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Erschienen in:
17.06.2016
Size-controlled synthesis of BiFeO3 nanoparticles by a facile and stable sol–gel method
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 10/2016
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Abstract
Bismuth ferrite (BiFeO3) acting as a significant multiferroic material exhibits unique magnetic and ferroelectric properties. Here we report the size-controlled synthesis of BiFeO3 nanoparticles via a facile and stable Pechini sol–gel method, in which uses tartaric acid as a complexing agent, ethylene glycol as a polymerizing agent. It is found that the nanoparticle size is sensitive to the gel-forming temperature. The nanoparticles with size as small as 30 nm have been obtained. A sequential reaction process and the mechanism of size controllable growth of BiFeO3 has been presented. The effects of size on optical and magnetic properties have been also investigated. The decreasing particles lead to blue shift in the band gap. BiFeO3 nanoparticles show weak ferromagnetic character due to a Fe3+ oxidation state, and the magnetization increases with decrease in the particle size.