The effect of interlayer anion on the reactivity of Mg-Al layered double hydroxides: improving and extending the customization capacity of anionic clays
| Autor: | M. Ángeles Ulibarri, Carla E. Giacomelli, Ricardo Rojas, Carlos P. De Pauli, Felipe Bruna |
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| Přispěvatelé: | Ministerio de Asuntos Exteriores y Cooperación (España), Secretaría de Ciencia y Técnica de la Nación (Argentina), Agencia Nacional de Promoción Científica y Tecnológica (Argentina), Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina) |
| Rok vydání: | 2011 |
| Předmět: |
Anions
Range (particle radiation) Chemistry Inorganic chemistry Layered double hydroxides Particle charge engineering.material Chloride Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion Biomaterials Contact angle Electrophoresis Colloid and Surface Chemistry medicine engineering Hydroxides Clay Reactivity (chemistry) Aluminum Silicates Magnesium medicine.drug Aluminum |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1095-7103 |
| Popis: | Layered double hydroxides (LDHs) reactivity and interfacial behavior are closely interconnected and control particle properties relevant to the wide range of these solids’ applications. Despite their importance, their relationship has been hardly described. In this work, chloride and dodecylsulfate (DDS−) intercalated LDHs are studied combining experimental data (electrophoretic mobility and contact angle measurements, hydroxyl and organic compounds uptake) and a simple mathematical model that includes anion-binding and acid–base reactions. This approach evidences the anion effect on LDHs interfacial behavior, reflected in the opposite particle charge and the different surface hydrophobic/hydrophilic character. LDHs reactivity are also determined by the interlayer composition, as demonstrated by the cation uptake capability of the DDS− intercalated sample. Consequently, the interlayer anion modifies the LDHs interfacial properties and reactivity, which in turn extends the customization capacity of these solids. Economic support by SeCyT-UNC, FONCyT, CONICET, and AECI. RRD thanks AECI and CONICET for the scholarships granted. |
| Databáze: | OpenAIRE |
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