氧化铋/石墨烯复合物的室温固相制备与光催化性能

Preparation of Bismuth Oxide/Graphene Composite by Room-temperature Solid Reaction and Their Photocatalytic Activity

采用室温固相法成功制备得到纳米Bi2O3和Bi2O3/石墨烯纳米复合物,利用拉曼光谱仪等表征手段对所得产物进行表征。研究结果表明,纳米Bi2O3为球状颗粒,尺寸为100~300nm,颗粒团聚,Bi2O3/石墨烯复合物的形貌尺寸约为100nm,球状颗粒负载于层状的石墨烯上。研究了所得产物对水溶液中甲基橙的光催化降解性能。结果发现Bi2O3与石墨烯复合后,光催化性能有一定提升。在紫外光照射下,Bi2O3/石墨烯在60min即可实现对污染物的完全降解。

Nano-Bi2O3 and Bi2O3/graphene nanocomposites were prepared by solid-state method in room temperature.The obtained products were characterized by methods including Raman spectrometer.The results showed that the Bi2O3 nanoparticles were spherical particles with a size of 100~300 nm and the particles were agglomerated together.The morphology of the Bi2O3/graphene composite were the particles with size of 100 nm supported by laminated graphene.The photocatalytic degradation of methyl orange in aqueous solution was also studied.The results showed that the photocatalytic activity of Bi2O3/graphene composite is greatly improved after the combination of Bi2O3 and graphene.Under UV irradiation,the pollutants can be degraded completely by Bi2O3/graphene in 60 min,which is better than that of pure Bi2O3 nanoparticles.