Study by infrared spectroscopy and thermogravimetry of the effect of temperature on nickel-aluminum hydrotalcites

The synthesis and use of materials as hydrotalcites have a high impact on development of new materials and technological advances, applied in areas such as catalysis and environmental chemistry. An aspect of vital importance is the temperature of collapse of the HTLc structure, because from this fac...

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Autores:
Ríos León, Ilich
Solano Polo, Cesar
Rodríguez Ruiz, Johana
Espinosa Fuentes, Eduardo Antonio
Meza Fuentes, Edgardo
Tipo de recurso:
Article of journal
Fecha de publicación:
2017
Institución:
Corporación Universidad de la Costa
Repositorio:
REDICUC - Repositorio CUC
Idioma:
eng
OAI Identifier:
oai:repositorio.cuc.edu.co:11323/2004
Acceso en línea:
https://hdl.handle.net/11323/2004
https://repositorio.cuc.edu.co/
Palabra clave:
Hydrotalcite
Activation energy
Collapse of structure
Hidrotalcita
Energía de activación
Colapso de estructura
Rights
openAccess
License
Atribución – No comercial – Compartir igual
Description
Summary:The synthesis and use of materials as hydrotalcites have a high impact on development of new materials and technological advances, applied in areas such as catalysis and environmental chemistry. An aspect of vital importance is the temperature of collapse of the HTLc structure, because from this fact depend the properties of solids obtained. In this work was studied the thermal behavior of nickel-aluminum hydrotalcite, and determined the Ea associated with the collapse and formation of NiO. It was observed that the greater interaction among carbonate ions and OH groups occurs at 250 °C, temperature at which the collapse of the HTLc structure occurs. The solid N0,75A0,25 requires less energy to collapse, which is due to the greater distances between the positive sheets. The solid N0,66A0,33 need more energy for the formation of NiO, which is due to higher content of Al3+, disfavoring the growth of the initial particles of NiO.