A novel Bi₂Sn₂O₇@MIL-100(Fe) composite photocatalyst was fabricated by loading Bi₂Sn₂O₇ nanoparticles on the surface of mesoporous MIL-100(Fe). The structure-property relationships of such composite photocatalyst were studied. The results exhibit that the formed Bi₂Sn₂O₇@MIL-100(Fe) heterojunction promote the separation of photo-generated carriers, leading to the enrichment of photo-generated electrons on MIL-100(Fe). Meanwhile, MIL-100(Fe) can provide more active sites for photocatalytic reaction due to its extraordinary specific surface area. Therefore, the Bi₂Sn₂O₇@MIL-100(Fe) composite photocatalyst exhibits excellent superoxide-radical-dominated photocatalytic activity and is more propitious to degrading the contaminants such as ciprofloxacin, which can be efficiently degraded in the absence of superoxide radicals. The Bi₂Sn₂O₇@MIL-100(Fe) composite reveals enhanced photocatalytic activity for degrading ciprofloxacin with rate constant (0.0143 min⁻¹) 1.96 and 3.86 times higher than that of pure MIL-100(Fe) (0.0073 min⁻¹) and pure Bi₂Sn₂O₇ (0.0037 min⁻¹), respectively.

通过在介孔MIL-100(Fe)表面负载Bi ₂ Sn ₂ O ₇纳米粒子制备了一种新型Bi ₂ Sn ₂ O ₇ @MIL-100(Fe)复合光催化剂。研究了这种复合光催化剂的结构-性能关系。结果表明，形成的Bi ₂ Sn ₂ O ₇ @MIL-100(Fe)异质结促进了光生载流子的分离，导致MIL-100(Fe)上的光生电子富集。同时，MIL-100(Fe)由于其非凡的比表面积可以为光催化反应提供更多的活性位点。因此，Bi ₂ Sn ₂O ₇ @MIL-100(Fe)复合光催化剂表现出优异的以超氧自由基为主的光催化活性，更有利于降解环丙沙星等污染物，在无超氧自由基的情况下也能有效降解。Bi ₂ Sn ₂ O ₇ @MIL-100(Fe) 复合材料显示出增强的光催化降解环丙沙星的活性，速率常数 (0.0143 min ^-1 ) 比纯 MIL-100(Fe) (0.0073 min ^{- ) 高 1.96 倍和 3.86 倍1} )和纯Bi ₂ Sn ₂ O ₇ (0.0037 min ^-1 )。