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The influence of the interaction between iron and nickel on electrochemical behavior of electrodes based on bentonites modified with acids and polyhydroxy cations.

dc.contributor.advisorVukelić, Nikola
dc.contributor.otherMilutinović-Nikolić, Aleksandra
dc.contributor.otherCvjetičanin, Nikola
dc.creatorMudrinić, Tihana M.
dc.date.accessioned2016-08-27T16:07:07Z
dc.date.available2016-08-27T16:07:07Z
dc.date.available2020-07-03T09:33:20Z
dc.date.issued2016-05-13
dc.identifier.urihttp://eteze.bg.ac.rs/application/showtheses?thesesId=3656
dc.identifier.urihttp://nardus.mpn.gov.rs/handle/123456789/6375
dc.identifier.urihttps://fedorabg.bg.ac.rs/fedora/get/o:12460/bdef:Content/download
dc.identifier.urihttp://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=48110607
dc.description.abstractProces elektrooksidacije organskih zagađujućih supstanci se intenzivno ispituje kao jedan od alternativnih načina njihove detekcije i degradacije. Jedan od glavnih problema koji se javljaju tokom elektrooksidacije fenola je formiranje izolacionog polimernog filma zbog koga se elektrode veoma brzo deaktiviraju. Trenutno se u ovoj oblasti, kao istraživački cilj, postavlja dobijanje elektrodnog materijala koji bi u procesu elektrooksidacije fenola istovremeno ispoljio visoku aktivnost i stabilnost. Predmet rada ove doktorske disertacije je usmeren na modifikaciju smektitom bogate, bentonitne gline, iz do sada manje ispitanog domaćeg ležišta Mečji Do (polazni uzorka), u smislu dobijanja Fe i Fe,Ni–modifikovanih bentonita koji su nakon karakterizacije ispitivani kao elektrodni materijali u reakciji elektrooksidacije fenola. Sintetisane su tri grupe materijala. Prva grupa materijala dobijena je tretiranjem uzorka bentonita rastvorima HCl različitih koncentracija pri čemu su ostali uslovi bili isti. Druga grupa materijala je dobijena tretiranjem odabranog kiselotretiranog uzorka solima nikla (nikl(II) nitrata i nikl(II) acetilacetonata) nakon čega je sledio termički tretman. Treća grupa materijala je dobijana procesom pilarenja polihidroksi katjonima aluminijuma, gvožđa i nikla različitih molarnih odnosa. Elektrode na bazi dobijenih materijala dobijene su nanošenjem tankog sloja svakog pojedinačnog uzorka na površinu elektrode od staklastog ugljenika (GC). Cilj rada je bio postizanje što veće stabilnosti GC elektroda u reakciji elektrooksidacije fenola korišćenjem ispitivanih modifikovanih bentonita. Polazni i modifikovani uzorci su karakterisani različitim fizičkohemijskim metodama (hemijska, rendgenostrukturna, infracrvena, termička i teksturalna analiza i EPR spektroskopija). Metoda ciklične voltametrije je korišćena za ispitivanja uticaja modifikacije bentonita na elektrohemijsko ponašanje elektroda na bazi modifikovanih bentonita. Pokazano je da su u polaznom bentonitu (MD) prisutni smektiti kao dominantne faze, sa odnosom monmorijonita prema bajdelitu 3:2, dok su kristobalit, feldspat, kvarc i kalcit prateći minerali...sr
dc.description.abstractThe process of the electro-oxidation of organic pollutants has been intensively examined as one of the alternative methods of their detection and degradation. One of the major problems that occur during the electro-oxidation of phenol is the formation of insulating polymer film which causes rapid deactivation of electrode. Currently, the main goal in this research area is the obtention of electrode materials which would show simultaneously high activity and stability. The subject of this doctoral dissertation is focused on the modification of bentonite – clay rich in smectite – from the Mečji Do domestic, heretofore seldom investigated deposit (starting sample). The modifications that had been performed resulted in Fe and Fe,Ni-modified bentonite materials, subsequently characterized and tested as electrode material in the reaction of the electro-oxidation of phenol. Three groups of materials were synthesized in this work. The first group was obtained by treating bentonite samples with HCl solutions of different concentrations, while other treatment conditions were the same. The second group of materials was obtained by the treatment of a selected acid treated bentonite with different nickel salts (nickel (II) nitrate and nickel (II) acetylacetonate) followed by thermal treatment. The third group of materials was obtained by the pillaring of bentonite using aluminum, iron and nickel polyhydroxy cations in various molar ratios. Electrodes based on the synthesized materials were obtained by coating a glassy carbon (GC) electrode with thin layer of each of the synthesized samples. The aim of this dissertation was to achieve higher stability of the GC electrode in the reaction of electro-oxidation of phenol using the investigated modified bentonites. The starting and modified bentonite samples were characterized using different physical-chemical methods (chemical, X-ray diffraction, infrared, thermal and textural analysis, as well as EPR spectroscopy). The influence of the modification of bentonite on the electrochemical behavior of the corresponding modified electrode was examined using cyclic voltammetry...en
dc.formatapplication/pdf
dc.languagesr
dc.publisherУниверзитет у Београду, Факултет за физичку хемијуsr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172026/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45001/RS//
dc.rightsopenAccessen
dc.sourceУниверзитет у Београдуsr
dc.subjectbentonitsr
dc.subjectBentoniteen
dc.subjectmodifikacije bentonitasr
dc.subjectpilarenjesr
dc.subjectinterakcija gvožđe niklsr
dc.subjectbentonitom modifikovane elektrodesr
dc.subjectelektrooksidacija fenolasr
dc.subjectstabilnost elektrodasr
dc.subjectModified bentoniteen
dc.subjectPillaringen
dc.subjectNickel-iron interactionen
dc.subjectBentonite modified electrodeen
dc.subjectPhenol electro-oxidationen
dc.subjectElectrode stabilityen
dc.titleUticaj interakcije gvožđa i nikla na elektrohemijsko ponašanje elektroda na bazi bentonita modifikovanih kiselinom i polihidroksi katjonimasr
dc.titleThe influence of the interaction between iron and nickel on electrochemical behavior of electrodes based on bentonites modified with acids and polyhydroxy cations.en
dc.typedoctoralThesis
dc.rights.licenseBY-NC-ND
dcterms.abstractВукелић, Никола; Милутиновић-Николић, Aлександра; Цвјетичанин, Никола; Мудринић, Тихана М.; Утицај интеракције гвожђа и никла на електрохемијско понашање електрода на бази бентонита модификованих киселином и полихидрокси катјонима; Утицај интеракције гвожђа и никла на електрохемијско понашање електрода на бази бентонита модификованих киселином и полихидрокси катјонима;
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/20722/Disertacija4307.pdf
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/20723/Mudrinic_Tihana_M.pdf


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