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Antimicrobial efficacy of building material based on ZnO/palygorskite against gram-negative and gram-positive bacteria

2020Journal article Restricted access
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dc.contributor.authorRosendo, Frederico R.G.V.
dc.contributor.authorPinto, Lucas I.F.
dc.contributor.authorLima, Idglan S. de
dc.contributor.authorTrigueiro, Pollyana
dc.contributor.authorHonório, Luzia M. de C.
dc.contributor.authorFonseca, Maria Gardênnia
dc.contributor.authorOsajima, Josy A.
dc.contributor.authorRibeiro, Alessandra B.
dc.date.accessioned2020-03-03T12:00:55Z
dc.date.available2020-03-03T12:00:55Z
dc.date.issued2020
dc.description.abstractThis study investigated ZnO nanoparticles immobilized in palygorskite clay mineral (Pal) that acted as an inorganic antimicrobial agent in a commercial mortar aiming to control microorganisms and improve safety and stability for building applications. ZnO/Pal nanocomposites were obtained by sol-gel methods at pH 7 and 11 and were calcined at 250 °C and 400 °C to evaluate different synthesis parameters. The mortar/ZnO/Pal composite was obtained using 5% (by weight) ZnO/Pal hybrid mixed with a commercial mortar. The results show that pH and calcination temperature influenced the properties of ZnO/Pal. ZnO was observed in the ZnO/Pal samples during the wurtzite phase by analyzing the XRD patterns. FTIR spectra illustrated the interactions between ZnO nanoparticles and the fibrous clay mineral. TG-DTG analysis showed the thermal events of Pal before and after zinc incorporation. Scanning electron microscopy (SEM) evaluated ZnO morphology as spherical in shape and dispersed on the fibers of the clay minerals, which presented needle-like morphology. ZnO/Palygorskite showed a possible antibacterial effect when used in mortar formulation. The mortar/ZnO/Pal composites were effective against Escherichia coli and Staphylococcus aureus bacteria when tested by the direct contact method in darkness and in visible light and could be an alternative antimicrobial material for building surfaces.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationRosendo, F.R.G.V., Pinto, L.I.F., Lima, I.S., Trigueiro, P., Honório, L.M.C., Fonseca, M.G…., Osajima, J.A. (2020). Antimicrobial efficacy of building material based on ZnO/palygorskite against gram-negative and gram-positive bactéria. Applied Clay Science, 188pt_PT
dc.identifier.doi10.1016/j.clay.2020.105499pt_PT
dc.identifier.eid85079644202
dc.identifier.issn0169-1317
dc.identifier.urihttp://hdl.handle.net/10400.14/29794
dc.identifier.wos000521389200003
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationCNPq-422476/2016-1pt_PT
dc.subjectSol-gel techniquept_PT
dc.subjectZnOpt_PT
dc.subjectPalygorskitept_PT
dc.subjectMortarpt_PT
dc.subjectAntibacterial activitypt_PT
dc.titleAntimicrobial efficacy of building material based on ZnO/palygorskite against gram-negative and gram-positive bacteriapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleApplied Clay Sciencept_PT
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT

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