Synthesis of nife2o4 nanofibers by joint sol-gel and electrospinning technique
Putić, Lana S.
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In this study, electrospinning combined with sol-gel technique is applied in order to produce magnetic nickel ferrite (Ni-ferrite) nanofibers. The prepared Ni-ferrite gel was mixed with poly(vinylpyrrolidone) (PVP) solution which was used as a spinning aid to enable spinnability of the mixture. Structural and morphological characteristics of the asspun ferrite gel/PVP composite web structure and calcinated Ni-ferrite nanofibers were analyzed using scanning electron microscopy (SEM). Phase composition analysis was carried out by Fourier-transform infrared (FT-IR) spectroscopy, X-Ray diffraction analysis (XRD) and Fe-57 Mossbauer spectroscopy (MS). The obtained results suggest that the pure nanocrystalline NiFe2O4 dense mat to the almost coral-like structure of fibers with diameters ranging from hundreds of nanometers to few micrometers was obtained. The results of MS analysis revealed the existence of a crystallite size distribution within the material as well as the existence of a supe...rparamagnetic fraction with very small crystallite sizes ( lt 13nm). Magnetic behavior of the obtained material at elevated temperatures was also scrutinized using thermomagnetic measurements (TM) up to 800 degrees C.
Keywords:Ni-ferrite / sol-gel / electrospinning, nanofibers / thermomagnetic behavior
Source:Metallurgical & Materials Engineering, 2018, 24, 3, 173-180
- Savez inženjera metalurgije Srbije, Beograd
Funding / projects:
- info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/34011/RS// (RS-34011)
- info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45019/RS// (RS-45019)
- info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172037/RS// (RS-172037)