Facile Synthesis of Lanthanide (Ce, Eu, Tb, Ce/Tb, Yb/Er, Yb/Ho, and Yb/Tm)‐Doped LnF3 and LnOF Porous Sub‐Microspheres with Multicolor Emissions. Issue 23 (7th November 2017)

• Record Type: Journal Article
• Authors: Zhao, Shuang; Shao, Baiqi; Feng, Yang; Yuan, Senwen; Huo, Jiansheng; Lü, Wei; Liu, Kai; You, Hongpeng
• Is Part Of: Chemistry, an Asian journal. Volume 12:Issue 23(2017)
• Page Start: 3046
• Page End: 3052
• Publication Date: 2017-11-07
• Subjects: fluorides -- lanthanides -- luminescence -- porous spheres -- template synthesis; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.201701142
• Languages: English
• ISSNs: 1861-4728

Abstract

Abstract: Monodisperse YF3 and YOF porous sub‐microspheres were synthesized by using a novel sacrificing template method with amorphous Y(OH)CO3 ⋅ x H2 O as the precursors and the template. It was found that the size and shape were well maintained, and the condensed precursor was transformed into uniform porous structures after fluoridation. By fine‐tuning the feed of the fluorine source, the final product could be converted from YF3 to YOF. A possible growth mechanism is proposed for the uniform porous YF3 structure and the porous yolk–shell‐like YOF structure. The luminescence properties showed that the as‐synthesized YF3 :Ln 3+ (Ln=Eu, Tb, Ce, Ce/Tb, Yb/Er, Yb/Ho, and Yb/Tm) products exhibited strong multicolor emissions, which included down‐/upconversion and energy‐transfer processes. Additionally, YOX (X=Cl and Br) could be obtained if a different halogen source was used during calcination. However, the spheres were almost completely destroyed. Our novel synthetic route can also be extended to other lanthanide fluorides (REF3, RE=Gd, Lu), which may open a facile way to fabricate novel porous nanostructures. Abstract : A great sacrifice : A facile method was developed to synthesize monodisperse porous YF3 and YOF spheres, with great differences in the obtained pore structures. The method is available for other lanthanide fluorides; YOCl and YOBr were also successfully obtained by using the same method. Notably, the YF3 :Ln 3+ products showed intense down‐/upconverting luminescence emissions.