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<p>The development of efficient photocatalyst heterogeneous junctions has become a major focus of research for removing microbial pollution. In the current work, we assembled I-doped g-C<sub>3</sub>N<sub>4</sub> decorated with AgI (AgI/ICN) heterostructures (with different AgI ratios (from 10 to 40 wt%), to achieve high visible light–based photocatalytic disinfection efficiency toward <i>Staphylococcus aureus</i> (<i>S. aureus</i>). Under visible illumination, the optimum 20wt%-AgI/ICN hybrid achieved complete inactivation efficiency, almost 10-, 8-, and 5-times greater than that of undoped CN, ICN, and AgI, respectively. I-doping enlarges the CN response in the visible light region, while the type II heterojunction developed between ICN and AgI leads to an effective separation of charge-carriers. According to the trapping tests, the key reactive oxygen species (ROS) inactivating <i>S. aureus</i> were <sup>•</sup>O<sub>2</sub><sup>−</sup> and h<sup>+</sup>, which approves the suggested mechanism.</p>

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Synthesis of AgI-decorated I-doped g-C3N4 photocatalyst systems for advanced bacterial inactivation performance

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • Saad H. Ammar,
  • Marwa F. Abdul Jabbar,
  • Israa Sh. Mohammed,
  • Hussein J. Khadim

摘要

The development of efficient photocatalyst heterogeneous junctions has become a major focus of research for removing microbial pollution. In the current work, we assembled I-doped g-C3N4 decorated with AgI (AgI/ICN) heterostructures (with different AgI ratios (from 10 to 40 wt%), to achieve high visible light–based photocatalytic disinfection efficiency toward Staphylococcus aureus (S. aureus). Under visible illumination, the optimum 20wt%-AgI/ICN hybrid achieved complete inactivation efficiency, almost 10-, 8-, and 5-times greater than that of undoped CN, ICN, and AgI, respectively. I-doping enlarges the CN response in the visible light region, while the type II heterojunction developed between ICN and AgI leads to an effective separation of charge-carriers. According to the trapping tests, the key reactive oxygen species (ROS) inactivating S. aureus were •O2− and h+, which approves the suggested mechanism.