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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 7
BKCSDE 34(7)
July 20, 2013 

Exfoliation of Dion-Jacobson Layered Perovskite into Macromolecular Nanoplatelet
Won-Jae Lee, Hyun Jung Yeo, Do-Yun Kim, Seung-Min Paek*, Young-Il Kim*
Exfoliation, Intercalation, Layered material, Nanosheet
A layered perovskite of Dion-Jacobson phase, RbLaTa2O7, was successfully exfoliated into colloidal suspension via successive ion-exchange and intercalation reaction. The pristine perovskite RbLaTa2O7 was synthesized by conventional solid-state reaction, and then, it was ion-exchanged with hydrochloric acid to obtain a protonic form of perovskite. The resulting proton-exchanged perovskite was reacted with ethylamine to increase interlayer spaces for further intercalation reaction. Finally, the ethylamine-intercalated form was exfoliated into nanosheets via an intercalation of bulky organic cations (tetrabutylammonium). According to X-ray diffraction (XRD) analysis, the TBA-intercalated form showed remarkably increased interlayer spacing (Δd = 1.67 nm) in comparison with that of the pristine material. Transmission electron microscopic image of exfoliated perovskite clearly revealed that the present exfoliated perovskite were composed of very thin layers. This exfoliated perovskite nanosheets could be applicable as building blocks for fabricating functional nanocomposites.
2041 - 2043
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