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Preparation and Characterization of 3D Flower-like La2O3 Nanostructures

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In this work, a facile route using a simple solvothermal reaction and sequential heat treatment process to prepare 3D La2O3 flower-like nanostructures without employing templates or matrices for self-assembly is presented. The as-synthesized products were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), highresolution TEM (HRTEM), energy dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TG), differential thermal analysis (DTA), and Fourier transformation IR (FTIR). SEM results demonstrate that the as-prepared flower-like precursor with average size of 5- 7 μm in diameter is composed of numerous nanoplates with a thickness of about 100 nm. Influencing factors such as solvothermal reaction temperature, surfactants, reaction time, and solvents were systematically investigated. 3D flower-like La2O3 nanostructures with many holes on the petals were obtained after calcinations of the flower-like precursor at 800 °C for 4 h. The BET surface area of the flower-like La2O3 nanostructures is 9.98 m2/g. Eu3+ doped flower-like La2O3 nanostructures were also prepared employing the same preparation process. The flower-like La2O3:Eu3+ nanostructures show a strong red emission corresponding to 5D0 -7F2 transition (625 nm) of Eu3+ under ultraviolet excitation (267 nm). The possible formation mechanism for the 3D flower-like precursor was briefly discussed.

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Keywords: Characterization; flower-like; lanthanum oxide; nanomaterials; nanostructures; photoluminescence; porous; rare earth; self-assembly; solvothermal synthesis

Document Type: Research Article

Publication date: June 1, 2011

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  • Current Nanoscience publishes authoritative reviews and original research reports, written by experts in the field on all the most recent advances in nanoscience and nanotechnology. All aspects of the field are represented including nano- structures, synthesis, properties, assembly and devices. Applications of nanoscience in biotechnology, medicine, pharmaceuticals, physics, material science and electronics are also covered. The journal is essential to all involved in nanoscience and its applied areas.
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