A simple and versatile solvothermal configuration to synthesize superparamagnetic iron oxide nanoparticles using a coaxial microwave antenna

Year: 2016

Authors: Spepi A., Duce C., Ferrari C., González Rivera J., Jaglicic Z., Domenici V., Pineider F., Tinč M. R.

Autors Affiliation: Univ Pisa, Dept Chem & Ind Chem, Via G Moruzzi 3, I-56124 Pisa, Italy; CNR, Natl Inst Opt INO, UOS Pisa, Via G Moruzzi 1, I-56124 Pisa, Italy; Univ Ljubljana, Fac Math & Phys, Jamova Cesta 2, Ljubljana 1000, Slovenia; Univ Florence, Dept Chem Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy.

Abstract: Magnetic iron oxide nanoparticles (IONs) with controllable physicochemical and magnetic properties were synthesized by a fast and simple solvothermal microwave (MW) assisted approach. The MW-assisted synthesis using a coaxial microwave antenna was carried out in different routes: (i) a fast one-step solvothermal approach, and (ii) a non-aqueous sol-gel system. This innovative configuration obtained IONs maghemite crystal phase, in a very short reaction time (from 5 to 15 min), with a small size (6 nm) and narrow particle size distribution. Magnetization as a function of the applied magnetic field revealed that all the samples showed superparamagnetisms, with a saturation magnetization ranging from 60 to 68 emu g(-1) (T = 300 K). TEM, XRD, FTIR, TG, and magnetic measurements were used to fully characterize the IONs. Not only did the proposed methodologies using the coaxial MW configuration produce IONs with similar or improved physicochemical and magnetic properties, but they also overcame the classical drawbacks of oven-type MW configurations.

Journal/Review: RSC ADVANCES

Volume: 6 (106)      Pages from: 104366  to: 104374

More Information: This work was supported by the projects PRIN 2010-2011 (No. 2010C4R8M8) and FIRB 2012 (No. RBFR12ETL5), funded by the Italian Ministry of University and Research, and by the project PRA_2015_0055 and PRA_2016_46 funded by the University of Pisa.
KeyWords: sol-gel synthesis; hydrogthermal synthesis; magnetic-properties; assisted synthesis; biomedical applications; thermal decomposition; sensing properties; anticancer agents; rapid synthesis; hematite
DOI: 10.1039/c6ra17513a

ImpactFactor: 3.108
Citations: 12
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