期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 300, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2022.121891
关键词
Mechanochemistry; Catalysis; Catalytic degradation; Singlet oxygen; Perovskite
资金
- Natural Science Foundation of Guangdong Province [2019A1515011659]
- Guangdong Laboratory for Lingnan Modern Agriculture Project [NT2021010]
- National Natural Science Foundation of China [51509093]
Direct heterogeneous catalysis is used to decontaminate antibiotic polluted water for the first time. Perovskite-structured composites LaxSr(1-x)CoO3-delta (LSC) are synthesized using a green mechanical milling method and effectively catalyze the degradation of doxycycline (DC) without the need for chemical re-agents or illumination. The study provides a facile synthesis route for catalyst preparation and promotes the development of a green method for wastewater treatment.
Direct heterogeneous catalysis is conducted to decontaminate antibiotic polluted water for the first time. Perovskite-structured composites LaxSr(1-x)CoO3-delta (LSC) are synthesized by a green mechanical milling method (as it involves no organic solvent, generates no wastewater, and is viable for industrial-scale use) and applied for the efficient catalytic degradation of doxycycline (DC) via singlet oxygen without the addition of chemical re-agents or illumination. The oxygen vacancy produced during ball milling stores numerous electrons. These electrons and singlet oxygen exert a synergistic effect on the catalytic reaction, thereby improving the catalytic degradation of DC. LSC can effectively catalyze the degradation of DC in the dark. The total organic carbon removal efficiency reaches 89.64%, indicating that most DC is eventually mineralized to CO2 and H2O. The catalytic degradation of DC follows two principal degradation pathways involving 13 intermediates. Toxicity prediction indicates that the toxicity of the products initially increases and then decreases with the degradation process and that the final products are not toxic. This study not only allows a facile synthesis route for catalyst preparation but also promotes the development of a green method for wastewater treatment.
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