4.7 Article

Ultrafast Microwave Hydrothermal Synthesis of BiFeO3 Nanoplates

Journal

JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 96, Issue 10, Pages 3155-3162

Publisher

WILEY-BLACKWELL
DOI: 10.1111/jace.12473

Keywords

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Funding

  1. Canada Foundation for Innovation
  2. China Scholarship Council (CSC)
  3. FQRNT
  4. NSERC
  5. Canada Research Chairs program
  6. MDEIE
  7. NSERC for a CGS fellowship

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We report the synthesis of {100}(c) facets exposed single-crystalline BiFeO3 (BFO) nanoplates, with thickness ranging from 20 to 160nm and lateral size of submicrometers, via a simple and very rapid (1-2min) microwave-assisted hydrothermal approach. We show that the microwave treatment gives comparable improvement in crystallinity of BFO nanocrystals with respect to traditional hydrothermal processes while requiring significantly less time and energy. In addition, we show that microwave radiation power, reaction time, and alkali concentration play important roles in the crystallinity and morphology of the products. We discuss a possible formation mechanism of the nanoplates based on our experimental results. Additionally, the BFO nanoplates exhibit weak ferromagnetic properties at room temperature, which we attribute to the size-confinement effect on magnetic ordering. The present microwave hydrothermal method has great potential in large-scale fabrication of BFO nanomaterials as well as other composite functional materials due to significantly reduced time and energy.

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