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.
CITATION STYLE
Tanaka, T., Ebina, Y., Takada, K., Kurashima, K., & Sasaki, T. (2003). Oversized titania nanosheet crystallites derived from flux-grown layered titanate single crystals. Chemistry of Materials, 15(18), 3564–3568. https://doi.org/10.1021/cm034307j
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