Nanostructure, Band Gap, and Antibacterial Activity of Spinel Fe2MO4/OO Magnetic Fluids. Issue 1 (May 2019)

• Record Type: Journal Article
• Authors: Millaty Abadiah, Nur; Yuliantika, Defi; Amalia Hariyanto, Yuanita; Eko Saputro, Rosy; Masruroh, ; Taufiq, Ahmad; Soontaranoon, Siriwat
• Is Part Of: IOP conference series. Volume 276:Issue 1(2019)
• Publication Date: 2019-05
• Subjects: MFe2O4 -- spinel -- doping -- nanostructure -- antibacterial activity; Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/276/1/012064
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: This research aimed at investigating Fe2 MO4 ferrofluids nanostructure, with M was Fe, Ti and Cr. Fe2 MO4 nanoparticles were synthesized through coprecipitation method, and the phase and crystallinity were analyzed using XRD instrument. The obtained results showed the Fe3 O4 phase, but there was a shift in diffraction peak position contributed by the doping of Ti 2+ and Cr 3+ ions. Furthermore, a similar change occurred in the lattice parameter, crystal volume, and particle size. The particle sizes of Fe3 O4, Fe2 TiO4, and Fe2 CrO4 particles were 10.2, 13.4, and 6.9 nm, respectively. The functional groups of the Fe2 MO4 /OO ferrofluids were characterized using FTIR and obtained the Fe-O stretching band shift due to the modification of structure. Furthermore, FTIR analysis was used as a reference to confirm functional groups of the ferrofluids. The absorbance data collection was performed through the characterization using UV-Vis instrument, and there was intervalence charge transfer at a wavelength near infra-red indicating there was Fe element and nanoparticle interface which raised an optimum absorption at the interval of 400-550 nm. Furthermore, through the obtained absorbance data, there was an energy gap of 2.2-2.24 eV. Interestingly, the results of antibacterial testing results through the dilution method showed a modification of structure could increase the antibacterial activity of the Fe2 MO4 /OO ferrofluids by minimizing the percentage of surviving colony number.