中文摘要：

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BiFeO3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℃条件下反应6h制备的BiFeO3粉体显顺磁性，紫外光照射4h对甲基橙的降解率可达90％。

英文摘要：

Single phase of BiFeO3 powder has been synthesized by the hydrothermal method, using Bi（NO3 ）3 · 5H2O and Fe（NOs ）3 · 9H2O as raw materials, KOH as mineralizer, polyethylene glycol 6000 as dispersant. The hydrothermal 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 BiFeO3 powders prepared at 200℃ for 6h are paramagnetic with high photocatalytic properties, and the degradation efficiency of methyl orange is near 90% under UV light irradiation for 4h.