title: A facile approach to synthesize SiO2 · Re2O3 (Re = Y, Eu, La, Sm, Tb, Pr) hollow sphere and its application in drug release.
abstract: Multifunctional SiO2 · Re2O3 (Re = Y, Eu, La, Sm, Tb, Pr) hollow spheres (HSs) have been fabricated using an acidic Re3+ ion solution. Under ultraviolet radiation, functional HSs emit different colors of light according to the different rare-earth ions embedded into the shell of SiO2 hollow spheres. The as-prepared hollow capsules were characterized by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, Brunauer-Emmett-Teller method, scanning electron microscopy, and energy-dispersive spectrometry. Drug loading and release experiments have been carried out using SiO2 · Eu2O3 HSs that acted as drug carriers. The results demonstrate that the multifunctional HSs exhibit a high storage capacity and the ability of retaining drug stability and activity, which indicates that the as-synthesized fluorescent hollow capsules are a potential candidate as drug delivery materials.
authors.affiliation: Department of Chemistry, College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China. lizhihua2006@126.com.
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Li
authors.forename: Lin
authors.initials: L
authors.lastname: Zhu
authors.forename: Qian
authors.initials: Q
authors.lastname: Liu
authors.forename: Yu
authors.initials: Y
authors.lastname: Du
authors.forename: Feng
authors.initials: F
authors.lastname: Wang