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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, published scientific conference contribution abstract Abstract: 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. Keywords: photocatalysis, ZrO2/ TiO2, thin films, self-cleaning, low-temperature, sol-gel process Published in RUNG: 14.03.2017; Views: 5119; Downloads: 203 Full text (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, master's thesis Keywords: odpadne vode, degradacija, ki onesnažuje, organska predhodniki, TiO2 photocatalysis, fotokatalitsko aktivnost, Zr in Cu dopantov, superoksid anioni, hidroksilni radikal, metilen modro Published in RUNG: 06.02.2017; Views: 6259; Downloads: 253 Full text (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, original scientific article Keywords: Titanium dioxide, immobilization, toluene, fiberglass cloth, gaseous photocatalysis Published in RUNG: 25.01.2017; Views: 4832; Downloads: 0 This document has many files! More... |
38. Correlations between photocatalytic activity and chemical structure of Cu-modified TiO2–SiO2 nanoparticle compositesT. Čižmar, Urška Lavrenčič Štangar, Iztok Arčon, 2016, original scientific article Abstract: 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. Keywords: Cu-modified TiO2–SiO2photocatalysts, Titanium dioxide, Metal doping, Cu K-edge XANES, EXAFS, Photocatalytic activitya Published in RUNG: 17.01.2017; Views: 5227; Downloads: 0 This document has many files! More... |
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, original scientific article Keywords: Solar photocatalysis, TiO2-FeZ, Thermal and chemical reactivation, Ozone, Diclofenac Published in RUNG: 03.11.2016; Views: 4877; Downloads: 0 This document has many files! More... |
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, original scientific article Keywords: Fe2O3-TiO2-Au, Plasma enhanced-chemical vapor deposition, Sputtering, Photocatalysis Published in RUNG: 10.10.2016; Views: 5208; Downloads: 0 This document has many files! More... |