MIL-53(Fe) incorporated in the lamellar BiOBr: Promoting the visible-light catalytic capability on the degradation of rhodamine B and carbamazepine

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 374; pp. 975 - 982
• Main Authors: Tang, Liang, Lv, Zhong-qian, Xue, Yuan-cheng, Xu, Ling, Qiu, Wen-hui, Zheng, Chun-miao, Chen, Wen-qian, Wu, Ming-hong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.10.2019
• Subjects: BiOBr; Carbamazepine (CBZ); Degradation pathway; Heterojunction; MIL-53(Fe); MIL-53(Fe); BiOBr; Carbamazepine (CBZ); Degradation pathway; Heterojunction
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2019.06.019

•A coprecipitation method was applied to fabricate BiOBr/MIL-53(Fe) novel photocatalyst.•The MIL-53(Fe) doping endowed BiOBr with the stronger adsorption ability and higher utilization efficiency of visible light.•The heterojunction can be formed between MIL-53(Fe) and BiOBr to enhance the photocatalytic degradation performance.•The degradation pathway of carbamazepine was put forward based on the experimental results. In this work, a series of BiOBr/MIL-53(Fe) hybrid photocatalysts have prepared by a facile co-precipitation method. Rhodamine B (RhB) and carbamazepine (CBZ) were selected as the targets to evaluate the visible-light photocatalytic activity of the prepared samples. All of the hybrids exhibited better catalytic performance compared to the pristine BiOBr, and the performance of BiOBr/MIL-53 (with 20 wt% of MIL-53) was the most efficient. The excellent performance can be contributed to the incorporation of MIL-53(Fe) which not only form the heterojunction with BiOBr to inhibit the recombination of the photoinduced electron-hole pairs, but also utilize the visible light more effectively. The photocatalytic mechanism was studied, it shows that OH and h+ were both the main active species for the degradation of contaminants. Moreover, the degradation pathways of CBZ via the photocatalysis over BiOBr/MIL-53(Fe) hybrid were presented based on the determination of LC–MS/MS and the results of catalytic mechanisms. With the recent increase in reported MOFs materials, we believe a new class of hybrid catalytic materials is possible. This result is conceptually interesting as it opens the door to various MOF-based BiOBr materials for environmental purification and restoration.