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Natural dye-sensitized ZnO nano-particles as photo-catalysts in complete degradation of E. coli bacteria and their organic content

hal.structure.identifierDepartment of Chemistry
dc.contributor.authorZYOUD, Ahed
hal.structure.identifierClinical Biology Laboratory
dc.contributor.authorDWIKAT, Majdi
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorAL-SHAKHSHIR, Samar
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorATEEQ, Sondos
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorSHTEIWI, Jumana
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorZU’BI, Amani
hal.structure.identifierCollege of Pharmacy and Nutrition
dc.contributor.authorHELAL, Muath H. S.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCAMPET, Guy
hal.structure.identifierDansuk Industrial Co.
dc.contributor.authorPARK, Daehoon
hal.structure.identifierDepartment of Materials System Engineering
dc.contributor.authorKWON, Hansang
hal.structure.identifierEnergy Materials Laboratory
dc.contributor.authorKIM, Tae Woo
hal.structure.identifierJerusalem Pharmaceutical Co.
dc.contributor.authorKHAROOF, Maher
hal.structure.identifierDepartment of Physiology, Pharmacology and Toxicology
dc.contributor.authorSHAWAHNA, Ramzi
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorHILAL, Hikmat S.
dc.date.issued2016-09
dc.identifier.issn1010-6030
dc.description.abstractEnThis communication describes for the first time how nano-size particles, sensitized with natural dye molecules of anthocyanin, can be used as catalysts in photo-degradation of gram negative Escherichia coli bacteria in water. The naked ZnO nano-particles degraded up to 83% of the bacteria under solar simulator light, while the dye-sensitized particles increased the bacterial loss by ∼10%. Solar simulator light includes about 5% of UV tail (shorter than 400 nm) which means that both UV and visible light (longer than 400 nm) radiations could be involved. When a cut-off filter was used, the naked ZnO caused only 40% bacterial loss, in accordance with earlier literature that described killing of bacteria with ZnO particles both in the dark and under light. With the cut-off filter, the sensitized ZnO particles caused higher than 90% bacterial loss, which confirms sensitization of the ZnO particles to visible light. Moreover, the results show that the catalyzed photo-degradation process causes mineralization of the bacteria and their organic internal components which leach out by killing. The catalyst can be recovered and reused losing ∼10% of its activity each time due to mineralization of the dye molecules. However, catalyst activity can be totally regained by re-sensitizing it with the anthocyanin dye. The effects of different experimental conditions, such as reaction temperature, pH, bacterial concentration and catalyst amount together with nutrient broth and saline media, will be discussed together with the role of the sensitizer.
dc.language.isoen
dc.publisherElsevier
dc.subject.enPhoto-degradation
dc.subject.enZnO nano-particles
dc.subject.enAnthocyanin sensitizer
dc.subject.enE. coli
dc.subject.enMineralization
dc.title.enNatural dye-sensitized ZnO nano-particles as photo-catalysts in complete degradation of E. coli bacteria and their organic content
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jphotochem.2016.05.020
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Photochemistry and Photobiology A: Chemistry
bordeaux.page207-216
bordeaux.volume328
bordeaux.peerReviewedoui
hal.identifierhal-01343618
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01343618v1
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