Paper Title:
Preparation of CuMgAl Hydrotalcite-Like Compounds at Low MII/MIII Molar Ratios
  Abstract

CuMgAl hydrotalcite-like compounds with MII/MIII=1 and Cu/Mg molar ratios 3:1, 1:1, 1:3 and 1:19 were synthesized by coprecipitation and characterized by elemental analyses, XRD, SEM, FT-IR, TG-DTA and BET surface area test. XRD of all samples showed that Cu/Mg/Al hydrotalcites without any detectable impurity phase could be obtained at Cu/Mg molar ratios 1:3 and 1:19, however, at high Cu/Mg molar ratios 3:1 and 1:1, Al(OH)3 and copper hydroxides or oxides were obtained in the products besides the hydrotalcites, owing to the strong Jahn-Teller effect of Cu2+. It was also found that the crystallinity of the solids increased with an increase in copper content. IR results showed that the symmetry of carbonate was reduced from D3h to lower symmetry at high copper content. The thermal stability of the compounds decreased with increasing copper content, as indicated by TG-DTA measurements. Further thermal decomposition analyses showed that the surface area reached the maximum at calcination temperature of 500 ° C and mixed metal oxides with crystalline MgO, amorphous Al2O3 and highly dispersed CuO were obtained.

  Info
Periodical
Advanced Materials Research (Volumes 47-50)
Edited by
Alan K.T. Lau, J. Lu, Vijay K. Varadan, F.K. Chang, J.P. Tu and P.M. Lam
Pages
898-902
DOI
10.4028/www.scientific.net/AMR.47-50.898
Citation
Y. M. Shen, J. Wu, C. H. Liu, Z. X. Zhang, "Preparation of CuMgAl Hydrotalcite-Like Compounds at Low MII/MIII Molar Ratios", Advanced Materials Research, Vols. 47-50, pp. 898-902, 2008
Online since
June 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Ji Hee Park, Mie Won Jung, Tae Whan Hong
Abstract:The purpose of this work was hydrogen permeation of ceramic or metal/ceramic membrane using γ-Al2O3 by synthesizing. The γ-Al2O3 was...
25
Authors: Jia Huan Xu, Hua Ke, De Chang Jia, Wen Wang, Yu Zhou
Abstract:The present investigation reports on the preparation of BiFeO3 nanopowders by a sol-gel method using acetylacetone as a stabilizer....
314
Authors: Li Min Gao, Guang Chuan Liang, Li Wang, Xiao Ke Zhi, Xiao Fei Jie
Abstract:LiFePO4/C powders were synthesized by carbothermal reduction method using Li2CO3 (A.R), FePO4 (A.R) and glucose as raw materials. In this...
248
Authors: Yi Shan Jiang, Jiang Hua Luo, Zhen Li, Lu Ning Chen
Chapter 9: Nano Materials
Abstract:Cornstalk fibers were modified with surface modification and the properties of cornstalk fiber/gypsum composites was studied. The results...
1162
Authors: Saet Byol Rim, Kyeong Il Kim, Tae Whan Hong, Mie Won Jung
Abstract:The Al2O3-CuO-ZnO (ACZ) was synthesized from sol-gel process with aluminum isopropoxide, copper (II) nitrate hemi...
251