Fabrication of Octahedral-Shaped Polyol-Based Zinc Alkoxide Particles and Their Conversion to Octahedral Polycrystalline ZnO or Single-Crystal ZnO Nanoparticles

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• 作者：Jingwei Zhang ; Pengli Zhu ; Jiuhe Li ; Jianmin Chen ; Zhishen Wu ; Zhijun Zhang
• 刊名：Crystal Growth & Design
• 出版年：2009
• 出版时间：May 6, 2009
• 年：2009
• 卷：9
• 期：5
• 页码：2329-2334
• 全文大小：283K
• 年卷期：v.9,no.5(May 6, 2009)
• ISSN：1528-7505

文摘

An ultrasonically assisted two-step polyol process was established to prepare a novel ethylene glycol-based zinc alkoxide with octahedral morphology. The octahedral-shaped zinc alkoxide particles could be converted to ZnO by heating to 350 °C or above, without altering the octahedral shape. Interestingly, when exposed to atmospheric moisture at room temperature for more than 48 h, the octahedral zinc alkoxide was in situ transformed to single-crystal ZnO nanoparticles via hydrolysis in the octahedral configuration, accompanied by release of ethylene glycol. The morphology, composition, and phase structure of the glycol-based zinc alkoxide and the resulting products, i.e., octahedral ZnO polycrystalline particles and single-crystal ZnO nanoparticles, were characterized by means of scanning electron microscopy (SEM), Fourier transformation infrared spectrometry (FTIR), X-ray diffraction (XRD), thermal analysis (TA), elemental analysis (EA), and transmission electron microscopy (TEM). The present approach for octahedral polycrystalline ZnO or spherical single-crystal ZnO nanoparticles would provide a potential facile route to fabricating other metal oxides with controllable morphology. The hydrolysis of the octahedral zinc alkoxide might be used to facilitate slow release of ethylene glycol, a common compound for lowering freezing point.