Synthesis of Eu3+-doped Gd2O3 in hollow nanoparticle structures by controlled chemical etching with poly(acrylic acid)

Facile fabrication of hollow mesoporous Eu 3+ -doped Gd 2 O 3 nanoparticles for dual-modal imaging and drug delivery

“…For Eu 3+ -doped Gd 2 O 3 HMNPs, the band around 1500 cm -1 attributed to -COO -stretching vibration almost disappeared, confirming that the PAAS templates have been removed successfully from the obtained HMNPs.In addition, the peak appeared at 550 cm -1 which results from the Gd-O vibration of cubic Gd 2 O 3 is obviously found from the curve of Eu 3+ -doped Gd 2 O 3 HMNPs[43].The aforementioned results strongly suggest that the PAA@Gd(OH)3 /Eu(OH) 3 precursors have successfully converted to Eu 3+ -doped Gd 2 O 3 HMNPs during the (curve b), which further affirm the transformation from amorphous PAA@Gd(OH) 3 /Eu(OH) 3 precursors to highly crystalline Eu 3+ -doped Gd 2 O 3 HMNPs. Furthermore, all peaks of the resulting HMNPs match well with the reported values for cubic Gd 2 O 3 crystal (JCPDS No.43-1014)[44]. The energy dispersive X-ray spectroscopy (EDX) results, as shown inFigure S1, display that the main elemental compositions of the nanocomposite are Eu and Gd.…”

A pH-Responsive Yolk-Like Nanoplatform for Tumor Targeted Dual-Mode Magnetic Resonance Imaging and Chemotherapy

“…As shown in Figure 3a, YFGN displayed obvious X-ray diffraction (XRD) peaks of the spinel-structure of Fe 3 O 4 and amorphous Gd 2 O 3 , 33,34 confirming the existence of Fe 3 O 4 and Gd 2 O 3 in YFGN. In addition, compared to original Fe 3 O 4 , the diffraction peak of Fe 3 O 4 in YFGN weakened, which could be assigned to the coverage from Gd 2 O 3 shell.…”

Template-free hydrothermal synthesis of Gd2O2SO4:Eu3+ hollow spheres based on urea-ammonium sulfate (UAS) system

“…At present, most of the systems reported for the formation of hollow spheres were based on template-assisted processes, which often employ sacrificial template (hard or soft templates) to obtain hollow spheres. It should be mentioned that the removal of the sacrificial template may cause environmental problems as a result of the product of calcinations [11] or the etching agents [12].…”