Oversized titania nanosheet crystallites derived from flux-grown layered titanate single crystals

被引：217

作者：

Tanaka, T ^{[1
]}

Ebina, Y ^{[1
]}

Takada, K ^{[1
]}

Kurashima, K ^{[1
]}

Sasaki, T ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 305044, Japan

来源：

CHEMISTRY OF MATERIALS | 2003年 / 15卷 / 18期

关键词：

D O I：

10.1021/cm034307j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This paper reports on the synthesis and characterization of oversized titania nanosheets derived from single crystals of a potassium lithium titanate, K0.8Ti1.73Li0.27O4. The single crystals with a lateral size of over 1 mm were obtained via a melt and recrystallization process in a flux melt. The crystals were converted into an acid-exchanged form of H1.07Ti1.73O4.H2O, and then was reacted with aqueous tetrabutylammonium (TBA) ions at various concentrations. X-ray diffraction analysis revealed that the titanate crystals exhibited high degrees of swelling, and exfoliated single sheets were obtained at a molar TBA dose of 0.5-1 with respect to the exchangeable protons in H1.07Ti1.73O4.H2O. Observations by transmission electron microscopy and atomic force microscopy detected very large nanosheet crystallites with a lateral size of several tens of micrometers. Some wrinkles and cracks within the crystallites indicated that they were highly flexible and also fragile.

引用

页码：3564 / 3568

页数：5

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