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Photocatalytic degradation of antibiotic sulfamethizole by visible light activated perovskite LaZnO3

JOURNAL OF ENVIRONMENTAL SCIENCES 2024年第10期144卷 212-224页

作者： Huy, Bui The Nguyen, X. Cuong Bui, Vu Khac Hoang Tri, Nguyen Ngoc Rabani, Igra Tran, Nhu Hoa Thi Ly, Quang Viet Truong, Hai Bang Pukyong natl univ Coll Informat Technol & Convergence Div Smart Healthcare Biomed Engn Busan 48513 South Korea Duy Tan univ Inst Res & Dev Ctr Adv Chem Da Nang 550000 Vietnam Duy Tan univ Fac Environm & Chem Engn Da Nang 550000 Vietnam Sejong univ Dept Environm & Energy Seoul 05006 South Korea Quy Nhon univ Fac Nat Sci Dept Chem Lab Computat Chem & Modelling Qui Nhon Vietnam Sejong univ Dept Nanotechnol & Adv Mat Engn Seoul 05006 South Korea univ Sci Fac Mat Sci & Technol Ho Chi Minh City 700000 Vietnam vietnam natl univ Ho Chi Minh City 700000 Vietnam Seoul natl univ Sci & Technol Dept Environm Engn Seoul 01811 South Korea Van Lang univ Sci & Technol Adv Inst Opt Mat Res Grp Ho Chi Minh City Vietnam Van Lang univ Fac Appl Technol Sch Technol Ho Chi Minh City Vietnam

In this work, the perovskite LaZnO3 was synthesized via sol-gel method and applied for photocatalytic treatment of sulfamethizole (SMZ) antibiotics under visible light activation. SMZ was almost completely degraded (99.2% + 0.3%) within 4 hr by photocatalyst LaZnO3 at the optimal dosage of 1.1 g/L, with a mineralization proportion of 58.7% + 0.4%. The efficient performance of LaZnO3 can be attributed to its wide-range light absorption and the appropriate energy band edge levels, which facilitate the formation of active agents such as center dot O2 -, h+ , and center dot OH. The integration of RP-HPLC/Q-TOF-MS and DFT-based computational techniques revealed three degradation pathways of SMZ, which were initiated by the deamination reaction at the anilin ring, the breakdown of the sulfonamide moieties, and a process known as Smile-type rearrangement and SO2 intrusion. Corresponding toxicity of SMZ and the intermediates were analyzed by quantitative structure activity relationship (QSAR), indicating the effectiveness of LaZnO3-based photocatalysis in preventing secondary pollution of the intermediates to the ecosystem during the degradation process. The visible -light -activated photocatalyst LaZnO3 exhibited efficient performance in the occurrence of inorganic anions and maintained high durability across multiple recycling tests, making it a promising candidate for practical antibiotic treatment. (c) 2024 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

关键词： Perovskite Antibiotics Photocatalysis Density functional theory Toxicity INORGANIC-IONS SULFAMETHOXAZOLE SUPEROXIDE

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