期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 385, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.121552
关键词
BiOCl@CeO2; Hollow heterostructured microspheres; Synergistic effect; Tetracycline degradation; Visible-light photocatalytic activity
资金
- Major Science and Technology Program for Water Pollution Control and Treatment [2018ZX07109-001]
- Key Research and Development Program of Sichuan Province of China [2018SZ0311, 2019YFS0055]
- Teacher Development Research Startup Fund of Chengdu University of Technology [10912-KYQD-06836]
A high-efficiency hollow BiOCl@CeO2 heterostructured microspheres with type-II staggered-gap type was successfully synthesized by precipitation-hydrothermal process loaded with BiOCl nanoparticles on CeO2 microspheres. XRD, FT-IR, EDS, SEM, HRTEM and XPS results show that the prepared materials have good crystallization, morphology and retain hollow spherical structure of CeO2. Batch experiments indicate that the photocatalytic performance of BiOCl@CeO2 towards Tetracycline (TC) is superior to pure BiOCl or CeO2 owing to the distinctive hollow structures and the formed heterostructure between BiOCl and CeO2. Cyclic experiment exhibits that the optimal BiOCl@CeO2 photocatalyst can still photodegrade more than 80% of TC in 120 min after 4 cycles. Additionally, the reactive oxidation species (ROS) trapping experiments reveal that the critical ROS include photogenerated holes (h(+)) and superoxide radical anions (O-center dot(2-)). Finally, the possible degradation pathways of TC and enhanced photodegradation mechanism was systematically discussed. On this basis, the hollow BiOCl@CeO2 heterostructured microspheres provide a new alternative with great potential in efficient visible-light-driven photodegradation of persistent organic pollutants.
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