Characterization and water adsorption properties of Ag-and Zn-exchanged A zeolites

被引：45

作者：

Benaliouche, F. ^{[1
]}

Hidous, N. ^{[1
]}

Guerza, M. ^{[1
]}

Zouad, Y. ^{[1
]}

Boucheffa, Y. ^{[1
]}

机构：

[1] Ecole Mil Polytech, UER Chim Appl, Algiers 16111, Algeria

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2015年 / 209卷

关键词：

LTA-type zeolite; Zeolite-based hemostatic agent; Water adsorption; Exothermicity; HEMOSTATIC DRESSINGS; DIFFUSION; FTIR;

D O I：

10.1016/j.micromeso.2014.10.039

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Ag- and Zn-exchanged A zeolites are prepared by the liquid ion exchange method following the procedure reported in our previous studies. Samples with Ag and Zn metal loadings are obtained and characterized by physicochemical and thermal analyses. The obtained materials with improved physicochemical properties are promising candidates for use as haemostatic agents. Both powder X-ray diffraction and nitrogen adsorption measurements show good conservation of the zeolitic structure and texture after ionic exchange. Porosity measurements indicate that the variation of the porous volumes and the specific surface areas depends on the number and nature of exchanged cations. Thermal behavior of water adsorption studied by using TGA microbalance and differential scanning calorimetry highlights clearly the complexity of the adsorption and diffusion mechanisms of water molecules within the micropores of exchanged zeolites. The differences between sorption rates and hydration heats appear to be due mainly to the location and migration of Ag, Ca and Zn species in the cationic position of the A zeolite framework. The exothermicity of adsorption is attenuated by Ag and Zn exchange. (C) 2014 Elsevier Inc. All rights reserved.

引用

页码：184 / 188

页数：5

共 30 条

[1] Exothermic reaction in zeolite hemostatic dressings:: QuikClot ACS and ACS+® [J].

Arnaud, Francoise ;

Tomori, Toshiki ;

Carr, Walter ;

McKeague, Anne ;

Teranishi, Kohsuke ;

Prusaczyk, Keith ;

McCarron, Richard .

ANNALS OF BIOMEDICAL ENGINEERING, 2008, 36 (10) :1708-1713

[2] NH3-TPD and FTIR spectroscopy of pyridine adsorption studies for characterization of Ag- and Cu-exchanged X zeolites [J].

Benaliouche, F. ;

Boucheffa, Y. ;

Ayrault, P. ;

Mignard, S. ;

Magnoux, P. .

MICROPOROUS AND MESOPOROUS MATERIALS, 2008, 111 (1-3) :80-88

[3]

Benaliouche F, 2006, NATO SCI SER II-MATH, V219, P567

[4] In situ FTIR studies of propene adsorption over Ag- and Cu-exchanged Y zeolites [J].

Benaliouche, F. ;

Boucheffa, Y. ;

Thibault-Starzyk, F. .

MICROPOROUS AND MESOPOROUS MATERIALS, 2012, 147 (01) :10-16

[5]

Benaliouche F, 2006, STUD SURF SCI CATAL, V160, P447

[6] Military medical revolution: Prehospital combat casualty care [J].

Blackbourne, Lorne H. ;

Baer, David G. ;

Eastridge, Brian J. ;

Kheirabadi, Bijan ;

Kragh, John F., Jr. ;

Cap, Andrew P. ;

Dubick, Michael A. ;

Morrison, Jonathan J. ;

Midwinter, Mark J. ;

Butler, Frank K. ;

Kotwal, Russell S. ;

Holcomb, John B. .

JOURNAL OF TRAUMA AND ACUTE CARE SURGERY, 2012, 73 :S372-S377

[7] Positronium annihilation in LTA-type zeolite [J].

Cabral-Prieto, A. ;

Garcia-Sosa, I. ;

Lopez-Castanares, R. ;

Olea-Cardoso, O. .

MICROPOROUS AND MESOPOROUS MATERIALS, 2013, 175 :134-140

[8] Thermal and spectroscopic studies of zeolites exchanged with metal cations [J].

Castaldi, P ;

Santona, L ;

Cozza, C ;

Giuliano, V ;

Abbruzzese, C ;

Nastro, V ;

Melis, P .

JOURNAL OF MOLECULAR STRUCTURE, 2005, 734 (1-3) :99-105

[9]

Delahay G, 2002, ZEOLITES CLEANER TEC, P345

[10] Cold plasma as environmentally benign approach for activation of zeolite nanocrystals [J].

El Roz, Mohamad ;

Lakiss, Louwanda ;

Valtchev, Valentin ;

Mintova, Svetlana ;

Thibault-Starzyk, Frederic .

MICROPOROUS AND MESOPOROUS MATERIALS, 2012, 158 :148-154

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