查找使用阿拉丁产品的科研文献

One-pot synthesis of interfacially bonded Bi4O5Br2/Bi2S3 Z-scheme heterostructures with boosted photocatalysis towards dodecylbenzenesulfonate and real hotel laundry wastewater

Wenqian Lian,Lei Wang,Lin Xu,Xiaofei Fu,Zuming He,Junwu Tao,Yongmei Xia,Huimin Li,Xinyue Xu

The ubiquitous contamination of surfactants in wastewater has raised global concerns. Photocatalysis is deemed as a promising yet challenging approach for the decomposition of surfactant residues. Herein, a novel Z-scheme heterojunction of Bi 4 O 5 Br 2 /Bi 2 S 3 with covalent S–O bonds was prepared via a facile one-pot hydrothermal and subsequent annealing process. The prepared optimal Bi 4 O 5 Br 2 /Bi 2 S 3 composite exhibited remarkable photo-degradation activity towards the sodium dodecylbenzene sulfonate (SDBS). The Z-scheme reaction mechanism was proposed and validated by meticulous analysis of quenching tests, ESR spectroscopy and DFT calculations. Furthermore, the presence of chemical S–O linkages between Bi 4 O 5 Br 2 and Bi 2 S 3 was identified via FT-IR and XPS analyses, which served as a distinct bridge to modify the Z-scheme route for carrier transport. The Z-scheme heterostructure, in conjunction with chemical S–O bonds, synergistically enhanced the separation rate of electron-hole pairs and thus greatly boosted the photocatalytic activity. Additionally, the possible degradation pathways of SDBS were proposed by using HR-MS technology. Moreover, real hotel laundry wastewater could be efficiently disposed by the photocatalysis of the Bi 4 O 5 Br 2 /Bi 2 S 3 with a decrease in the COD value from 428 to 74 mg/L, indicating that the fabricated Z-scheme heterojunction hold great promise for effectively removing refractory surfactant contaminants from aquatic environment.