Mixed-solvent strategy for solvothermal synthesis of well-dispersed YBO3:Ce3+,Tb3+ nanocrystals

Akihiro Nohara, Satoru Takeshita, Tetsuhiko Isobe

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20 Citations (Scopus)


We investigated the influence of the composition of a 1,4-butanediol-water mixed solvent on the structural and particulate properties in the synthesis of well-dispersed YBO3:Ce3+,Tb3+ nanocrystals, without assembly, using a solvothermal method. YBO3:Ce 3+,Tb3+ nanocrystals were synthesized from trimethyl borate and acetates of yttrium, cerium(iii), and terbium(iii) via a solvothermal reaction at 250 °C for 6 h in the mixed solvent. The presence of water promoted YBO3 crystallization. The size of the primary nanocrystals increased from ∼5 to ∼40 nm as the water content of the mixed solvent increased from 2.5 to 100 vol%. The primary nanocrystals formed disk-like secondary assembled particles for water contents below 75 vol%, but formed polyhedral secondary particles in pure water. In contrast, well-dispersed primary nanocrystals with a mean hydrodynamic size of ∼35 nm were obtained when the water content was 75 vol%. These results indicate that not only the size of the primary nanocrystals, but also their assembly can be controlled by changing the composition of the mixed solvent. The obtained well-dispersed nanocrystals were transparent to the naked eye and showed green photoluminescence corresponding to 4f → 4f transitions of Tb3+ by energy transfer from Ce3+ to Tb3+ under near-UV irradiation.

Original languageEnglish
Pages (from-to)11219-11224
Number of pages6
JournalRSC Advances
Issue number22
Publication statusPublished - 2014 Feb 28

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


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