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Type: Artigo de periódico
Title: The ion-exchange capacity of Ti and Zr lamellar hydrogenphosphates - TG measurements
Author: de Farias, RF
Nunes, LM
Airoldi, C
Abstract: Thermogravimetric data were used to calculate the number of acidic Bronsted sites in lamellar alpha-titanium (alpha-TiP), gamma-titanium (gamma-TiP), alpha-zirconium (alpha-ZrP) and gamma-zirconium (gamma-ZrP) hydrogenphosphates. The numbers of acidic sites calculated for these lamellar compounds were 7.81, 5.67, 6.33 and 5.56 for alpha-TiP, gamma-TiP, alpha-ZrP and gamma-ZrP, respectively. These values are in good agreement with those found through potentiometric titration. The data obtained prove that thermogravimetric measurements can be used as a reliable analytical tool to follow the ion-exchange capacity of this kind of crystalline lamellar compounds.
Subject: ion exchange
lamellar compounds
titanium phosphate
zirconium phosphate
Country: Holanda
Editor: Kluwer Academic Publ
Citation: Journal Of Thermal Analysis And Calorimetry. Kluwer Academic Publ, v. 60, n. 2, n. 517, n. 521, 2000.
Rights: fechado
Identifier DOI: 10.1023/A:1010186719282
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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