6 February 2017 Paramagnetic anatase titania/carbon nanocomposites
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The nanocomposites comprising of anatase titania nanoparticles uniformly distributed inside the porous carbon matrix were synthesized using furfuryl alcohol, tetrabutyltitanate, and nonionic surfactant. The characterization of the nanocomposite by scanning electron microscopy, transmission electron microscopy, energy dispersive x-ray analysis, x-ray diffractometry, and Raman spectroscopy revealed the formation of anatase titania nanoparticles of average sizes 10 to 20 nm. The observed broadening and blueshift of the main Raman peak of titanium dioxide nanoparticles were explained using the phonon confinement effect. The nanocomposite exhibited strong paramagnetism at low temperatures and was diamagnetic at higher temperatures, as well as a small contamination by magnetic impurities was detected. The paramagnetism originated from the amorphous defect-rich carbon and oxygen vacancies in titania.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Ivan Zakharchuk, Ivan Zakharchuk, Anton A. Komlev, Anton A. Komlev, Ekaterina Soboleva, Ekaterina Soboleva, Tatiana L. Makarova, Tatiana L. Makarova, Dmitry A. Zherebtsov, Dmitry A. Zherebtsov, Damir M. Galimov, Damir M. Galimov, Erkki Lähderanta, Erkki Lähderanta, } "Paramagnetic anatase titania/carbon nanocomposites," Journal of Nanophotonics 11(3), 032505 (6 February 2017). https://doi.org/10.1117/1.JNP.11.032505 . Submission: Received: 1 November 2016; Accepted: 20 January 2017
Received: 1 November 2016; Accepted: 20 January 2017; Published: 6 February 2017

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