Synthesis of KNbO3 nanostructures by a microwave assisted hydrothermal method
Synthesis of KNbO3 nanostructures by a microwave assisted hydrothermal method
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DOI：
10.1016/j.matlet.2007.12.059
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发表时间：
2008-06
影响因子：
3
通讯作者：
A. J. Paula;R. Parra;M. A. Zaghete;J. Varela
中科院分区：
文献类型：
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作者：
A. J. Paula;R. Parra;M. A. Zaghete;J. Varela
KNbO_3的一维纳米结构引起了科学界的极大兴趣，主要是因为它们在纳米机电系统(NEMS)中具有广阔的应用前景。然而，由于自然倾向于形成非化学计量比的铌酸钾，KNbO_3结构的合成变得复杂。在此背景下，我们报道了在微波辅助水热合成(M-H)下，Nb2O5与KOH反应生成一维KNbO_3纳米结构的研究。这种合成方法的使用使得快速合成单晶粉末成为可能。利用扫描电子显微镜、透射电子显微镜和X射线衍射仪对产物进行了表征，确定了合成时间和反应物浓度对产物结构和形貌的影响。确定了有利于纳米纤丝结晶的条件为少量Nb2O5和较短的反应时间。
One-dimensional nanostructures of KNbO3have attracted a great interest in the scientific community, mainly because of their promising application as nanoelectromechanical systems (NEMS). However, the synthesis of KNbO3structures becomes complex due to the natural tendency to form non-stoichiometric potassium niobates. In this context, we report on the crystallization of one-dimensional KNbO3nanostructures through the reaction between Nb2O5and KOH under microwave-assisted hydrothermal synthesis (M-H). The use of this synthesis method made possible a very fast synthesis of singlecrystalline powders. Based on SEM, TEM and XRD characterizations, the influence of the synthesis time and the reactants concentration in the structure and morphology of the resultant KNbO3was established. The conditions that favor the crystallization of nanofingers were determined to be small amounts of Nb2O5and short reaction times.