#TITLE_ALTERNATIVE#

• Main Author: CIAYADI (NIM : 13707062); Pembimbing : Dr. Ir. Bambang Sunendar, RIKY
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/17013
• Institution: Institut Teknologi Bandung

Fe3O4 is a solid which is synthesized from an iron-based compound using the co-precipitation method of a mixture of ferrous sulphate heptahydrate solution (FeSO4.7H2O) and Ferric chloride hexahydrate (FeCl3.6H2O) with a ratio of mole ratio 1: 2 is heated at 70°C for 30 minute in a closed system. Parameter used in the synthesis of Fe3O4 is the concentration of Ferrous sulphate heptahydrate(FeSO4.7H2O) and Ferric chloride hexahydrate (FeCl3.6H2O) and sodium alginate. To determine the phase, microstructure of the surface, the shape of nano particles, functional group and magnetic properties to use X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectrometer (FTIR) and a vibrating sample magnetometer (VSM). The test results obtained on single-phase Fe3O4 and the characteristic peak with the index corresponding JCPDS File No. reference. 19-629, ie (2 2 0), (3 1 1), (4 0 0), (4 2 2), (5 1 1) and (4 4 0) at 2&#952; = 30,2o, 35,5o, 43,1o, 53,4o, 57o and 62,6o. Then in the characterization by SEM the morphology of the particles Fe3O4 visible round and dispersed at an average diameter <br /> <br /> <br /> <br /> <br /> of particles without alginate is 46 nm and with alginate is 40 nm. In the FTIR characterization of the OH group with a visible wavelength 3386,39 cm-1 from alginate and Fe-O clusters with wavelengths 563,112 cm-1, this showed the interaction among alginate-FeOH itself from precursor as Fe-O-Fe polimerization. VSM characterization we get a hysteria curve which indicates the magnetic properties of <br /> <br /> <br /> <br /> <br /> Fe3O4 is superparamagnetic with the magnetic moment 67,29 emu/gram and magnetic properties on the addition of alginate has smaller magnetic moment of the range (60,7 <br /> <br /> <br /> <br /> <br /> to 42,48 emu/gram), until the addition of 0,2% sodium alginate so the magnetic moment is 57,31 emu/gram.