20.500.12556/RUL-137095 Importance of protocol design for suitable green in situ synthesis of ZnO on cotton using aqueous extract of Japanese knotweed leaves as reducing agent This work presents two protocols for the green in situ synthesis of zinc oxide nanoparticles (ZnO-NP) on cotton with the aim to develop sustainable cotton fabric with an ultraviolet protection factor (UPF). The protocols differed in the order of immersing cotton fabric in reactive solutions of three batches, i.e., precursor (0.1 M zinc acetate dihydrate), reducing agent (aqueous extract of Japanese knotweed leaves) and alkali (wood ash waste). The scanning electron microscope (SEM) results showed that ZnO-NP were successfully synthesised on cotton using both protocols; however, only the protocol where cotton was first immersed in alkali, then in the precursor and, lastly, in the reducing agent enabled very high UPF and higher amount of Zn present on the sample. Due to the different order of cotton fabric immersion in the reactive solutions, dissimilar morphology of the ZnO particles was observed, which resulted in different UV blocking abilities of the samples. The antioxidant analysis (DPPH) showed that the natural reducing agent prepared from Japanese knotweed leaves has very high antioxidant activity, which is attributed to phenolic compounds present in the plant. The reflectance spectroscopy results confirmed that the colour yield and colour of the samples did not influence the UPF value. This protocol is an example of green circular economy where waste materials of invasive alien plant species and pellet heating was used as a natural source of phytochemicals, for the direct synthesis of ZnO-NP to develop cotton fabric with UV-protective properties. Japanese knotweed leaves zinc oxide nanoparticles in situ green synthesis cotton Japonski dresnik cinkov oksid in situ zelena sinteza bombaž ZnO true false true Angleški jezik Slovenski jezik Članek v reviji 2022-06-01 10:54:02 2022-06-01 10:54:03 2022-09-15 04:14:39 0000-00-00 00:00:00 2022 0 0 10 str. iss. 2, art. 143 Vol. 13 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 677 1999-4907 10.3390/f13020143 94296579 forests-13-00143.pdf forests-13-00143.pdf 1 637F58C25BF24AFF89DBAA241A09C99C b585c2477fd13cf16b3ad434df5351caa71d9ad0a4a15a02c2e8c65b76414e39 8e0c7f4f-e188-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156949 https://www.mdpi.com/1999-4907/13/2/143 1 3dd72cc0-e188-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156947 Naravoslovnotehniška fakulteta 0 0 0