|Cite this article as:|
|Nasrin Sedaghati, Aziz Habibi-Yangjeh, and Alireza Khataee, Fabrication of g-C3N4 nanosheet/Bi5O7Br/NH2-MIL-88B (Fe) nanocomposites: Double S-scheme photocatalysts with impressive performance for removal of antibiotics upon visible light, Int. J. Miner. Metall. Mater.,(2023). https://doi.org/10.1007/s12613-023-2618-5|
Novel g-C3N4 nanosheet/Bi5O7Br/NH2-MIL-88B(Fe) photocatalysts (denoted as GCN-NSh/Bi5O7Br/Fe-MOF) with a double S-scheme heterojunctions were synthesized by a facile solvothermal route. The resultant materials were examined by XPS, XRD, SEM, TEM, HRTEM, PL, EDX, FT-IR, UV-vis DRS, photocurrent density, EIS, and BET analyses. After integration of Fe-MOF with GCN-NSh/Bi5O7Br, the removal constant of tetracycline over the optimal GCN-NSh/Bi5O7Br/Fe-MOF (15%) nanocomposite was promoted 33-times in comparison with the pristine GCN. Furthermore, compared to the pure GCN, the GCN-NSh/Bi5O7Br/Fe-MOF (15%) nanocomposite showed supreme photoactivity to azithromycin, metronidazole, and cephalexin removal, which were 36.4, 20.2, and 14.6 times as high as the GCN, respectively. The radical quenching tests showed that ⦁O⁻2 and h⁺ mainly contributed in the elimination reaction. In addition, the nanocomposite had excellent activity after four successive cycles. According to the developed n-n heterojunctions amongst n-GCN-NSh, n-Bi5O7Br, and n-Fe-MOF semiconductors, a double S-scheme charge transfer mechanism was proposed for destruction of the selected antibiotics.