Journal
ACS OMEGA
Volume 6, Issue 17, Pages 11348-11354Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.1c00332
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Funding
- Key Research Program of the Chinese Academy of Sciences [ZDRW-KT-2019-1-0202]
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This paper reported a dry synthesis and characterization of cerium tetrafluoride (CeF4) and cerium trifluoride (CeF3) nanoscale polycrystals, providing an alternative strategy for the synthesis of nanometer fluorides and serving as a reference for high-performance research on other nanometer fluorides. The NPs were synthesized by mixing and heating intermediate products and characterized through various techniques, revealing their structural properties and potential applications.
This paper reported a dry synthesis and characterization of cerium tetrafluoride (CeF4) and cerium trifluoride (CeF3) nanoscale polycrystals (NPs). The CeF4 NPs were spherical or flaky and approximately 10 +/- 2 nm in diameter. The CeF3 NPs were rod-shaped nanorods with a length of about 150 +/- 5 nm and a diameter of about 20 +/- 2 nm. The first step was to synthesize the intermediate product-(NH4)(4)CeF8 by mixing CeO2 and NH4HF2 at a molar ratio of 1:6 at 390 K. The structural characterization was analyzed by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). Then, (NH4)(4)CeF8 was heated in an argon gas flow to synthesize the CeF3 and CeF4 NPs. The products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). The properties of CeF3 and CeF4 NPs were further evaluated by transmission electron microscopy (TEM), selected area electron diffraction pattern (SAED), and high-resolution transmission electron microscopy (HRTEM). The findings provided an alternative strategy for the synthesis of nanometer fluorides, which could be a reference for high-performance research on other nanometer fluorides.
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