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dc.contributor.authorFerreira, Liliana Domingues Reis-
dc.contributor.authorFonseca, António Manuel-
dc.contributor.authorBotelho, Gabriela-
dc.contributor.authorAlmeida Aguiar, Cristina-
dc.contributor.authorNeves, Isabel C.-
dc.description.abstractThe 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.-
dc.description.sponsorshipDr. C.S. Rodriguez (C.A.C.T.I., Vigo University, Spain) is gratefully acknowledged for performing and interpreting the XPS analyses. The authors are thankful to Dr. A.S. Azevedo for collecting the powder diffraction data. This work was supported by the Center of Chemistry and by the Center of Molecular and Environmental Biology (University of Minho, Portugal), through the project No. F-COMP-01-0124-FEDER-022716 (refª FCT PEst-C/QUI/UI0686/2011 and Pest-C/BIA/UI4050/2011), FEDER-COMPETE, FCT - Portugal.por
dc.publisherElsevier Science BVpor
dc.subjectNaY and NaX zeolitespor
dc.subjectIon exchangepor
dc.subjectXPS characterizationpor
dc.subjectAntimicrobial activitypor
dc.titleAntimicrobial activity of faujasite zeolites doped with silver-
dc.subject.wosScience & Technologypor
sdum.journalMicroporous and Mesoporous Materialspor
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