Investigation of structural, magnetic and antibacterial activities of CrxFe3−xO4 ferrofluids. (22nd November 2019) - Taufiq, Ahmad
Abstract: This study aimed to investigate the structural, magnetic, and antibacterial activities of Cr x Fe3− x O4 ferrofluids. Cr x Fe3− x O4 nanoparticles were synthesized from iron sand by a co-precipitation method using Cr 3+ ion variants ( x content) of 0, 0.05, 0.1, 0.15, and 0.2. The prepared nanoparticles were then characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), and Fourier transform infrared (FTIR). The results of XRD analysis showed that the addition of Cr + ions caused a shift in the diffraction peak, indicating the successful penetration of Cr + ions into the Fe3 O4 octahedral atomic site. The average particle size of Fe3 O4 nanoparticles determined by TEM morphology analysis was 13.7 nm. In addition, the magnetic properties of Cr x Fe3− x O4 ferrofluids analyzed via VSM showed that the saturation magnetization ranged between 6.95 and 42.71 emu/g, while the magnetic moments were in the range of 7.47 × 10 −19 –19.76 × 10 −19 J/T, which varied with the addition of Cr 3+ ions. Furthermore, an analysis of the antibacterial activities of Cr x Fe3− x O4 ferrofluids revealed that bacterial viability decreased with increase in the number of Cr 3+ ions. Thus, the Cr x Fe3− x O4 ferrofluids prepared from iron sand are potentially excellent antibacterial agents.