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TitleAntimicrobial activity of faujasite zeolites doped with silver
Author(s)Ferreira, Liliana Domingues Reis
Fonseca, António Manuel
Botelho, Gabriela
Almeida Aguiar, Cristina
Neves, Isabel C.
KeywordsNaY and NaX zeolites
Ion exchange
XPS characterization
Antimicrobial activity
Issue date2012
PublisherElsevier Science BV
JournalMicroporous and Mesoporous Materials
Abstract(s)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.
AccessRestricted access (UMinho)
Appears in Collections:CDQuim - Artigos (Papers)

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