Synthesis of Three-Dimensional Hierarchical Dendrites of NdOHCO3 via a Facile Hydrothermal Method

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• 作者：Xingfu Shang ; Wencong Lu* ; Baohua Yue ; Liangmiao Zhang ; Jipeng Ni ; Yong lv ; Yongli Feng
• 刊名：Crystal Growth & Design
• 出版年：2009
• 出版时间：March 4, 2009
• 年：2009
• 卷：9
• 期：3
• 页码：1415-1420
• 全文大小：373K
• 年卷期：v.9,no.3(March 4, 2009)
• ISSN：1528-7505

文摘

Dentritic neodymium hydroxycarbonate NdOHCO₃ nanostructures have been successfully prepared using a facile hydrothermal approach, by the reaction of neodymium nitrate and ammonium hydrogen carbonate without the assistance of any surfactants or templates. The influences of the ratio of neodymium nitrate/ammonium hydrogen carbonate, and different reaction times and temperatures have been discussed. The as-obtained superstructures are characterized by several techniques, such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and fluorescence spectra measurements. The three-dimensional (3D) dentritic NdOHCO₃ nanostructure is composed of one trunk with the diameter of about 50 nm and the length of about ca. 1−5 μm. And every branch is also a small dentritic nanostructure. The length of the secondary and tertiary sharp branches is about 300 nm to 2 μm and 100−300 nm, respectively. The photoluminescence (PL) spectra of the product shows an intensive band centered at about 388 nm. The relative peak intensity decreases as the reaction temperature increased and reaction time decreased. The possible formation mechanism of the 3D dentritic NdOHCO₃ superstructures is proposed and discussed.