ANALISA LOOP HYSTERESIS DAN MORFOLOGI NANOPARTIKEL OKSIDA BESI PASIR ALAM LOGAS DIDOPING COBALT DAN APLIKASINYA UNTUK DEGRADASI METILEN BIRU

Abstract

Methylene blue, a synthetic dye is widely used in the textile industry. Methylene blue has a negative impact on the environment, for example contaminated water, so it is necessary to overcome this problem, using degradation method. This research has been carried out on the application of iron oxide nanoparticles for the degradation of methylene blue. Iron oxide nanoparticles are obtained from Logas natural sand Kuantan Singingi Regency, Riau Province through a Ball Milling process. Determination of the magnetic and morphological properties of the sample is determined using a Vibrating Sample Magnetometer (VSM) and Scanning Electron Microscope (SEM). The results of research using VSM showed that the values of saturation magnetization (Ms), remanent magnetization (Mr) and coercivity (Hc) increased with the addition of Cobalt concentration. The saturation Magnetization value (Ms) is 7.98 emu/g; 17.42 emu/g; and 19.01 emu/g, Remanent magnetization (Mr) 0.65 emu/g; 1.52 emu/g; and 1.64 emu/g, Coercivity (Hc) 124.21 Oe; 255.5 Oe; and 269.29 Oe. The results of SEM data of iron oxide nanoparticles magnification of 10,000 times showed a decrease in the average particle size as the concentration of Cobalt doping increased, namely 0.812 μm; 0.637μm; and 0.631 μm. The ability of Iron Oxide nanoparticles as a catalyst in UV-Vis spectroscopy and showed a poor ability to degrade methylene blue in aqueous solution when Iron Oxide nanoparticles are doped with Cobalt. The best efficiency is when hematite is doped with Cobalt 0 wt.%, 5 wt.% and 10 wt.% in the first 20 minutes are 81.62%, 70.909% and 82.856% respectively.