Comparative Study of Mg/ M(III) ( M=Al, Ga, In) Layered Double Hydroxides Obtained by Coprecipitation and the Sol–Gel Method

• Published in: Journal of solid state chemistry 2002-10, Vol.168 (1), p.156-161
• Main Authors: Aramendı&#x0301, a, Marı&#x0301, a A., Borau, Victoriano, Jiménez, César, Marinas, José M., Ruiz, José R., Urbano, Francisco J.
• Format: Article
• Language: English
• Subjects: Chemistry; Colloidal state and disperse state; Condensed matter: structure, mechanical and thermal properties; coprecipitation; Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...); Exact sciences and technology; General and physical chemistry; hydrotalcite; Inorganic chemistry and origins of life; Inorganic compounds; layered double hydroxides; mixed oxides; Physics; Porous materials; Preparations and properties; sol–gel method; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Water, oxides, hydroxides, peroxides
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1006/jssc.2002.9655

Various layered double hydroxides (LDHs) consisting of magnesium and a trivalent metal (Al, Ga or In) in an Mg/ M(III) ratio of 3 were prepared by precipitation from the corresponding nitrates and also from magnesium ethoxide and the acetylacetonates of the trivalent metals using the sol–gel method. The six LDHs thus obtained were calcined at 500°C. All solids were characterized by XRD and IR spectroscopy prior to and after calcination. Their textural properties were determined from nitrogen adsorption measurements and their surface chemical properties by CO 2 chemisorption.