The effect of varying synthesis conditions on zinc chromium hydrotalcite: a spectroscopic study

被引：72

作者：

Kloprogge, JT ^{[1
]}

Hickey, L ^{[1
]}

Frost, RL ^{[1
]}

机构：

[1] Queensland Univ Technol, Sch Phys & Chem Sci, Inorganic Mat Res Program, Brisbane, Qld 4001, Australia

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2005年 / 89卷 / 01期

关键词：

hydrotalcite; infrared spectroscopy; synthesis; thermal analysis; Raman spectroscopy; spectroscopy; X-ray diffraction;

D O I：

10.1016/j.matchemphys.2004.08.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zn/Cr hydrotalcites were synthesised by coprecipitation, with varying pH values and divalent/trivalent metal ion ratio. Depending on the pH conditions, two 3R rhombohedral varieties were synthesised with different layer spacings of 7.8 and 8.9 Angstrom, at room temperature. More carbonate was incorporated in the interlayer of samples prepared at low pH values, increasing the interlayer distance and the unit cell. Preparation under acidic conditions lead to a more crystalline, pure and thermally stable compound. Spectroscopy was used to determine the effect of varying the ratio of divalent/trivalent metal ion ratio. It was shown that although ratios >2 yield crystalline compounds a ratio of 3 was preferred for both phases. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：99 / 109

页数：11

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