Study of Nanomagnetite Formation by Green Synthesis Method of Pineapple Leaf Extract Varying FeCl₃.6H₂O Concentration

The FeCl 3 .6H 2 O synthesis process into Fe 3 O 4 uses the Green Synthesis method by adding NaOH from FeCl 3 .6H 2 O solution to pineapple leaf extract (Ananas Comosus). Pineapple leaf extract obtains hydroxyl and carbonyl, which serve as production agents for the synthesized FeCl 3 .6H 2 O. Extraction is done using the boil method to extract pineapple leaves. The concentration of FeCl 3 .6H 2 O in the synthesis is a factor in forming Fe 3 O 4 . In the manufacture of Fe 3 O 4 nanoparticles, variations in FeCl 3 .6H 2 O concentration were given, namely 0.1 M, 0.5 M, and 1 M. From the results of Fourier Transfrom Infrared Spectroscopy (FTIR) testing on pineapple leaves; it was proven that carbonyl and hydroxyl groups were present. For the results of X-Ray Diffraction (XRD) testing, it is proven that the formation of Fe 3 O 4 . For Scanning Electron Microscope-Energy Dispersive X-ray (SEM-EDX) testing, the optimum variation is 0.5 M because it has an average particle size of 220.31 nm with an irregular particle shape. Then in Surface Area Analyzer (SAA) testing, the surface area is 28.782 m 2 /g. The highest percent degradation results of each variation that contacted with methylene blue (MB) is a concentration of 0.1 M with a contact time of 60 minutes base on Ultraviolet–visible spectroscopy (Uv-Vis) data.