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Ag-loaded BiFeO3/CuS heterostructured based composite: an efficient photocatalyst for removal of antibiotics and antibacterial activities

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Abstract

The performance of advanced materials in environmental applications using green energy is the tremendous interest among researchers. The visible light responsive BiFeO3 (BFO), BiFeO3/CuS (BFOC), and Ag-loaded BiFeO3/CuS (Ag-BFOC) heterostructures have been synthesized by reflux method followed by hydrothermal and wetness impregnation method. These synthesized composites are well characterized through X-ray diffraction, UV diffuse reflectance spectroscopy, scanning electron microscope, and Fourier transfer infrared spectroscopy techniques. Compared with BFO and BFOC, Ag-BFOC exhibits the highest photocatalytic performance towards the degradation of antibiotics ciprofloxacin (76%) within 120-min time and also showed better antibacterial performance towards gram-negative (Escherichia coli, Klebsiella pneumoniae, and Acinetobacter baumannii) bacteria. Moreover, the novelty of the present work is the addition of CuS on the surface of BiFeO3 from heterojunction type II and facilitates the electron–hole channelization at the interfaces between BiFeO3 and CuS. Again, the loading of Ag on BiFeO3/CuS helps in shifting the absorption band towards the red end, is eligible to absorb more sunlight due to surface plasmon resonance effect, improves the separation efficiency of photo-generated charge carriers, and enhances the photocatalytic degradation of ciprofloxacin. The antibacterial property of Ag gives a best result towards antimicrobial activity. The prepared composites have proved their durability and stability by four successive cycles and prove the versatility of the composite.

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Schematic representation of removal of antibiotics and antibacterial activities using Ag-loaded BiFeO3/CuS heterostructured based composite

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Acknowledgements

The authors are thankful to Siksha O Anusandhan (Deemed to be University) for their support to carry out the research work.

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All authors contributed to the study and design. Material preparation, data collection, and analysis were performed by LP. The first draft of the manuscript was written by LP and BN. Review and editing of the manuscript were performed by AP, ES, and RKS. All authors read and approved the final manuscript.

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Correspondence to Binita Nanda.

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Panda, L., Pradhan, A., Subudhi, E. et al. Ag-loaded BiFeO3/CuS heterostructured based composite: an efficient photocatalyst for removal of antibiotics and antibacterial activities. Environ Sci Pollut Res 31, 5540–5554 (2024). https://doi.org/10.1007/s11356-023-31523-3

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  • DOI: https://doi.org/10.1007/s11356-023-31523-3

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