart Res 18. Available: http://dx.doi.org/10.1007/s11051-016-3442-x.Sponsors
This work was financially supported by the National Natural Science Foundation of China (Nos. 21271175, 21127011), National Key Basic Research Program of China (or 973 Program, No. 2014CB239701), One Hundred Talent Program (CAS), and Instrument and Equipment Research and Development Project (No. YZ201221) for HTZ. The authors declare that they have no conflict of interest.Publisher
Springer NatureJournal
Journal of Nanoparticle Researchae974a485f413a2113503eed53cd6c53
10.1007/s11051-016-3442-x