Enhancement of fluorescence and magnetic properties of CeF3:RE3+ (Tb, Gd) nanoparticles via multi-band UV excitation and Li doping regulation. Issue 12 (15th June 2021) - Yang, Weiling
Abstract: In this study, hydrothermal synthesis of CeF3 : Tb, Gd nanoparticles doped with Li + alkali metal ions were demonstrated using introduction of Li + ions through LiNO3 nitrate. These nanoparticles have dual properties of magnetic fluorescence. X-ray diffraction, Fourier transform infrared spectrometer, XPS and photoluminescence spectra, and vibrating sample magnetometry were used to characterize structural properties, surface functional groups, fluorescence, and magnetic properties of these particles. Results show that CeF3 : Tb, Gd nanoparticles exhibit bright green light emission under excitation at 258 nm and 378 nm ultraviolet band. Through the modification of Li + ions, luminous intensity of green light is further improved. Energy transfer between rare earth ions was investigated via photoluminescence spectroscopy. This work demonstrates potential applications of Li doped CeF3 : Tb, Gd nanoparticles as photomagnetic dual-functional materials in fields of biological imaging, solid state lighting, and magnetic biological separation. Graphical abstract: In this paper, hydrothermal synthesis of CeF3 : Tb, Gd nanoparticles doped with Li + alkali metal ions. These nanoparticles have dual properties of magnetic fluorescence. X-ray diffraction, Fourier transform infrared spectrometer, XPS and photoluminescence spectra, and vibrating sample magnetometry were used to characterize structural properties, surface functional groups, fluorescence, and magnetic properties of these particles. Results show that CeF3 : Tb, Gd nanoparticles exhibit bright green light emission under excitation at 258 nm and 378 nm ultraviolet band. Through the modification of Li + ions, luminous intensity of green light is further improved. Energy transfer between rare earth ions was investigated via photoluminescence spectroscopy. This work demonstrates potential applications of Li + doped CeF3 : Tb, Gd nanoparticles as photomagnetic dual-functional materials in fields of biological imaging, solid state lighting, and magnetic biological separation. Fig. 1 CeF3 : Tb, Gd nanoparticles exhibit bright green light emission under UV excitation. Through the modification of Li + ions, luminous intensity of green light is further improved. Image 1 Highlights: In this study, hydrothermal synthesis of Tb, Gd: CeF3 nanoparticles doped with Li alkali metal ions have been successfully. Green emission peaks intensities are improved with increasing of Li ions, at 258 nm and 378 nm as excitation wavelengths. CeF3 nanoparticles doped with 20 mol% Tb 3+ ions and 9 mol% Gd 3+ ions exhibit the maximum luminescence intensity. As the Gd 3+ ion doping concentration reaches 11 mol%, the magnetization at 20000Oe reaches 0.0623emu/g.