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通过层状六铌酸钾的选择性层间接枝和剥离制备的单层和双层有机改性纳米片。

Single- and double-layered organically modified nanosheets by selective interlayer grafting and exfoliation of layered potassium hexaniobate.

作者信息

Kimura Nanako, Kato Yumi, Suzuki Ryoko, Shimada Akira, Tahara Seiichi, Nakato Teruyuki, Matsukawa Kimihiro, Mutin P Hubert, Sugahara Yoshiyuki

机构信息

Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University , 3-4-1 Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan.

出版信息

Langmuir. 2014 Feb 4;30(4):1169-75. doi: 10.1021/la404223x. Epub 2014 Jan 24.

Abstract

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 (K4Nb6O17·3H2O) 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.

摘要

有机改性铌酸盐纳米片是设计先进杂化材料的有前途的构建单元。具有可控厚度和表面组成的纳米片对于基于纳米片材料的精确结构设计很重要。在这项工作中,通过将六铌酸钾(K4Nb6O17·3H2O)的A型和B型插层衍生物与苯基膦酸(PPA)进行层间接枝,然后在乙腈中超声剥离,选择性地制备了由苯基膦酸酯部分功能化的单层和双层铌酸盐纳米片。使用X射线衍射(XRD)、傅里叶变换红外(FTIR)和固态核磁共振光谱监测PPA的层间接枝,并通过原子力显微镜(AFM)测量剥离纳米片的厚度。通过将单层和双层纳米片掺入环氧基质中获得透明杂化膜。

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