Synthesis and characterization of polyoxovanadate-pillared Zn-Al layered double hydroxides: An x-ray absorption and diffraction study

被引：64

作者：

Barriga, C

Jones, W

Malet, P

Rives, V

Ulibarri, MA ^{[1
]}

机构：

[1] Univ Cordoba, Fac Ciencias, Dept Quim Inorgan & Ingn Quim, E-14004 Cordoba, Spain

[2] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[3] Univ Sevilla, CSIC, Dept Quim Inorgan, Sevilla, Spain

[4] Univ Sevilla, CSIC, Inst Ciencia Mat, Sevilla, Spain

[5] Univ Salamanca, Dept Quim Inorgan, Salamanca 37007, Spain

来源：

INORGANIC CHEMISTRY | 1998年 / 37卷 / 08期

关键词：

D O I：

10.1021/ic9709133

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Zn-Al layered double hydroxides (LDHs) have been prepared with Cl- and CO32- interlayer anions and with Zn/Al ratios of 2 and 3. The corresponding polyoxovanadate-containing LDHs were then prepared by anion exchange reaction at different pH values. The products were characterized by atomic absorption, PXRD, FT-IR spectroscopy, TG analysis, and transmission electron microscopy (TEM). Thr resulting vanadate-containing LDHs, depending on the pH and the Zn/Al ratio, consisted of one or more phases. PXRD patterns corresponding to layered compounds with different gallery heights (7.0, 4.6, and 2.6 Angstrom for V10O286-, V4O124- and (VO3)(n)(n-) chains, respectively) were observed. X-ray absorption spectroscopy has been also used to assess the local geometry of vanadium ions in the different samples, and results indicate the presence of V5+ ions in octahedral and/or tetrahedral coordination depending upon the conditions of the synthesis.

引用

页码：1812 / 1820

页数：9

共 38 条

[1] Synthesis and characterization of new hydrotalcite-like compounds containing Ni(II) and Mn(III) in the hydroxide layers and of their calcination [J].