Effects of Different Ligands Value on the Synthesis of FePO₄ Precursor

Abstract

This FePO4 precursor was synthesized from Fe (NO3)3·9H2O, NH4H2PO4 ,different ligands by liquid precipitation route. Effects of different ligands value on the synthesis of FePO4 precursor were studied. The phrase, structure and morphology of FePO4 were characterized by XRD and SEM . The results showed that the structure and morphology of composite materials are dependence on synthesis process and complexant. After being added with different ligands, FePO4 precursor’s morphologies have significant differences. Iron phosphate can produce the pure phase after calcinations. Keep it under 85°C for three hours after adding the citric acid and ammonium oxalate by liquid phase precipitation.When the concentration is 1.0 mol/L, PH = 1.5 ,we get flaky microspheres which are about 8 um. After being calcinated under 700°C for 2 hours, we get pure iron phosphate finally. The properties of micro ball with high specific surface area and tap density make FePO4 precursor has important applications in many ways.