期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 160, 期 -, 页码 126-132出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2012.05.006
关键词
NaY and NaX zeolites; Silver; Ion exchange; XPS characterization; Antimicrobial activity
类别
资金
- Center of Chemistry
- Center of Molecular and Environmental Biology (University of Minho, Portugal) [F-COMP-01-0124-FEDER-022716, FCT PEst-C/QUI/UI0686/2011, Pest-C/BIA/UI4050/2011]
- FEDER-COMPETE
- FCT - Portugal
The preparation, characterization and antimicrobial activity of faujasite (FAU) zeolites (NaY and NaX) doped with silver are reported. The antimicrobial activity properties were achieved in both FAU zeolites by ion exchange method. The characterization was performed by X-ray diffraction (XRD), Scanning electron microscopy (SEM). X-ray photoelectron spectroscopy (XPS), Fourier transformed infrared spectroscopy (FTIR) and chemical analyses. The characterization results indicate that silver were interchanged in the structure of FAU zeolites. Antimicrobial potential of silver zeolites (AgY and AgX) was evaluated using bacteria (Escherichia coli and Bacillus subtilis) and yeast (Saccharomyces cerevisiae and Candida albicans) as sensitive indicator strains. The detected antimicrobial properties were generated by the silver present in the zeolite structure, as confirmed by XPS analysis and antimicrobial activity assays. Both zeolites showed good antimicrobial properties, in particular antibacterial activity, but AgY displayed lower minimum inhibitory concentration (MIC) values than AgX. (C) 2012 Elsevier Inc. All rights reserved.
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