摘要： 采用聚乙烯吡咯烷酮（PVP）辅助溶剂热法，在120℃下合成了溴氧化铋（BiOBr）纳米片组装的微结构。研究表明，合成的BiOBr形状规则，尺寸均匀，并具有良好的结晶性；PVP的加入可使晶体的生长方向得到有效调控，尺寸显著降低。利用合成的BiOBr在紫外光照下降解甲基橙（MO），反应35 min降解率即可达90%以上；循环使用5次后，降解率仍在90%以上，表明BiOBr产品具有良好的光催化活性和稳定性。

关键词: 光催化, BiOBr, 甲基橙

Abstract: Polyvinyl pyrrolidone(PVP) solvothermal method has been used for the synthesis of BiOBr nanoflakes-assembled micro-structure at 120℃. The product is characterized by regular shape, uniform size and good crystallinity. The addition of PVP plays an important role in regulating the growing direction of crystals, and reducing the size of microspheres significantly. Methyl orange can be degraded with the synthesized BiOBr under ultraviolet illumination. The degradation rate can be higher than 90% in 35 min. The product still maintains the degradation rate at 90%, after being used 5 times. It reveals that the prepared BiOBr has good photocatalytic activity and stability.

Key words: photocatalysis, BiOBr, methyl orange(MO)

中图分类号: 

• O611.6

• X703