20.500.12556/DiRROS-15836 Metal and non-metal modified titania the effect of phase composition and surface area on photocatalytic activity The application of TiO 2 photocatalysis in various environmental fields has been extensively studied in the last decades due to its ability to induce the degradation of adsorbed organic pollutants. In the present work, TiO 2 powders doped and co-doped with sulfur and nitrogen and modified with platinum were prepared by particulate sol-gel synthesis. PXRD measurements revealed that the replacement of HCl with H 2SO4 during synthesis reduced the size of the crystallites from ~ 30 nm to ~20 nm, increasing the surface area from ~44 m2/g to ~80 m2/g. This is consistent with the photocatalytic activity of the samples and the measured photocurrent behavior of the photocatalysts. The results showed that the prop- erties of the powders (i.e., surface area, crystallite size, photocurrent behavior) depend strongly not only on the type but also on the amount of acid and dopants used in the synthesis. Doping, co-doping and modification of TiO 2 samples with nitrogen, sulfur and platinum increased their photocatalytic activity up to 6 times. Zaradi zmožnosti razgradnje adsorbiranih organskih onesnažil se fotokatalizator TiO2 v zadnjih desetletjih veliko preučuje za različne okoljske aplikacije. V tem delu predstavljamo z žveplom in dušikom dopirane oz. kodopirane ter s platino modificirane prahove TiO2, ki smo jih pripravili po koloidnem sol-gel postopku. PXRD meritve kažejo, da zamenjava HCl s H2SO4 med sinteznim postopkom zmanjša velikost kristalitov iz ~30 nm na ~20 nm, pri čemer se poveča tudi specifična površina iz ~44 m2/g na ~80 m2/g. Opažanja korelirajo z izmerjeno fotokatalitsko aktivnostjo vzorcev in izmerjenim fototokom. Rezultati kažejo, da so lastnosti prahov (specifična površina, velikost kristalitov, obnašanje fototoka) odvisne ne le od vrste uporabljene kisline, temveč tudi od njene količine in uporabljenega dopanta. Dopiranje z žveplom, kodopiranje z žveplom in dušikom in modifikacija prahov TiO2 s platino povečajo fotokatalitsko aktivnost tudi do šestkrat. titanium dioxide powders doping photocatalysis photocurrent SEM prahovi dopiranje fototok SEM true false true Slovensko kemijsko društvo, =Slovenian Chemical Society Angleški jezik Slovenski jezik Copyright (c) 2020 Boštjan Žener, Lev Matoh, Martin Reli, Andrijana Sever Škapin, Romana Cerc Korošec Neznano 2022-11-23 13:22:09 2023-05-04 09:28:20 2023-05-05 03:35:30 0000-00-00 00:00:00 2022 0 0 Nasl. z nasl. zaslona; Soavtorji: Lev Matoh, Martin Reli, Andrijana Sever Škapin, Romana Cerc Korošec; Opis vira z dne 21. 2. 2022; str. 217-226 no. 1 Vol. 69 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2022-03-15 546.82-31:544.526.5 1580-3155 10.17344/acsi.2021.7200 98258947 https://journals.matheo.si/index.php/ACSi/article/view/7200 1 2208191c-6b21-11ed-a69a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20944 RAZ_Zener_Bostjan_2022.pdf RAZ_Zener_Bostjan_2022.pdf 1 698E1F10822703B91FF8C84C8845C5CA 7df69f75509a087a62aee4533fe3f7f45b321b22f1e42477bc35989ef732b6ef 86bdc976-8b5a-11ed-b359-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=21205 Zavod za gradbeništvo Slovenije 0 0 0