Journal
CRYSTENGCOMM
Volume 19, Issue 43, Pages 6498-6505Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ce01418j
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Funding
- National Natural Science Foundation of China [51573023, 50972020]
- Natural Science Foundation of Jilin Province of China [20170101101JC]
- Industrial Technology Research and Development Project of Jilin Province Development and Reform Commission [2017C051]
- Science and Technology Research Planning Project of the Education Department of Jilin Province during the 13th Five-Year Plan Period [JJKH20170608KJ]
- Youth Foundation of Changchun University of Science and Technology [XQNJJ-2016-01]
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La2O2CN2 and La2O2CN2:RE3+ (RE = Eu, Dy, Tb, Tm, and Yb/Er) complexes with special morphologies, having uniform rod-like, umbrella-like, cauliflower-like and mushroom-like microarchitectures, have been successfully synthesized by combining a simple hydrothermal route with cyanamidation technology. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectra (EDX), and photoluminescence (PL) spectra were used to characterize the samples. The morphology regulation of the products was realized via simply adjusting a series of experimental parameters, including sodium citrate amount, reaction temperature and pH value of the initial solution; the growth mechanisms have been proposed. Under ultraviolet light excitation, the as-obtained La2O2CN2:RE3+ (RE = Eu, Dy, Tb, Tm) products successfully exhibit downconversion emissions showing different fluorescence colors based on the characterized transitions of different rare earth ions. Additionally, upon 980 nm laser excitation, La2O2CN2: Yb/Er phosphors have strong upconversion emissions. La2O2CN2 microstructures are therefore excellent matrixes, and the as-synthesized La2O2CN2:RE3+ samples have potential applications in fluorescent lamps, field emission displays, biological labeling and catalysis.
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