20.500.12556/RUL-164276 Nickel-decorated ZnO nanoparticles for effective solar reduction of hexavalent chromium and removal of selected pharmaceuticals The efficient visible light driven photocatalytic reduction of hexavalent chromium, Cr(VI) was demonstrated using ZnO nanoparticles (NPs) decorated with oxo-clusters of transition metals. The ZnO NPs were synthesized by a facile one-pot solvothermal synthesis followed by a fast microwave-assisted (MW) grafting of transition metals on the surface of NPs. Nickel was found to be the most active transition metal for photocatalytic activity as demonstrated by reduction of Cr(VI) to Cr(III). The optimally grafted samples contained 0.5 wt% Ni and increased photocatalytic activity by almost one-fold. The oxo-clusters did not enter the lattice of ZnO but rather resided on the surface and their efficient bonding to the ZnO surface was proved by Raman, TEM and X-Ray absorption techniques. Influence of MW power was studied and shown that excessive power load leads to formation of elongated structures of ZnO which decreases the photocatalytic activity. It was demonstrated by measuring fluorescent radical products that electrons, efficiently transferred via oxygen, were the main active species in combination with the unchanged oxidation power of holes and $^•$OH in the grafted samples. The applicability of the materials was tested in immobilized plug flow photoreactor system degrading five pharmaceuticals simultaneously where their long-term use was shown. zinc oxide pharmaceuticals grafting long-term use visible light Cr(VI) nanodelci nikelj krom true false true Angleški jezik Slovenski jezik Članek v reviji 2024-10-18 12:02:57 2024-10-18 12:03:02 2024-10-19 04:25:47 0000-00-00 00:00:00 2025 0 0 13 str. art. 161463 Vol. 681 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 539 0169-4332 10.1016/j.apsusc.2024.161463 211967747 1-s2.0-S0169433224021780-main.pdf 1-s2.0-S0169433224021780-main.pdf 1 CFB1D9C25C39FE33448B379B90C527A5 c49a5a9315126034c7217deda5bc734bd64ff4bf148228e916480d4033f66134 64a82cc3-8d38-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=194570 https://www.sciencedirect.com/science/article/pii/S0169433224021780 0 1d959277-8d38-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=194568 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0