Senwen YUAN
,
Lang ZHAO
,
Hongtao LI
应用化学
doi:10.11944/j.issn.1000-0518.2016.08.150396
New water-soluble magnetic and fluorescent Fe3O4@SiO2@ZrO2:Tb3+ nanocomposites(NCs) have been successfully synthesized through the in situ synthesized method. The morphology, size, phase, magnetic properties and fluorescent properties of as-synthesized nanoparticles(NPs) were well investigated by scanning electron microscopy(SEM), X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR), magnetometer, and photoluminescence(PL) spectra. The magnetic and fluorescent NPs consist of silica-coated Fe3O4 as the core and the ZrO2:Tb3+ as the shell exhibit superparamagnetism with the saturation magnetization of 36 emu/g and fluorescence properties with four emission bands peaked at approximately 494 nm(5D4→7F6), 549 nm(5D4→7F5), 587 nm(5D 4→7F4), and 625 nm(5D4→7F3) of Tb3+ ions. The bifunctional magnetic and fluorescence NCs will show potential applications in biomedical fields in the future.
关键词:
water-soluble
,
bifunctional
,
magnetic and fluorescent
