Protonic titanate derived from CsxTi2−x/2Mgx/2O4 (x = 0.7) with lepidocrocite-type layered structure

Tao Gao; Helmer Fjellvåg; Poul Norby

doi:10.1039/B813147C

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Protonic titanate derived from Cs_xTi_2−x/2Mg_x/2O₄ (x = 0.7) with lepidocrocite-type layered structure†

Tao Gao,*^a Helmer Fjellvåg^a and Poul Norby^a

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* Corresponding authors

^a Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, N-0315 Oslo, Norway
E-mail: tao.gao@kjemi.uio.no
Fax: +47-22855565
Tel: +47-22857428

Abstract

A layered titanate Cs_xTi_2−x/2Mg_x/2O₄ (x = 0.7) with lepidocrocite (γ-FeOOH)-type layered structure was prepared via solid-state reaction. Extraction of both Mg²⁺ ions in the host layers and interlayer Cs⁺ ions was achieved during an acid-exchange process, producing a new protonic titanate H_xTi_2−x_/2O_4−x/2·H₂O. This phase was distinguished from isomorphous related compounds in terms of removable lattice Mg and O atoms. The protonic titanate H_xTi_2−x_/2O_4−x/2·H₂O showed excellent exfoliation/delamination reactivity upon intercalating organic amine ions as well as the ability to produce single two-dimensional titanate nanosheets with small thickness of about 1 nm. These findings offered a new clue for understanding the physicochemical properties of lattice dopants in lepidocrocite titanates.

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Supplementary files

Powder X-ray diffraction data TXT (1019K)

Article information

DOI: https://doi.org/10.1039/B813147C
Article type: Paper
Submitted: 30 Jul 2008
Accepted: 14 Nov 2008
First published: 19 Dec 2008

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J. Mater. Chem., 2009,19, 787-794

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Protonic titanate derived from Cs_xTi_2−x/2Mg_x/2O₄ (x = 0.7) with lepidocrocite-type layered structure

T. Gao, H. Fjellvåg and P. Norby, J. Mater. Chem., 2009, 19, 787 DOI: 10.1039/B813147C

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Journal of Materials Chemistry