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In situ generation of hydroxyl radicals by B-doped TiO2 for efficient photocatalytic degradation of acetaminophen in wastewater

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Abstract

Acetaminophen (AP) is a widely used antipyretic analgesic belonging to the class of PPCPs, which is difficult to be effectively degraded by traditional water treatment processes. However, photocatalytic technology may be an effective approach. Herein, B-doped TiO2 photocatalytic materials were synthesized by sol–gel method, calcinated at 600℃ for 2 h, investigated by XRD, TEM, XPS, and other characterization methods. The photocatalytic efficiency and factors affecting the photocatalytic activity were assessed by degradation of AP under 365 nm UV light. Compared with undoped TiO2, 4%B-TiO2 nanopowder has smaller grain size, higher porosity, and lower bandgap energy of 3.11 eV. Scavenging experiments and ESR results show that •OH is the principal active species. Hence, the degradation efficiency of AP is as high as 98.8% in 30 min when adopting 10-mg/L AP initial concentration and 1-g/L 4%B-TiO2 loading, owing to efficient •OH generated by B-TiO2.

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Funding

This work is supported by the National Natural Science Foundation of China (51672196). This article is also supported by the Graduate Innovation and Entrepreneurship Fund Project of Wuhan University of Science and Technology (JCX2021016).

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Caofan Xiao conceived, designed the experiments, and wrote the manuscript. Xueqi Chen and Xiumei Tao provided suggestions for the study. Xian Liu supervised the progress of experiments, provided suggestions, and reviewed papers. Xun Wang provided suggestions and financial support. Lei Zhu reviewed the first draft. All authors discussed the results and contributed to the final manuscript.

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Correspondence to Lei Zhu.

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Xiao, C., Chen, X., Tao, X. et al. In situ generation of hydroxyl radicals by B-doped TiO2 for efficient photocatalytic degradation of acetaminophen in wastewater. Environ Sci Pollut Res 30, 46997–47011 (2023). https://doi.org/10.1007/s11356-023-25390-1

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