J. Mater. Sci. Technol. ›› 2025, Vol. 209: 149-160.DOI: 10.1016/j.jmst.2024.05.018

• Research Article • Previous Articles     Next Articles

Defect regulation of p-n scheme Cu2NxO1-x/PDINH composites for enhanced photocatalytic antibacterial activities

Chengcheng Maa, Shougang Chena,b,*, Chaoqun Wanga, Zhipeng Zhaoa, Wei Wanga,b, Wen Lia,b   

  1. aSchool of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China;
    bQingdao Key Laboratory of Marine Extreme Environmental Materials, Qingdao 266100, China
  • Received:2024-03-20 Revised:2024-04-23 Accepted:2024-05-02 Published:2025-02-20 Online:2024-05-27
  • Contact: *E-mail address: sgchen@ouc.edu.cn (S. Chen)

Abstract: The defect regulation and p-n heterojunction of composites have gained significant attention due to their potential applications. Nitrogen (N) as doping heteroatoms and perylene-3,4,9,10-tetracarboximide (PDINH) as an appropriate n-type semiconductor were innovatively and reasonably selected to enhance the photocatalytic performance of pristine p-type cuprous oxide (Cu2O). In this study, the defect regulation of N doping (1) achieved the small-size effect of Cu2O, (2) optimized the electron features, and (3) improved the kinetics of reactive oxygen species. The p-n heterojunction with PDINH was developed to sharply improve the light utilization of Cu2O, from the UV region to the near-infrared region. As expected, the optimized Cu2NxO1-x/PDINH (x = 0.02) exhibited excellent long-term photocatalytic antibacterial activities, with antibacterial rates exceeding 91 % against Staphylococcus aureus and Pseudomonas aeruginosa. Defect regulation and p-n heterojunction of Cu2O-based composites thus provide a great deal of potential for future advancements in photocatalysis.

Key words: N doping, O vacancy, Photocatalytic, Antibacterial, DFT calculation