Interaction of Alkaline Metal Cations with Oxidic Surfaces: Effect on the Morphology of SnO2 Nanoparticles

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• 作者：Alexander Birkel ; Niklas Loges ; Enrico Mugnaioli ; Robert Branscheid ; Dominik Koll ; Stefan Frank ; Martin Panthfer ; Wolfgang Tremel
• 刊名：Langmuir
• 出版年：2010
• 出版时间：March 2, 2010
• 年：2010
• 卷：26
• 期：5
• 页码：3590-3595
• 全文大小：988K
• 年卷期：v.26,no.5(March 2, 2010)
• ISSN：1520-5827

文摘

Reaction pathways to SnO₂ nanomaterials through the hydrolysis of hydrated tin tetrachloride precursors were investigated. The products were prepared solvothermally starting from hydrated tin tetrachloride and various (e.g., alkali) hydroxides. The influence of the precursor base on the final morphology of the nanomaterials was studied. X-ray powder diffraction (XRD) data indicated the formation of rutile-type SnO₂. Transmission electron microscopy (TEM) studies revealed different morphologies that were formed with different precursor base cations. Data from molecular dynamics (MD) simulations provide theoretical evidence that the adsorption of the cations of the precursor base to the faces of the growing SnO₂ nanocrystals is crucial for the morphology of the nanostructures.