Interface electron transfer of Bi2MoO6/MIL-125 and the visible-light performance for pollutant degradation

It is desirable to reveal and in deep understand interface charge transfer behavior that is a crucial process in photochemical reaction. Herein, we mainly investigate the electron transfer behavior on the Bi2MoO6/titanium metal-organic framework (BMO/MIL-125) interface. It is found that on the BMO/MIL-125 hybrid interface, MIL-125 can favor for fluent electron transfer. Compared with BMO, BMO/MIL-125 hybrid has an improved visible-light activity due to an improved charge separation. Moreover, BMO/MIL-125 has a higher BET area (106.5 m2 g-1), compared with BMO (16.6 m2 g-1), which can provide more active sites. The visible-light degradation activity of BMO/MIL-125 is 1.83 and 16.26 times as high as that of BMO and MIL-125, respectively. Dye photosensitization and higher electron transfer and separation efficiency are the two main reasons for the improved degradation performance. This work can help us well understand the interface electron transfer behavior in a photochemical reaction.