Preparation and Characterization of α-Fe2O3 from Iron Mud by Hydrothermal Synthesis

摘要

As a solid waste,the synthesis of α-Fe2O3 from iron sludge remains a challenge.In this experiment,α-Fe2O3 nanocrystals were successfully synthesized by hydrothermal method using iron sludge as iron source,and the effects of reaction time and pH on the experimental results were studied.The synthesized products were characterized by X-ray diffraction,SEM,FT-IR and VSM analysis.The results show that the optimum synthesis time and pH are 6 h and 6 respectively.Under these conditions,the size of nanocrystalline α-Fe2O3 is about 80 nm.According to the hysteresis loop,the powder synthesized is a weak magnetic material,which has broad application prospects in high frequency electromagnetic materials.