20.500.12556/DiRROS-15810 Controlled growth of ZnO nanoparticles using ethanolic root extract of Japanese knotweed photocatalytic and antimicrobial properties Synthesis of zinc oxide (ZnO) nanoparticles (NPs) was mediated by plant extracts to assist in the reduction of zinc atoms during the synthesis and act as a capping agent during annealing.The preparation used ethanolic extracts from the roots of Japanese knotweed (Fallopia japonica). Two major outcomes could be made. (i)A synergistic effect of multiple polyphenolic components in the extract is needed to achieve the capping effect of crystallite growth during thermal annealing at 450 °C characterized by an exponential growth factor (n) of 4.4 compared to n = 3 for bare ZnO. (ii) Synergism between the ZnO NPs and plant extracts resulted in superior antimicrobial activity against both Gram-positive bacteria, e.g., Staphylococcus aureus, and Gram-negative bacteria, e.g., Escherichia coli and Campylobacter jejuni. The materials were also tested for their antimicrobial activity against S. aureus under ultraviolet (UV) illumination. Also here, the photocatalyst prepared with plant extracts was found to be superior. The residues of the plant extract molecules on the surface of the catalyst were identified as the main cause of the observed differences, as proved by thermal gravimetry. Such a preparation using ethanolic extract of Fallopia japonica could serve as a more controlled synthesis of ZnO and potentially other metal oxides, with low environmental impact and high abundance in nature. nanodelci fotokataliza cinkov oksid japonski dresnik protimikrobno delovanje true false true RSC Publishing RSC advances Angleški jezik Slovenski jezik © 2022 The Author(s) Neznano 2022-11-18 10:34:34 2022-11-21 12:44:41 2022-11-22 03:36:34 0000-00-00 00:00:00 2022 0 0 Soavtorji: Ajda Kunčič, Lev Matoh, Sonja Smole Možina, Martin Šala, Andraž Šuligoj; Nasl. z nasl. zaslona; Opis vira z dne 10. 11. 2022; Objavljeno na spletu: 1. nov. 2022; str. 31235-31245 iss. 48 Vol. 12 2022 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 2022-11-01 661.847ʼ02:547.9:544.526.5:579.24 2046-2069 10.1039/d2ra04202a 128813059 https://pubs.rsc.org/en/content/articlelanding/2022/RA/D2RA04202A 1 d4c63423-671b-11ed-a69a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20911 RAZ_Ravbar_Miha_2022.pdf RAZ_Ravbar_Miha_2022.pdf 1 9F5B2FD3D78299EDB2CAC95A7377C693 5c30cfa0bf299ef7cbc8c46bc722ed7e3bebafb91edd98bed200524a273968d4 593db9d7-671e-11ed-a69a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=20912 Kemijski inštitut 0 0 0