Facile Synthesis and Fine Morphological Tuning of Ag2O

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• 作者：Myeong-Jin Kim ; Young-Sik Cho ; Seong-Hun Park ; Young-Duk Huh
• 刊名：Crystal Growth & Design
• 出版年：2012
• 出版时间：August 1, 2012
• 年：2012
• 卷：12
• 期：8
• 页码：4180-4185
• 全文大小：486K
• 年卷期：v.12,no.8(August 1, 2012)
• ISSN：1528-7505

文摘

The morphological evolution of the Ag₂O cubic crystal system was examined with the goal of controlling and fine-tuning the morphologies of the microcrystalline products. A variety of Ag₂O microcrystalline shapes could be prepared through the reduction of a silver-pyridine complex in solution at room temperature. The concentrations NaOH and AgNO₃ significantly affected the morphology of the Ag₂O final product. The Ag₂O morphology evolved from a simple truncated cube to an 8-pod with three arms along the 111 directions as the concentration of NaOH increased. The Ag₂O morphology evolved from an edge-truncated cube to a rhombic dodecahedron as the total reactant concentrations increased, holding the AgNO₃/pyridine/NaOH molar ratio constant. The morphological evolution from an 8-pod to a rhombic dodecahedron via an 8 脳 3-pod, a 6 脳 4-pod, a smoothed squared 6-pod, a concave rhombic dodecahedron, and a truncated rhombic dodecahedron was also observed. The crystal growth mechanism underlying the morphological evolution of Ag₂O microcrystals is discussed.