THE EFFECT OF LAURIC ACID MASS VARIATIONS ON THE SIZE OF MAGNETITE NANOPARTICLES (FE3O4) FROM IRON SANDS AT SUNUR PARIAMAN BEACH ESTUARY

Abstract

The purpose of this research to investigate effect of lauric acid mass on crystal size in magnetite samples using iron sand as the basis of Sunur Pariaman beach. Synthesis of magnetite nanoparticles using using iron sand from Sunur Pariaman beach. Synthesis of magnetite nanoparticles using HCl 12 M has a solvent and NH₄OH as a precipitate. The method used is the coprecipitation method with of lauric acid as a surfactant. Lauric acid serves to prevent agglomeration. Synthesis of magnetite nanoparticles characterized using XRD. The crystal size is calculated using the Scherrer- Debye equation. The result showed that lauric acid variations gave the same crystal structure namely cubic but different crystal size. Magnetite with the addition of lauric acid 0 grams, 1.25 grams, 2.5 grams, 3.75 grams and 5 grams obtaines crystal size of 23.2 nm, 28.1 nm, 25.3 nm, 20.9 nm and 23.1 nm.