Stable photodegradation of antibiotics by the functionalized 3D-Bi 2 MoO 6 @MoO 3 /PU composite sponge: High efficiency pathways, optical properties and Z-scheme heterojunction mechanism

• Published in: Chemosphere (Oxford) Vol. 332; p. 138911
• Main Authors: Liu, Yu, Xia, Xinhui, Gao, Zhelu, Zhao, Qingliang, Ding, Jing, Cheng, Xiuwen, Wei, Liangliang
• Format: Journal Article
• Language: English
• Published: England 01.08.2023
• Subjects: Anti-Bacterial Agents; Environmental Pollutants; Oxytetracycline; Photolysis; Photocatalytic; BiMoO@MoO/PU sponge; Z-scheme heterojunction; Emerging pollutants; OTC
• ISSN: 1879-1298

The designation and fabrication of heterogeneous photocatalyst with superior redox capability is an important technique for emerging pollutants treatment. In this study, we designed the Z-scheme heterojunction of stable 3D-Bi MoO @MoO /PU, which could not only accelerate the migration and separation in photogenerated carriers, but also stabilize the separation rate of photo-generation carriers. In the Bi MoO @MoO /PU photocatalytic system, 88.89% of oxytetracycline (OTC, 10 mg L ) and 78.25%-84.59% of multiple antibiotics (SDZ, NOR, AMX and CFX, 10 mg L ) could be decomposed within 20 min under the optimized reaction condition, revealing the superior performance and potential application value. Specifically, the morphology, chemical structure and optical properties detection of Bi MoO @MoO /PU greatly affected the direct Z-scheme electron transferring mode in the p-n type heterojunction. Besides, the ·OH, h , ·O dominated the photoactivation process through ring-opening, dihydroxylation, deamination, decarbonization and demethylation in OTC decomposition. Expectantly, the stability and universality of Bi MoO @MoO /PU composite photocatalyst would further broaden the practical application and demonstrated that the potential of photocatalytic technique in antibiotics pollutants for wastewater remediation.