Jump to main content
Jump to site search


Reaction study of α-phase NaYF4:Yb,Er generation via a tubular microreactor: discovery of an efficient synthesis strategy

Author affiliations

Abstract

α-Phase NaREF4 is the necessary intermediate to obtain β-phase NaREF4, which is good at upconversion luminescence. We herein report microreaction research on the generation of α-NaYF4:Yb,Er nanoparticles. Owing to the fast heating and cooling ability of a quartz microreactor, α-NaYF4:Yb,Er was successfully generated within a reaction time of <10 min. The results showed that it was difficult to complete the α-NaYF4:Yb,Er generation reaction in such a short reaction time by using the traditional synthetic route with a precursor solution containing NaF. However, as we changed the precursor to a solution containing amorphous NaREF4, the yield of α-NaYF4:Yb,Er increased to 95%. By focusing on applying the new precursor solution, we investigated the influence of the reaction temperature on the morphology of α-NaYF4:Yb,Er and exhibited the effects of size and crystallinity of α-NaYF4:Yb,Er on the generation of β-NaYF4:Yb,Er. Finally, an improved microreaction system with an in-line mixing of NH4REF4 and NaOA solutions was developed, whose products were successfully converted to uniform β-NaYF4:Yb,Er nanocrystals through the Ostwald-ripening process. The new reaction path and the reaction device further opened a door for the highly efficient synthesis of upconversion luminescent nanoparticles.

Graphical abstract: Reaction study of α-phase NaYF4:Yb,Er generation via a tubular microreactor: discovery of an efficient synthesis strategy

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 Dec 2018, accepted on 28 Mar 2019 and first published on 29 Mar 2019


Article type: Paper
DOI: 10.1039/C8NR09957J
Citation: Nanoscale, 2019, Advance Article

  •   Request permissions

    Reaction study of α-phase NaYF4:Yb,Er generation via a tubular microreactor: discovery of an efficient synthesis strategy

    D. Liu, Y. Jing, K. Wang, Y. Wang and G. Luo, Nanoscale, 2019, Advance Article , DOI: 10.1039/C8NR09957J

Search articles by author

Spotlight

Advertisements