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Preparation of PEO-based Cu2O/Bi2O2CO3 electrospun fibrous membrane toward enhanced photocatalytic degradation of chloramphenicol

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Abstract

Novel p–n heterojunction of Cu2O/Bi2O2CO3 photocatalysts with various proportion of Cu2O are synthesized by the precipitation method at room temperature, which are then combined with electrospinning method and electron beam irradiation to construct a photocatalyst-polymer structure. The results indicated that the Cu2O/Bi2O2CO3 photocatalyst obtained, in contrast to the pure Bi2O2CO3, enabled improved visible-light absorption, which can separate and migrate the charge carriers efficiently via solid p–n heterojunction interfacial effect. Accordingly, the Cu2O/Bi2O2CO3/PEO nanofibers allowed for the higher visible-light-responsive photocatalytic activity for the degradation of chloramphenicol (CAP), which the highest degradation efficiency is 98.2% for CAP in 30 min and obviously higher than that of Bi2O2CO3 membrane. In addition, combining cytotoxicity experiments with LC-IT-QTOF, it is found that intermediates such as DH-CAP and NO-CAP produced during the degradation of CAP are main possible reasons for the increase in the solution cytotoxicity. Besides, the obtained materials show significant inhibition against Escherichia coli and Staphylococcus aureus with the maximum inhibition rates of 81.5% and 75.6%, respectively.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 11775138, 12075146, 11675098 and 41473089), Innovation Program of Shanghai Municipal Education Commission (No. 13YZ017) and Program for Changjiang Scholars and Innovative Research Team in University (No. IRT13078).

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  1. Qinqing Wang, Shuting Ji and Qin Xu have contributed equally to this work.

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  1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People’s Republic of China

    Qinqing Wang, Shuting Ji, Qin Xu & Wenyan Shi

  2. Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, 200233, People’s Republic of China

    Longxiang Shen

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  1. Qinqing Wang
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Wang, Q., Ji, S., Xu, Q. et al. Preparation of PEO-based Cu2O/Bi2O2CO3 electrospun fibrous membrane toward enhanced photocatalytic degradation of chloramphenicol. J Mater Sci 56, 4599–4614 (2021). https://doi.org/10.1007/s10853-020-05564-9

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