Photocatalytic efficient degradation of new carmine by Bi-Sn-MOF(NH2) material and its mechanism

The Bi-Sn-MOF(NH2) material was prepared by the solvothermal method, and the photocatalysts were charac-terized by XRD, FT-IR, SEM, EIS and DRS. The degradation efficiency of Bi-Sn-MOF(NH2) material for new carmine (AR18) reached 99.9% after illumination of 40 min, which was 7.3% and 64.9% higher than that of Bi-MOF(NH2) and Bi-Sn-MOF, respectively. Bi-Sn-MOF(NH2) had good photocatalytic performance because the interaction between amino group and bimetal improves the electron-hole separation efficiency and carrier transport rate. The superoxide radical (.O2-) played a major role in the degradation of AR18. The photocatalytic mechanism of Bi-Sn-MOF(NH2) was proposed based on free radical determination and electrochemical tests.

Automated summary

The Bi-Sn-MOF(NH2) material was prepared using the solvothermal method and characterized using various techniques. The degradation efficiency of Bi-Sn-MOF(NH2) in the presence of new carmine (AR18) reached 99.9%, which was significantly higher than Bi-MOF(NH2) and Bi-Sn-MOF. The improved photocatalytic performance of Bi-Sn-MOF(NH2) can be attributed to the interaction between the amino group and bimetal, leading to enhanced electron-hole separation and carrier transport rate. The superoxide radical (.O2-) played a major role in the degradation process. Based on free radical determination and electrochemical tests, a photocatalytic mechanism for Bi-Sn-MOF(NH2) was proposed.