BiFeO3的水热合成、表征及光催化性能研究

摘要

以Bi(NO3)3·5H2O和Fe(NO3)3·9H2O为原料,KOH为矿化剂,聚乙二醇6000为分散剂,水热合成了单相BiFeO3粉体,利用X射线衍射、扫描电镜优化了水热合成条件,利用振动样品磁强计测定了BiFeO的磁滞回线,并对产物进行了光催化降解甲基橙性能的研究.结果表明,200℃奈件下反应6h制备的BiFeO粉体显顺磁性,紫外光照射4h对甲基橙的降解率可达90％.%Single phase of BiFeQ3 powder has been synthesized by the hydrothermal method, using Bi(NO3)3 · 5H2O and Fe(NO3)3 · 9H2O as raw materials, KOH as mineralizer, polyethylene glycol 6000 as dispersant The hy-drothermal synthesis conditions were optimized by X-ray powder diffraction and scanning electron microscope. The magnetic hysteresis loop of BiFeO3 was measured by vibrating-sample magnetometer. Experiment results show that BiFeQj powders prepared at 200℃ for 6h are paramagnetic with high photocatalytic properties, and the degradation ef-ficiency of methyl orange is near 90% under UV light irradiation for 4h.