Riyatun, Adiana Musadewi, Utari, Nurdiyantoro Putra Prasetya, ST.Ulfawanti Intan Subadra, Nandang Mufti, Markus Diantoro, Munasir, Ahmad Taufiq, Budi Purnama
The silver-substituted cobalt ferrite nanoparticles (AgCFO-NPs) have been successfully synthesized using green-coprecipitated method with turmeric (Curcuma Longa Linn) extract with utilizing a fine-sediment iron-sand as Fe3+ ions source. XRD results show the spectral data is in accordance with ICDD No. 22–1086, thus confirming that the cobalt ferrite nanocrystal phase is present. Crystallite size calculation increase D = 22.00 nm to 31.45 nm with an increasing annealing temperature (Ta = 100 °C to 500 °C). Characteristic FTIR curve show adsorption-peak band around v1 = ∼569.99 cm−1 and v2 = ∼399.28 cm−1 indicate to the intrinsic vibration of metal–oxygen bonds at the tetrahedral and octahedral sites of the spinel structure. Furthermore, temperature of annealing Ta tunes the magnetic properties of the AgCFO-NPs. SEM result show that the green synthesis realizes nanoparticles wrapped into large granules (Ta = 100 °C and 200 °C) and then the granular wrapping gradually disappears with the increase of the Ta (300 °C, 400 °C and 500 °C). Finally, antibacterial performance (for Staphylococcus aureus and Escherichia coli) show that the highest zone-inhibition of 16.70 mm (at 300 °C) in S. aureus and 14.88 mm (at 200 °C) in E. coli are observed, respectively. Here, nanoparticles utilizing fine-sediment iron-sand are promising as an effective and biocompatible antibacterial agent in next-future medical application. © 2025 The Author(s)
Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret, Jl. Ir. Sutami 36A, Kentingan, Jebres, Surakarta, 57126, Indonesia; Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Tanjungpura, Jl.Prof. Dr. H. Hadari Nawawi, Pontianak, 78124, Indonesia; Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia; Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Surabaya, Ketintang, Gayungan, Surabaya, 60231, Indonesia
