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33. Transparent titania-zirconia thin films for self-cleaning and photocatalytic applicationNives Vodišek, Kandalam Ramanujachary, Vlasta Brezová, Urška Lavrenčič Štangar, 2016, objavljeni povzetek znanstvenega prispevka na konferenci Opis: Thin films were prepared by sol-gel process, where different amount of zirconia were added to titania.
Photocatalytic activity of thin films was measured by two methods i) determination of degradation ration of methyl stearate with measuring the contact angle and ii) formation of hydroxyterephthalic acid was measured by spectrofluorometer.
Prepared samples were characterized by UV-Vis spectrophotometer, SEM, XRD, FT-IR ATR, and BET.
The result of measurements of photocatalytic activity shows that the highest activity has a sample without addition of zirconia, but mechanical stability of that sample is worse. Ključne besede: photocatalysis, ZrO2/ TiO2, thin films, self-cleaning, low-temperature, sol-gel process Objavljeno v RUNG: 14.03.2017; Ogledov: 5075; Prenosov: 202 Celotno besedilo (462,52 KB) |
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36. EFFECT OF DIFFERENT LOADING CONCENTRATIONS OF Cu AND Zr METAL IONS ON PHOTOCATALYTIC ACTIVITY OF P25 : MASTER’S THESISIkram Muhammad, magistrsko delo Ključne besede: odpadne vode, degradacija, ki onesnažuje, organska predhodniki, TiO2 photocatalysis, fotokatalitsko aktivnost, Zr in Cu dopantov, superoksid anioni, hidroksilni radikal, metilen modro Objavljeno v RUNG: 06.02.2017; Ogledov: 6217; Prenosov: 253 Celotno besedilo (2,94 MB) |
37. Photocatalytic degradation of gaseous toluene by using TiO2 nanoparticles immobilized on fiberglass clothMinoo Tasbihi, Ioana Cǎlin, Andraž Šuligoj, Mattia Fanetti, Urška Lavrenčič Štangar, 2017, izvirni znanstveni članek Ključne besede: Titanium dioxide, immobilization, toluene, fiberglass cloth, gaseous photocatalysis Objavljeno v RUNG: 25.01.2017; Ogledov: 4805; Prenosov: 0 Gradivo ima več datotek! Več... |
38. Correlations between photocatalytic activity and chemical structure of Cu-modified TiO2–SiO2 nanoparticle compositesT. Čižmar, Urška Lavrenčič Štangar, Iztok Arčon, 2016, izvirni znanstveni članek Opis: Copper-modified TiO2–SiO2photocatalysts were prepared by sol–gel method based on organic copper,silicon and titanium precursors. Copper concentration varied from 0.1 to 3.0 mol%. A widely appliedmodel reaction of photocatalytic oxidation of terephtalic acid (TPA) in water solution was used in order toevaluate the catalytic activities of elaborated samples. The crystal structures of the titania components ofall tested titania–silica species were studied using XRD analysis. The influence of Cu2+cation incorporationon the crystal structure of titania, as well as the chemical states and the neighbouring structures of coppercations, have been examined by means of Cu K-edge EXAFS and XANES analysis. The experimental datashow that there is a ten times increase in photocatalytic activity when TiO2–SiO2matrix is modified with0.1 mol% of Cu. It can be supposed that an enhancement of photocatalytic activity of low-concentratedcopper-modified titania–silica nanocomposites is probably due to a close attachment of Cu2+cationsto the surfaces of photocatalytically active TiO2nanoparticles. In this case, Cu2+cations may possiblyact as free electron traps reducing the intensity of recombination between opposite free charge carriers(electrons, holes) available at the photocatalyst’s surface. Ključne besede: Cu-modified TiO2–SiO2photocatalysts, Titanium dioxide, Metal doping, Cu K-edge XANES, EXAFS, Photocatalytic activitya Objavljeno v RUNG: 17.01.2017; Ogledov: 5183; Prenosov: 0 Gradivo ima več datotek! Več... |
39. Reuse of TiO2-based catalyst for solar driven water treatment; thermal and chemical reactivationSubhan Salaeh, Marin Kovacic, Dominik Kosir, Hrvoje Kušić, Urška Lavrenčič Štangar, Dionysios D. Dionysiou, Ana Lončarić Božić, 2017, izvirni znanstveni članek Ključne besede: Solar photocatalysis, TiO2-FeZ, Thermal and chemical reactivation, Ozone, Diclofenac Objavljeno v RUNG: 03.11.2016; Ogledov: 4833; Prenosov: 0 Gradivo ima več datotek! Več... |
40. Hematite-based nanocomposites for light-activated applications: Synergistic role of TiO2 and Au introductionGiorgio Carraro, Chiara Maccato, Alberto Gasparotto, Michael E.A Warwick, Cinzia Sada, Stuart Turner, Antonio Bazzo, Teresa Andreu, Olena Pliekhova, Dorota Korte, Urška Lavrenčič Štangar, Gustaaf Van Tendeloo, Joan Ramón Morante, Davide Barreca, 2017, izvirni znanstveni članek Ključne besede: Fe2O3-TiO2-Au, Plasma enhanced-chemical vapor deposition, Sputtering, Photocatalysis Objavljeno v RUNG: 10.10.2016; Ogledov: 5165; Prenosov: 0 Gradivo ima več datotek! Več... |