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    <ns1:title language="sr">Nanomaterijali na bazi cirkonijum(iv)-oksida: sinteza, karakterizacija i primena u fotokatalizi pod dejstvom simuliranog sunčevog zračenja</ns1:title>
    <ns2:subtitle language="sr">doktorska disertacija</ns2:subtitle>
    <ns2:alt_title language="en">Nanomaterials based on zirconium(iv) oxide: synthesis, characterization and application in photocatalysis under simulated solar light : doctoral dissertation</ns2:alt_title>
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    <ns1:description language="sr">Predmet istraživanja ove doktorske disertacije je razvoj metoda sinteze nanomaterijala nabazi cirkonijum(IV)-oksida (ZrO2), karakterizacija dobijenih materijala primenomrazličitih fizičkohemijskih metoda kao i ispitivanje mogućnosti njihove primene ufotokatalitičkoj razgradnji model jedinjenja pod uticajem simuliranog sunčevog zračenja.Prvi deo teze se odnosi na ispitivanje strukturnih, morfoloških, površinskih, optičkih ifotokatalitičkih svojstava nanomaterijala na bazi ZrO2 velike specifične površinesintetisanih primenom hidrotermalne metode. U cilju dobijanja uzoraka što većespecifične površine, tokom sinteze u strukturu ZrO2 ugrađeni su joni silicijuma (Si4+).Čist ZrO2 odlikuje prisustvo monoklinične kristalne faze i veličina čestica od oko 20 nm.Ugrađivanje jona Si4+ u kristalnu strukturu ZrO2 uzrokuje stabilizaciju metastabilnetetragonalne faze i smanjenje veličine čestica ZrO2. Ugrađivanje jona Si4+ takođerezultuje povećanjem (oko 7 puta) specifične površine i smanjenjem efektivnogenergetskog procepa sintetisanih ZrO2 nanomaterijala, od 5 eV za čist ZrO2 do 3,8 eV zadopirane uzorke. FTIC merenja su dokazala prisustvo Zr-O-Si veza u uzorcima. Svi ZrO2uzorci su pokazali značajnu fotokatalitičku aktivnost u degradaciji 2,4,6-trihlorfenola poduticajem simuliranog sunčevog zračenja koja je povećana ugradnjom Si4+ jona u strukturuZrO2...</ns1:description>
    <ns1:description language="en">The subject of this PhD thesis is the synthesis of nanomaterials based on zirconium(IV)oxide (ZrO2), their characterization by various physicochemical methods, as well as aninvestigation of their potential application in the photocatalytic degradation of selectedmodel compounds under simulated solar light.The first section of the thesis refers to the investigation of structural, morphological,surface, optical and photocatalityc properties of ZrO2 nanomaterials with high specificsurface area synthesized using hydrothermal method. In order to gain as high specificsurface area as possible, Si4+ ions were introduced in ZrO2 matrix during synthesis. PureZrO2 crystallizes in a monoclinic crystalline phase with particles of approximately 20 nmin size. The incorporation of Si4+ ions resulted in the stabilization of the tetragonalcrystalline phase and the reduction of particle sizes. Furthermore, doping ZrO2 matrixwith Si4+ ions resulted in an increase in specific surface area (about seven times) and adecrease in effective band gap of ZrO2 powders from 5 eV for pure ZrO2 to 3.8 eV fordoped samples. FTIR measurements proved existence of Zr-O-Si bond in the synthesizedsamples. All ZrO2 powders showed significant photocatalytic activity regardingdegradation of 2,4,6-triclorophenol under simulated solar light, which increases with theincorporation of Si ions in the host matrix...</ns1:description>
    <ns1:description language="sr">Fizička hemija - Fizička hemija materijala / Physical Chemistry - Physical Chemistry of Materials  Datum odbrane: 10.11.2022. </ns1:description>
    <ns1:keyword language="sr">ZrO2, nanomaterijali, nanokompoziti, fotokataliza, 2,4,6-trihlorofenol</ns1:keyword>
    <ns1:keyword language="en">ZrO2, nanomaterials, nanocomposites, fotocatalysis, 2,4,6-trichlorophenol</ns1:keyword>
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        <ns3:firstname> Milica V., 1986-</ns3:firstname>
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