20.500.12556/DiRROS-19794 Novel ▫$TiO_2$▫-supported gold nanoflowers for efficient photocatalytic ▫$NO_x$▫ abatement t: In this study, we pioneered the synthesis of nanoflower-shaped TiO2 -supported Au photocatalysts and investigated their properties. Au nanoflowers (Au NFs) were prepared by a Na-citrate and hydroquinone-based preparation method, followed by wet impregnation of the derived Au NFs on the surface of TiO2 nanorods (TNR). A uniform and homogeneous distribution of Au NFs was observed in the TNR + NF(0.7) sample (lower Na-citrate concentration), while their distribution was heterogeneous in the TNR + NF(1.4) sample (higher Na-citrate concentration). The UV-Vis DR spectra revealed the size- and shape-dependent optical properties of the Au NFs, with the LSPR effect observed in the visible region. The solid-state EPR spectra showed the presence of Ti3+, oxygen vacancies and electron interactions with organic compounds on the catalyst surface. In the case of the TNR + NF(0.7) sample, high photocatalytic activity was observed in the H2 -assisted reduction of NO2 to N2 at room temperature under visible-light illumination. In contrast, the TNR + NF(1.4) catalyst as well as the heat-treated samples showed no ability to reduce NO2 under visible light, indicating the presence of deformed Au NFs limiting the LSPR effect. These results emphasized the importance of the choice of synthesis method, as this could strongly influence the photocatalytic activity of the Au NFs kataliza fotokataliza titanov dioksid svetloba impregnacija true false true MDPI Molecules Angleški jezik Slovenski jezik © 2024 by the authors Neznano 2024-07-25 08:10:44 2024-07-25 08:22:18 2024-07-26 04:28:29 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Opis vira z dne 22. 7. 2024; str. 1-26 [article no.] 3333 Vol. 29 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-01-01 544.3/.4 1420-3049 10.3390/molecules29143333 202304771 https://www.mdpi.com/1420-3049/29/14/3333 1 dfce0085-4a3b-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27411 RAZ_Slapnicar_Spela_2024.pdf RAZ_Slapnicar_Spela_2024.pdf 1 D7CCFDF2A7C1469AAA2AF1553110FBF2 51dffd39d28b141004e92a8a2db3d474be661d948bb0f4d9b7d8b93dd02fe773 4f67920b-4a3d-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27412 Kemijski inštitut 0 0 0