abstract
The elaborate design of efficient strategy to facilitate interfacial and spatial charge separation is a prospective strategy for the enhancement of photodegradation activity. Herein, the oxygen vacancies modified hierarchical hollow tubular Bi2WO6/In2O3 heterostructure was synthesized via an in situ self -assembly method using MIL -68 (In) as precursors and structural component, which can modulate charge redistribution for effective photocatalytic norfloxacin degradation (90.8%) in 50 min. The XRD, ESR, HRTEM, and XPS characterizations significantly prove the existence of oxygen vacancies and the successful construction of Bi2WO6/In2O3 heterojunction. Furthermore, the optimal BWO/In2O3-25 catalyst exhibits excellent degradation efficiency of NOR in practical water matrices and superior decomposition performances of tetracycline (82.1%), ciprofloxacin (82.4%), levofloxacin (88.2%), methyl orange (86.3%), methylene blue (93.2%), and rhodamine B (94.7%). Importantly, the toxicity of NOR can be ignored after the degradation. Capture experiments and DFT calculations collaboratively demonstrate the Z -scheme charge migration mechanism. This study presents a novel opinion for rational developing oxygen vacancies modified Z -scheme heterojunction with unique spatial and interfacial charge flow steering via a facile strategy.
keywords
LIGHT-DRIVEN PHOTOCATALYST; EFFICIENT; MECHANISM; REMOVAL
subject category
Engineering
authors
Wang, X; Guo, CY; Hu, XR; Xu, YF; Zhang, C; Wei, JM; Weng, JS; Liu, YL; Fu, LS; Wang, Q; Yang, TH
our authors
Lianshe Fu
Junior Researcher
Tinghai Yang
Post-doc FellowshipProjects
Nano-argilas para remoção/captura de fosfatos (P) e sua reutilização como fertilizante (NATURAL)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 51972173) , the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (23KJA430007) and the College Students Training Program of Innovation and Entrepreneurship of Jiangsu Province (KYX23013) . This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/ 2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC) . We also thank the Analytical and Testing Center at Jiangsu University of Technology for measuring PXRD. The authors would like to thank Mengyan Chen from Shiyanjia Lab ( www.shiyanjia.com ) for the BET analysis.