Abstract
Cobalt aluminium hydrotalcites with different compositions were prepared by a coprecipitation method under low supersaturation conditions. The compounds were characterized by X-ray diffraction (XRD), infrared absorption (IR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and BET surface area measurements. XRD and IR studies revealed that all the compounds are single-phase crystallized under a hydrotalcite-like network. Hydrothermal treatments given to the aged sample increased the crystallinity of the samples. TG studies showed two stages of weight loss, the first due to the removal of interlayer water and the second ascribed to the removal of water molecules from the brucite sheet and CO2 from the interlayer carbonate anion, whose transition temperature depends on the Co/Al atomic ratio. Thermal calcination of these materials results in the formation of high surface area non-stoichiometric spinel phase whose crystallinity increases with increase in the calcination temperature attributed to the sintering of the particles.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
W. Feitknecht, Helv. Chem. Acta 25 (1942) 131.
R. Allmann, Acta Cystallogr. 24 (1968) 972.
H. F. W. Taylor, Mineral. Mag. 39 (1973) 377.
S. Miyata, Clays Clay Miner. 23 (1975) 369.
W. T. Reichle, Solid State Ionics 22 (1986) 135.
K. A. Corrado, A. Kostapapas and S. L. Suib, ibid. 26 (1988) 77.
H. C. B. Hansen and R. M. Taylor, Clay Miner. 25 (1990) 161.
T. J. Pinnavaia, NATO ASI Ser., Ser. C, Zeolite Microporous Solids: Synthesis, structure and reactivity (1992) p. 91.
S. Kannan and C. S. Swamy, J. Mater. Sci. Lett. 11 (1992) 1585.
F. Cavani, F. Trifiro and A. Vaccari, Catal. Today 11 (1991) 173.
E. C. Kruissink, L. L. Van Reijen and J. R. H. Ross, J. Chem. Soc. Farad. Trans. I 77 (1981) 665.
O. Clause, M. Gazzano, F. Trifiro, A. Vaccari and L. Zotorski, Appl. Catal. 73 (1991) 217.
W. T. Reichle, J. Catal. 94 (1985) 547.
S. Kannan and C. S. Swamy, Appl. Catal. B, 3 (1994) 109.
D. E. Laylock, R. L. Collacoat, D. A. Skelton and M. F. Tchir, J. Catal. 130 (1991) 354.
T. Sato, H. Okuyama, T. Endo and M. Shimada, React. Solids 8 (1990) 63.
S. Kannan and C. S. Swamy, in “INDO-US workshop on Perspectives in New Materials”, New Delhi, India, 23–24 March 1992, abstract p. 75.
S. Miyata, Clays Clay Miner. 31 (1983) 305.
R. D. Shannon and C. T. Prewitt, Acta Crystallogr. B25 (1969) 925.
B. D. Cullity, in “Elements of X-ray Diffraction” (Addison-Wesley, Reading, MA, 1987) p. 284.
F. M. Labajas, V. Rives and M. A. Ulibarri, J. Mater. Sci. 27 (1992) 1546.
M. J. Hernandez-Moreno, M. A. Ulibarri, J. L. Rendon and C. J. Serna, Phys. Chem. Miner. 12 (1985) 34.
L. Pesic, S. Salipurovic, V. Markovic, D. Vucelic, W. Kagunya and W. Jones, J. Mater. Chem. 2 (1992) 1069.
A. J. Marchi, J. I. Di Cosimo and C. R. Apestiguia, in “Proceedings of the 9th International Congress on Catalysis”, Vol. 2, Chemical Institute of Canada, Ottawa, edited by M. J. Phillips and M. Ternan (1988) p. 529.
M. J. Hernandez, M. A. Ulibarri, J. L. Rendon and C. J. Serna, Thermochim. Acta 81 (1984) 187.
P. Garcia Casado and I. Rasines, J. Solid State Chem. 52 (1984) 187.
W. T. Reichle, S. Y. Kang and D. S. Everhardt, J. Catal. 101 (1986) 352.
E. C. Kruissink, L. E. Alzamora, S. Orr, E. B. M. Doesburg, L. L. Van Reijen, J. R. H. Ross and G. Van Veen, in “Preparation of Catalysts II”, Studies in Surface Science Catalysis, Vol. 3, edited by B. Delmon, P. Grange, P. A. Jacobs and G. Poncelet (Elsevier, Amsterdam, 1979) p. 143.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kannan, S., Velu, S., Ramkumar, V. et al. Synthesis and physicochemical properties of cobalt aluminium hydrotalcites. Journal of Materials Science 30, 1462–1468 (1995). https://doi.org/10.1007/BF00375249
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00375249