Synthesis of LaF{sub 3} nanosheets with high fluorine mobility investigated by NMR relaxometry and diffusometry
- Institute of Chemistry of St. Petersburg State University 198504, Universitetsky pr., 26 Peterhof, St. Petersburg (Russian Federation)
- Institut für Festkörperphysik, Technische Universität Darmstadt, Hochschulstr. 6, 64289 Darmstadt (Germany)
Ionically conducting lanthanum fluoride (LaF{sub 3}), displaying a nanoscopic lamellar structure, has been synthesized at the surface of an aqueous solution of LaCl{sub 3} and HF. The structure and the chemical composition of the conductor have been analyzed by SEM, electron probe microanalysis, X-ray powder diffraction, FTIR, and {sup 19}F magic angle spinning nuclear magnetic resonance (NMR) spectroscopy. The fluorine dynamics have been studied by NMR diffusometry and relaxometry in a temperature range from room temperature up to 875 K. The fluorine self-diffusion coefficient of the nanostructured LaF{sub 3} is about two orders of magnitude larger than that of bulk LaF{sub 3}. This novel material is highly promising for many typical applications of fluorine ionic systems.
- OSTI ID:
- 22493352
- Journal Information:
- Journal of Chemical Physics, Vol. 143, Issue 23; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
AQUEOUS SOLUTIONS
CHEMICAL COMPOSITION
ELECTRON MICROPROBE ANALYSIS
FLUORINE
FLUORINE 19
FOURIER TRANSFORMATION
HYDROFLUORIC ACID
INFRARED SPECTRA
LANTHANUM CHLORIDES
LANTHANUM FLUORIDES
MOBILITY
NANOSTRUCTURES
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
SCANNING ELECTRON MICROSCOPY
SELF-DIFFUSION
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION