Affiliation:
1. State Key Laboratory of Featured Metal Materials and Life‐Cycle Safety for Composite Structures School of Resources, Environment and Materials Guangxi University Nanning 530004 P. R. China
2. School of Nuclear Science and Technology University of South China Hengyang 421001 P. R. China
3. State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants Shanghai Academy of Environmental Sciences Shanghai 200233 P. R. China
Abstract
AbstractThe construction of heterojunction photocatalysts is an auspicious approach for enhancing the photocatalytic performance of wastewater treatment. Here, a novel CeO2/Bi2WO6 heterojunction is synthesized using an in situ liquid‐phase method. The optimal 15% CeO2/Bi2WO6 (CBW‐15) is found to have the highest photocatalytic activity, achieving a degradation efficiency of 99.21% for tetracycline (TC), 98.43% for Rhodamine B (RhB), and 94.03% for methylene blue (MB). The TC removal rate remained at 95.38% even after five cycles. Through active species capture experiments, •O2−, h+, and •OH are the main active substances for TC, RhB, and MB, respectively. The possible degradation pathways for TC are analyzed using liquid chromatography‐mass spectrometry (LC‐MS). The photoinduced charge transfer and possible degradation mechanisms are proposed through experimentation and density functional theory (DFT) calculations. Toxicity assessment experiments show a significant reduction in toxicity during the TC degradation process. This study uncovers the mechanism of photocatalytic degradation in CeO2/Bi2WO6 and provides new insights into toxicity assessment.
Funder
National Natural Science Foundation of China
National Basic Research Program of China
Natural Science Foundation of Guangxi Province
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
7 articles.
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