Enhanced LED-light-driven photocatalytic antibacterial by g-C3N4/BiOI composites

  • Yeping LiEmail author
  • Qian Wang
  • Liying Huang
  • Xiuquan Xu
  • Meng Xie
  • Hao Wang
  • Shuquan Huang
  • Fei Zhang
  • Zhengyun Zhao
  • Juan Yang


g-C3N4/BiOI composites with different ratios were prepared by in-situ generation route at room temperature and applied in antibacterial investigation. Detailed information of the composites was characterized by XRD, TEM, HRTEM, SEM, EDS, BET, XPS, FT–IR, UV–Vis, photocurrent and EIS. The obtained g-C3N4/BiOI composites presented excellent antibacterial performance toward Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) under LED track light, with the complete inactivation of bacterial within 30 min. The decomposition of bacterial cells was observed by SEM. The bacterial mechanism was investigated by trapping experiments: holes (h+), superoxide anion free radical (O2) and hydrogen peroxide (H2O2) were identified as active species for bacterial inactivation, and h+ had a main effect in the antibacterial process. The enhanced photocatalytic activities were assigned to an efficient separation and transition of electrons (e) and h+ in photocatalytic antibacterial process. This work indicated the g-C3N4/BiOI composites are promising photocatalytic antibacterial materials for water disinfection.



National Nature Science Foundation of China (Grant Nos. 21406094, 21506079 and 51572114), Postdoctoral Foundation of China (Grant No. 2015M571693) and Foundation of Jiangsu University (Grant No. 14JDG184) were genuinely appreciated.


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Authors and Affiliations

  1. 1.School of PharmacyJiangsu UniversityZhenjiangPeople’s Republic of China
  2. 2.School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiangPeople’s Republic of China
  3. 3.School of Material Science and EngineeringJiangsu UniversityZhenjiangPeople’s Republic of China

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