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具有纤铁矿型层状结构的质子钛酸盐HxTi2-x/4[符号：见原文]x/4O4·H2O（[符号：见原文]，空位；x = 0.7）的拉曼散射特性

Raman scattering properties of a protonic titanate HxTi2-x/4[symbol: see text]x/4O4.H2O ([symbol: see text], vacancy; x=0.7) with lepidocrocite-type layered structure.

作者信息

Gao Tao, Fjellvåg Helmer, Norby Poul

机构信息

Center for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Oslo, Norway.

出版信息

J Phys Chem B. 2008 Aug 7;112(31):9400-5. doi: 10.1021/jp801639a. Epub 2008 Jul 16.

DOI:10.1021/jp801639a
PMID:18630865
Abstract

Raman scattering spectroscopy is employed to characterize a layered titanate HxTi2-x/4[symbol: see text]x/4O4.H2O ([symbol: see text]: vacancy; x=0.7) with lepidocrocite (gamma-FeOOH)-type layered structure. Nine Raman lines corresponding to (3Ag+3B1g+3B3g) Raman-active modes expected from this orthorhombic structure (space group D2h25-Immm) are recorded at 183, 270, 387, 449, 558, 658, 704, 803, and 908 cm(-1), which are assigned to Ti-O lattice vibrations within the two-dimensional (2D) lepidocrocite-type TiO6 octahedral host layers. These intrinsic Raman bands present a clear signature that can be used for probing the protonic titanate HxTi2-x/4[symbol: see text]x/4O4.H2O and the 2D titanate nanosheets, as well as their corresponding derivates.

摘要

拉曼散射光谱法用于表征具有纤铁矿（γ-FeOOH）型层状结构的层状钛酸盐HxTi2-x/4[符号：见原文]x/4O4·H2O（[符号：见原文]：空位；x = 0.7）。从这种正交结构（空间群D2h25-Immm）预期的对应于（3Ag + 3B1g + 3B3g）拉曼活性模式的九条拉曼谱线记录在183、270、387、449、558、658、704、803和908 cm(-1)处，这些谱线被指定为二维（2D）纤铁矿型TiO6八面体主体层内的Ti-O晶格振动。这些本征拉曼带呈现出清晰的特征，可用于探测质子钛酸盐HxTi2-x/4[符号：见原文]x/4O4·H2O和二维钛酸盐纳米片及其相应的衍生物。

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