Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 86: Issue 1
Studies of surface properties of Na- and La-montmorillonites
Thermogravimetry Q-TG, sorptometry, porosimetry and AFM methods
Authors:
P. Staszczuk Maria Curie-Skłodowska University Department of Physicochemistry of Solid Surface, Chemistry Faculty Lublin Poland 20-031 M. Curie-Skłodowska Sq. 3 Lublin Poland 20-031 M. Curie-Skłodowska Sq. 3

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J. Bazan Universidad Nacional del Sur Departamento De Quimica e Ing. Quimica, Laboratorio De Fisicoquimica Inorganica Bahia Blanca Argentina 8000 Bahia Blanca Argentina 8000

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M. Błachnio Maria Curie-Skłodowska University Department of Physicochemistry of Solid Surface, Chemistry Faculty Lublin Poland 20-031 M. Curie-Skłodowska Sq. 3 Lublin Poland 20-031 M. Curie-Skłodowska Sq. 3

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D. Sternik Maria Curie-Skłodowska University Department of Physicochemistry of Solid Surface, Chemistry Faculty Lublin Poland 20-031 M. Curie-Skłodowska Sq. 3 Lublin Poland 20-031 M. Curie-Skłodowska Sq. 3

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N. Garcia Universidad Nacional del Sur Departamento De Quimica e Ing. Quimica, Laboratorio De Fisicoquimica Inorganica Bahia Blanca Argentina 8000 Bahia Blanca Argentina 8000

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Pages:
57–68
Online Publication Date:
28 Sep 2006
Publication Date:
01 Sep 2006
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-006-7577-3
Keywords:
AFM; Na- and La- montmorillonites; porosimetry; sorptometry; thermogravimetry Q-TG; total heterogeneity
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Abstract  

This paper presents possible applications of thermal analysis, sorptometry and porosimetry to study physico-chemical properties of Na- and La-montmorillonite samples, especially for determination of total surface heterogeneity. The quasi-isothermal thermogravimetric (Q-TG) mass loss and its first derivative (Q-DTG) curves with respect to temperature and time obtained during programmed liquid thermodesorption under quasi-isothermal conditions have been used to study adsorbed layers and heterogeneous properties of the Na- and La-montmorillonites. Calculations of the desorption energy distribution functions by analytical procedure using mass loss Q-TG and differential mass loss Q-DTG curves of thermodesorption under quasi-isothermal conditions of polar and non-polar liquid vapours preadsorbed on a material surface are presented. Parameters relating to porosity of samples were determined by sorptometry, mercury porosimetry and atomic force microscopy (AFM). From nitrogen sorption isotherms from sorptometry and porosimetry methods, the fractal dimensions of montmorillonites have been calculated. Moreover, a new approach is proposed to calculate fractal dimensions of materials obtained from Q-TG curve; this is compared with values obtained by the above methods. The total heterogeneous properties (energy distribution function and pore-size distribution functions) of samples studied were estimated. The radius and pore volume of the tested samples calculated on the basis of thermogravimetry, sorptometry and porosimetry techniques were compared and good correlations obtained.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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