Hostname: page-component-848d4c4894-4rdrl Total loading time: 0 Render date: 2024-06-30T01:57:55.406Z Has data issue: false hasContentIssue false
  • English
  • Français

Preparation and Rietveld refinement of Ag-exchanged clinoptilolite

Published online by Cambridge University Press:  09 July 2018

L. Dimova ,
O. Petrov ,
M. Kadiyski ,
N. Lihareva ,
A. Stoyanova-Ivanova  and
V. Mikli
L. Dimova*
Affiliation:
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, 1113 Sofia, Bulgaria
O. Petrov
Affiliation:
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, 1113 Sofia, Bulgaria
M. Kadiyski
Affiliation:
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, 1113 Sofia, Bulgaria Crystallographic Mineralogy, University of Bern, Freiestr. 3, 3012 Bern, Switzerland
N. Lihareva
Affiliation:
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, 1113 Sofia, Bulgaria
A. Stoyanova-Ivanova
Affiliation:
Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
V. Mikli
Affiliation:
Centre for Materials Research, Tallinn University of Technology, Ehitajate 5, Tallinn 19086, Estonia
*
*E-mail: anien@abv.bg
Get access Rights & Permissions [Opens in a new window]

Abstract

Fully exchanged Ag-clinoptilolite prepared at 100°C using 1 M solution of AgNO3 was studied. The initial sample (Beli Plast deposit, Bulgaria) was enriched in clinoptilolite by a sequence of treatments – crushing, sieving, sedimentation, and separation with heavy liquids to obtain a content of about 93 wt.% of clinoptilolite intergrown with opal-C. Opal-C was subsequently removed by chemical treatment. Maximum cation exchange was reached on the seventh day (4.86(4) Ag atoms per formula unit). Rietveld structural refinement was then carried out on the Ag-exchanged clinoptilolite, and three independent Ag sites were localated in the channels of the clinoptilolite structure. Seven water sites, coordinating the Ag sites, were located. Ag-clinoptilolite is, potentially, a promising low-cost antibacterial material.

Keywords

clinoptiloliteion exchangesilverRietveld refinementBeli Plast depositBulgaria
Type
Research Article
Information
Clay Minerals , Volume 46 , Issue 2 , June 2011 , pp. 205 - 212
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Brown, I. D. & Altermatt, D. (1985) Bond-valence parameters obtained from a systematic analysis of the Inorganic Crystal Structure Database. Ada Crystallographica, B41, 240–244.Google Scholar
Cappelleti, P., Langella, A. & Cruciani, G. (1999) Crystal chemistry and synchrotron Rietveld refinement of two different clinoptilolites from volcanoclastites of North-Western Sardinia. European Journal of Mineralogy, 11, 1051–1060.CrossRefGoogle Scholar
Capelli, C. (1997) U.S. Patent 5,607,683. March 4, USA.Google Scholar
Concepcion-Rosabal, B., Rodríguez-Fuentes, G., Bogdanchikova, N., Bosch, P., Avalos, M. & Lara, V.H. (2005) Comparative study of natural and synthetic clinoptilolites containing silver in different states. Microporous and Mesoporous Materials, 86, 249–255.CrossRefGoogle Scholar
Cowan, M.M., Abshire, K.Z., Houk, S.L. & Evans, S.M. (2003) Antimicrobial efficacy of a silver—zeolite matrix coating on stainless steel. Journal of Industrial Microbiology and Biotechnology, 30, 102–106.CrossRefGoogle ScholarPubMed
Dimova, L., Kirov, G.N., Petrov, O., Tzvetanova, Y. & Lihareva, N. (2009) Rietveld structure refinement of Zn-exchanged clinoptilolite. Pp. 27–32 in. Proceedings from the First National Crystallographic Symposium, 22-23 October 2009, Sofia, Bulgaria.Google Scholar
DiffracPlus TOPAS v. 4.2. (2009) Bruker AXS Karlsruhe — Germany.Google Scholar
Godelitsas, A. & Armbruster, T. (2003) HEU-type zeolites modified by transition elements and lead. Microporous and Mesoporous Materials, 61, 3–24.CrossRefGoogle Scholar
Koyama, K. & Takeuchi, Y. (1977) Clinoptilolite: the distribution of potassium atoms and its role in thermal stability. Zeitschrifi für Kristallographie, 145, 216–239.Google Scholar
Pahor, N.B., Calligaris, M., Nardin, G., Randaccio, L. & Russo, E. (1980) Crystal structure of a partially silver heulandite. Journal of the Chemical Society, Dalton Transactions, 1511-1514.Google Scholar
Pahor, N.B., Calligaris, M., Nardin, G. & Randaccio, L. (1981) Location of cations in metal ion-exchanged zeolites. Part 2. Crystal structure of a fully silverexchanged heulandite. Journal of the Chemical Society, Dalton Transactions, 2288-2291.Google Scholar
Petrov, O.E. (1995) Cation exchange in clinoptilolite: an X-ray powder diffraction analysis. Pp. 271–279 in: Natural Zeolites ‘93: Occurrence, Properties, Use (Ming, D.W. & Mumpton, F.A., editors). International Committee on Natural Zeolites, Brockport, New York.Google Scholar
Rivera-Garza, M., Olguin, M.T., García-Sosa, I., Alcantara, D. & Rodríguez-Fuentes, G. (2000) Silver supported on natural Mexican zeolite as an antibacterial material. Microporous and Mesoporous Materials, 39, 431–444.CrossRefGoogle Scholar
Shirakawa, H., Yamakawa, O., Nihonmatsu, H. & Atsumi, K. (1997) US. Patent 5,618,762, April 8, USA.Google Scholar
Top, A. & Ülkü, S. (2004) Silver, zinc, and copper exchange in a Na-clinoptilolite and resulting effect on antibacterial activity. Applied Clay Science, 27, 13–19.CrossRefGoogle Scholar