𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Thermo-Raman spectroscopy of selected layered double hydroxides of formula Cu6Al2(OH)16CO3 and Zn6Al2(OH)16CO3

✍ Scribed by Ray L. Frost; Aurore Soisnard; Nicolas Voyer; Sara J. Palmer; Wayde N. Martens

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
136 KB
Volume
40
Category
Article
ISSN
0377-0486

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Raman spectroscopy using a hot stage was used to characterise layered double hydroxides (LDHs) of the formula (Cu,Zn)~6~Al~2~(OH)~16~(CO~3~)^·^4H~2~O. The spectra were used to assess the molecular assembly of the cations in the LDH structure. The sharp band at 1058 cm^−1^for the Zn~6~Al~2~(OH)~16~(CO~3~)^·^4H~2~O is assigned to the ν~1~CO~3~^2−^ symmetric stretching mode. This band shifts to higher wavenumbers and is observed at 1103 cm^−1^at 600 °C. It is proposed that metal carbonate species formed during the decomposition of the hydrotalcite structure is responsible for the increase in the band position. The Cu–Al hydrotalcite did not show the same trend. The symmetric stretching mode of carbonate is observed at around 1110 cm^−1^, and at temperatures above 200 °C a shoulder appears at around 1210 cm^−1^, suggested to be due to CuCO~3~. Copyright © 2008 John Wiley & Sons, Ltd.

📜 SIMILAR VOLUMES

Raman spectroscopy of gallium-based hydr
Raman spectroscopy of gallium-based hydrotalcites of formula Mg6Ga2(CO3)(OH)16· 4H2O
✍ Ray L. Frost; Sara J. Palmer; Laure-Marie Grand 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 321 KB

## Abstract Insight into the unique structure of hydrotalcites has been obtained using Raman spectroscopy. Gallium‐containing hydrotalcites of formula Mg~4~Ga~2~(CO~3~)(OH)~12~· 4H~2~O (2:1 Ga‐HT) to Mg~8~Ga~2~(CO~3~)(OH)~20~· 4H~2~O (4:1 Ga‐HT) have been successfully synthesized and characterized

Synthesis and Raman spectroscopy of indi
Synthesis and Raman spectroscopy of indium-based hydrotalcites of formula Mg6In2(CO3)(OH)16· 4H2O
✍ Ray L. Frost; Sara J. Palmer; Laure-Marie Grand 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 220 KB

## Abstract Insight into the unique structure of layered double hydroxides has been obtained using a combination of X‐ray diffraction and Raman spectroscopy. Indium‐containing hydrotalcites of formula Mg~4~In~2~(CO~3~)(OH)~12~· 4H~2~O [2:1 In‐LDH (layered double hydroxides)] through to Mg~8~In~2~(C

Trivalent Cation Substitution Effect int
Trivalent Cation Substitution Effect into Layered Double Hydroxides Co2Fey Al1−y(OH)6Cl·nH2O: Study of the Local Order: Ionic Conductivity and Magnetic Properties
✍ Mourad Intissar; Rachid Segni; Christophe Payen; Jean-Pierre Besse; Fabrice Lero 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 454 KB

A series of layered double hydroxide materials of composition Co 2 Fe y Al 1Ày (OH) 6 Cl . nH 2 O (0ryr1) was prepared via chimie douce. The crystalline parameter related to the cation to cation distance obeys the expected variation, showing that the substitution is effective over the entire range.