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Pore structure and surface acidity evaluation of Fe-PILCs
Pillared clays delaminated clays characterisation surface area surface acidity
2010/4/8
Fe-PILCs via different conditions using smectites from Hancili (Turkey) and Wyoming (USA) were synthesised. Presaturation had little effects on the basal spacing values while it had important effects ...
Investigation of the Surface Acidity of a Bentonite Modified by Acid Activation and Thermal Treatment
Acid activation bentonite n-butylamine pore volume surface acidity surface area thermal treatment
2010/4/21
The adsorption of n-butylamine from its solution in cyclohexane on acid-activated and thermally treated Kütahya/Turkey bentonite (KB) samples was followed using a UV-VIS spectrophotometric method. The...
Surface Acidity of Palygorskite-Supported Rhodium Catalysts
Pyridine Catalysis Palygorskite Rhodium Surface acidity
2012/1/4
Infrared spectra of adsorbed pyridine have been used to obtain qualitative information on the nature of the interaction of pyridine with different rhodium catalysts supported on palygorskite and silic...
SURFACE ACIDITY OF PALYGORSKITE-SUPPORTED RHODIUM CATALYSTS
Pyridine Catalysis Palygorskite Rhodium Surface acidity
2011/11/14
Infrared spectra of adsorbed pyridine have been used to obtain qualitative information on the nature of the interaction of pyridine with different rhodium catalysts supported on palygorskite and silic...
Infrared Studies of Surface Acidity and Reversible Folding in Palygorskite
Infrared spectroscopy Lewis-acid sites Palygorskite Protonation Pyridine
2012/1/9
The infrared absorption spectra of a palygorskite sample from Cáceres, Spain, showed two previously unreported bands in the OH-stretching region at 3420–3440 and 3220–3230 cm−1 after evacuation ...
INFRARED STUDIES OF SURFACE ACIDITY AND REVERSIBLE FOLDING IN PALYGORSKITE
Infrared spectroscopy Lewis-acid sites Palygorskite Protonation Pyridine
2011/11/14
The infrared absorption spectra of a palygorskite sample from Cficeres, Spain, showed two previously unreported bands in the OH-stretching region at 3420-3440 and 3220-3230 cm -~ after evacuation at 9...
An Ultraviolet Spectroscopic Method for Monitoring Surface Acidity of Clay Minerals under Varying Water Content
Monitoring Surface Clay Minerals Varying Water Content
2012/2/15
The ability of a clay mineral surface to function as an acid is not represented by bulk pH measurements. A method using u.v. analysis and organic indicators has been developed to monitor surface acidi...
Surface Acidity of Smectites in Relation to Hydration, Exchangeable Cation, and Structure
Surface Acidity Smectites Hydration Exchangeable Cation Structure
2012/2/21
Equilibrium studies on clay films exposed to NH3 and H2O vapors demonstrate the effect of exchangeable cations on surface acidity and its relationship to hydration. At a relative humidity of 98 per ce...