Abstract
The problem of antibiotic contamination has received increasing attention, and photocatalytic degradation is considered to be an effective solution. In this paper, a series of La, Cr co-doped SrTiO3 nanoparticles (La0.0xSr1−0.0xTi1−0.0xCr0.0xO3, denoted as STO-x) were synthesized using a simple citric-combustion method. X-ray diffraction pattern shows that all samples form a cubic perovskite structure, with a shift in the characteristic peak for the doped samples. The UV–Vis diffuse reflectance spectroscopy studies reveal that all Cr-doped samples have strong absorption of visible light. STO-1 has the largest specific surface area of 22.49 m2/g and the lowest photoluminescence intensity. More attractively, according to the X-ray photoelectron spectroscopy, the largest Cr3+/Cr6+ molar ratio is found in the STO-1 sample. The photocatalytic investigation demonstrates the significant photocatalytic activity of the doped samples for the degradation of tetracycline and ciprofloxacin under visible light, with STO-1 showing the best performance. Further, the mechanism of enhanced photocatalytic activity of La, Cr co-doped SrTiO3 samples is studied by trapping experiments. Therefore, this work shows that La, Cr ion co-doping is an effective method to improve the visible photocatalytic performance of SrTiO3.
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The datasets generated during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
This work was supported by the National Key Research and Development Program of China (No. 2022YFC3700326).
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The research leading to these results received funding from the National Key Research and Development Program of China under Grant Agreement No. 2022YFC3700326.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by KD. The first draft of the manuscript was written by KD and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Deng, K., Fan, H., He, Z. et al. La and Cr co-doped SrTiO3 prepared by citric-combustion method for photocatalytic degradation of antibiotics under visible-light. J Mater Sci: Mater Electron 34, 1653 (2023). https://doi.org/10.1007/s10854-023-11026-0
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DOI: https://doi.org/10.1007/s10854-023-11026-0