One-Step Aqueous Solvothermal Synthesis of In2O3 Nanocrystals

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• 作者：Jun Yang ; Chunxia Li ; Zewei Quan ; Deyan Kong ; Xiaoming Zhang ; Piaoping Yang ; Jun Lin
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：February 2008
• 年：2008
• 卷：8
• 期：2
• 页码：695 - 699
• 全文大小：1496K
• 年卷期：v.8,no.2(February 2008)
• ISSN：1528-7505

文摘

Highly crystalline and nearly monodisperse In₂O₃ nanocrystals with both cube and flower shapes were successfully synthesized in one step through a facile aqueous solvothermal method for the first time, free of any surfactant or template. X-ray diffraction (XRD), transmission electron microscopy (TEM), selective area electron diffraction (SAED), and high-resolution transmission electron microscopy (HRTEM) were used to characterize the samples. In our work, the use of diethylene glycol (DEG) is a crucial factor for the formation of the In₂O₃ phase. CO(NH₂)₂ and a defined amount of water play important roles in the formation of the In₂O₃ with different nanostructures. Detailed formation mechanisms for the In₂O₃ phase have been proposed on the hydrolysis of indium alkoxide complexes at elevated temperature in DEG solutions, and the general growth mechanisms for the In₂O₃ nanostructures have been discussed. Compared with nonaqueous solvothermal synthesis of In₂O₃, we present a simple aqueous synthesis method by combining a hydrothermal process with a polyol method.