Microemulsion-Mediated Solvothermal Synthesis of SrCO3 Nanostructures

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• 作者：Minhua Cao ; Xinglong Wu ; Xiaoyan He ; and Changwen Hu
• 刊名：Langmuir
• 出版年：2005
• 出版时间：June 21, 2005
• 年：2005
• 卷：21
• 期：13
• 页码：6093 - 6096
• 全文大小：303K
• 年卷期：v.21,no.13(June 21, 2005)
• ISSN：1520-5827

文摘

The controlled synthesis of SrCO₃ nanostructures with different morphologies, such as rodlike, whiskerlike,ellipsoidlike, and spherelike, were successfully achieved by the cationic surfactant-CTAB-microemulsion-mediated solvothermal method. Various comparison experiments showed that fundamental experimentalparameters, such as the molar ratio of H₂O to CTAB and the concentration of reactants, played importantroles in the morphological control of SrCO₃ nanostructures. A lower molar ratio of H₂O to CTAB favorsrodlike products, whereas a higher molar ratio generally leads to the formation of spherical products. Arational mechanism based on fusion, aggregate, and coalescence of microemulsion droplets is proposed forthe selective formation of various morphologies. X-ray powder diffraction (XRD), transmission electronmicroscopy (TEM), selected area electron diffraction (SAED), and field-emission scanning electron microscope(FE-SEM) were used to characterize the products.