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dc.creatorDostanić, Jasmina
dc.creatorHuš, M.
dc.creatorLončarević, Davor
dc.date.accessioned2020-07-20T21:34:55Z
dc.date.available2020-07-20T21:34:55Z
dc.date.issued2020
dc.identifier.issn1001-0742
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/3600
dc.description.abstractUnderstanding the degradation behavior of azo dyes in photocatalytic wastewater treatment is of fundamental and practical importance for their application in textile-processing and other coloration industries. In this study, quantum chemistry, as density functional theory, was used to elucidate different degradation pathways of azo pyridone dyes in a hydroxyl radical (HO•) initiated photocatalytic system. A series of substituted azo pyridone dyes were synthesized by changing the substituent group in the para position of the benzene moiety, ranging from strong electron-donating to strong electron-withdrawing groups. The effect of dye molecular structure on the photocatalytic degradation reaction mechanism was analyzed and quantification of substituent effects on the thermodynamic and kinetics parameters was performed. Potential energy surface analysis revealed the most susceptible reaction site for the HO• attack. The calculated reaction barriers are found to be strongly affected by the nature of substituent group with a good correlation using Hammett σp constants and experimentally determined reaction rates. The stability of pre-reaction complexes and transition state complexes were analyzed applying the distortion-interaction model. The increased stability of the transition state complexes with the distancing from the substituent group has been established.en
dc.language.isoensr
dc.publisherElseviersr
dc.relationSlovenian Research Agency (research core funding No. P2-0152)sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200026/RS//sr
dc.rightsrestrictedAccesssr
dc.sourceJournal of Environmental Sciencessr
dc.subjectQuantum chemical calculationsr
dc.subjectDensity functional theorysr
dc.subjectAzo dyesr
dc.subjectReaction mechanismsr
dc.subjectPhotocatalytic degradationsr
dc.subjectHydroxyl radicalsr
dc.subjectHammett equationsr
dc.subjectSubstituent effectsr
dc.titleEffect of substituents in hydroxyl radical-mediated degradation of azo pyridone dyes: Theoretical approaches on the reaction mechanismen
dc.typearticlesr
dc.rights.licenseARRsr
dcterms.abstractДостанић, Јасмина; Лончаревић, Давор; Хуш, М.;
dc.rights.holderElseviersr
dc.citation.volume98
dc.citation.spage14
dc.citation.epage21
dc.citation.rankM21~
dc.identifier.doi10.1016/j.jes.2020.05.022
dc.identifier.scopus2-s2.0-85086140433
dc.identifier.wos000582127500002
dc.type.versionpublishedVersionsr


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