Size-controlled synthesis of BiFeO₃ nanoparticles by a facile and stable sol–gel method

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• 作者：Ben Qin ; Yiping Guo ; Di Pan ; Chongyang Sun…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：27
• 期：10
• 页码：10803-10809
• 全文大小：1,454 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X
• 卷排序：27

文摘

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.