Single- and Double-Layered Organically Modified Nanosheets by Selective Interlayer Grafting and Exfoliation of Layered Potassium Hexaniobate

详细信息    查看全文

• 作者：Nanako Kimura ; Yumi Kato ; Ryoko Suzuki ; Akira Shimada ; Seiichi Tahara ; Teruyuki Nakato ; Kimihiro Matsukawa ; P. Hubert Mutin ; Yoshiyuki Sugahara
• 刊名：Langmuir
• 出版年：2014
• 出版时间：February 4, 2014
• 年：2014
• 卷：30
• 期：4
• 页码：1169-1175
• 全文大小：400K
• ISSN：1520-5827

文摘

Organically modified niobate nanosheets are promising building blocks for the design of advanced hybrid materials. Nanosheets with controlled thickness and surface composition are important for precise structural design of the nanosheet-based materials. In this work, single-layered and double-layered niobate nanosheets functionalized by phenylphosphonate moieties were selectively prepared by interlayer grafting of A-type and B-type intercalation derivatives of potassium hexaniobate (K₄Nb₆O₁₇路3H₂O) with phenylphosphonic acid (PPA), followed by exfoliation by ultrasonication in acetonitrile. The interlayer grafting of PPA was monitored using X-ray diffraction (XRD), Fourier transform infrared (FTIR), and solid-state NMR spectroscopy, and the thicknesses of the exfoliated nanosheets were measured by atomic force microscopy (AFM). Transparent hybrid films were obtained by incorporating the single- and double-layered nanosheets into an epoxy matrix.