Abstract
Uniform gadolinium oxysulfate (Gd2O2SO4) hollow spheres were successfully fabricated by calcination of corresponding Gd-organic precursor obtained via a facile hydrothermal process. The Gd2O2SO4 hollow spheres have a mean diameter of approximately 550 nm and shell thickness in the range of 30–70 nm. The sizes and morphologies of as-prepared Gd2O2SO4 hollow spheres could be deliberately controlled by adjusting the experimental parameters. Eu-doped Gd2O2SO4 hollow spheres have also been prepared for the property modification and practical applications. The structure, morphology, and properties of as-prepared products were characterized by XRD, TEM, HRTEM, SEM and fluorescence spectrophotometer. Excited with ultraviolet (UV) pump laser, successful downconversion (DC) could be achieved for Eu-doped Gd2O2SO4 hollow spheres.
Highlights
For Gd2O2SO4, due to its unique half-filled outer electron shell in rare-earth elements, it is promising in combining magnetic and luminescent properties
The thermal decomposition behaviors of Gd-organic precursor was investigated in the temperature range of 25–650 °C at a heating rate of 10 °C min−1 in air
As shown in the TG curve, little weight change can be observed at temperatures higher than 600 °C, suggesting that the relatively stable compound was obtained
Summary
For Gd2O2SO4, due to its unique half-filled outer electron shell in rare-earth elements, it is promising in combining magnetic and luminescent properties. A peculiar hollow structure further endows Gd2O2SO4 to be www.nature.com/scientificreports/. A multifunctional nanomaterial for biomedical applications, such as magnetic resonance imaging, drug delivery host carriers and diagnostic analysis. This brings far-reaching impact than the availability of Y2O2SO4 hollow structure. The size and morphology of as-prepared Gd2O2SO4 hollow spheres can be deliberately controlled by adding different surfactants with varied amount. Eu-doped Gd2O2SO4 hollow spheres have been successfully synthesized and the luminescence properties of as-prepared products were studied in detail
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