Journal of Materials Science

, Volume 54, Issue 3, pp 1948–1957 | Cite as

The critical role of alkali cations in synthesizing Bi5FeTi3O15 nanocrystals

  • Jifang Chen
  • Zhiang Li
  • Tong Chen
  • Dejuan Sun
  • Liu Liu
  • Min LiuEmail author
  • Yalin LuEmail author


Recently, BFTO compounds attract much attention due to their potential as single-phase multiferroic materials. However, it is still challenging to synthesize pure phase BFTO nanocrystals due to their structural and compositional complexity. In this article, BFTO nanocrystals were successfully synthesized by adopting MOH (M = Li+, Na+ and K+) as mineralizers, and the critical role of M+ ion is expatiated in detail. Based on the anion coordination polyhedron growth unit model, growth unit/OH/M+ core/shell capping layers would form during the syntheses process, and the outermost M+ layer can hinder the growth and formation of pure phase BFTO nanocrystals via the effective passivation beyond a certain critical concentration of M+, i.e., 0.5 M, 2.5 M and 0.5 M for LiOH, NaOH and KOH, respectively, proportional to 1/RM+ (the solvated cation radius) and \( {\text{K}}_{{\rm{D}}}^{{{\rm{MOH}}}} \) (the dissociation constant of MOH). The coefficient of \( {\text{R}}_{\text{Li + }} > {\text{R}}_{\text{Na + }} > {\text{R}}_{\text{K + }} \) and \( {\text{K}}_{\text{D}}^{\text{LiOH}} < {\text{K}}_{\text{D}}^{\text{NaOH}} < {\text{K}}_{\text{D}}^{\text{KOH}} \) results in the highest critical concentration of NaOH among all the MOH bases.



This work was supported by the Ministry of Science and Technology (2016YFA0400904, 2017YFA0402900), the External Cooperation Program of BIC, Chinese Academy of Sciences (211134KYSB20130017), Key Research Program of Chinese Academy of Sciences (KGZD-EW-T06)and the State Key Laboratory of Solidification Processing in NWPU (SKLSP201610).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Authors and Affiliations

  1. 1.CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefeiPeople’s Republic of China
  2. 2.Hefei National Laboratory for Physical Sciences at the MicroscaleHefeiPeople’s Republic of China
  3. 3.Synergetic Innovation Center of Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefeiPeople’s Republic of China
  4. 4.Hefei Physical Sciences and Technology CenterCAS Hefei Institutes of Physical SciencesHefeiPeople’s Republic of China
  5. 5.National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefeiPeople’s Republic of China

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