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<p>The water dependent photodynamic antibacterial materials have wide applications in hypoxic environment. Polymerized 5,6-dihydroxyindole (lnd) can be mimics of siderphores for selective bacterial recognition. To develop bacterial targeting H<sub>2</sub>O<sub>2</sub> generators, Eu(III) doped nanoarchitectonics (BPEu@lnd) was synthesized by integrating europium-doped black phosphorus nanosheets with in-situ oxidative polymerization of lnd. Structural and optical characterizations confirmed broad-spectrum light absorption. The decreased band gap of BPEu@lnd (1.84&#xa0;eV) indicates a significant improvement in light absorption and conversion ability. Under red LED light irradiation, BPEu@lnd can convert water into H<sub>2</sub>O<sub>2</sub>. Additionally, this composite exhibited biofilm penetration capabilities, enabling targeted antibacterial action. This work indicates BPEu@lnd can be LED initiated photoresponsive H<sub>2</sub>O<sub>2</sub> generators and antibacterial material for bacterial treatment in hypoxic environments.</p>

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Europium-Dope Nanoarchitectonics as H2O2 Generators and Photo-Responsive Antibacterial Material

  • 期刊论文

  • 发表日期：

    2025年9月18日

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  • Kai Lv,
  • Wei-Jian Kong,
  • Qiu-Yun Chen,
  • Gao-Ji Wang,
  • Feng Chen

摘要

The water dependent photodynamic antibacterial materials have wide applications in hypoxic environment. Polymerized 5,6-dihydroxyindole (lnd) can be mimics of siderphores for selective bacterial recognition. To develop bacterial targeting H2O2 generators, Eu(III) doped nanoarchitectonics (BPEu@lnd) was synthesized by integrating europium-doped black phosphorus nanosheets with in-situ oxidative polymerization of lnd. Structural and optical characterizations confirmed broad-spectrum light absorption. The decreased band gap of BPEu@lnd (1.84 eV) indicates a significant improvement in light absorption and conversion ability. Under red LED light irradiation, BPEu@lnd can convert water into H2O2. Additionally, this composite exhibited biofilm penetration capabilities, enabling targeted antibacterial action. This work indicates BPEu@lnd can be LED initiated photoresponsive H2O2 generators and antibacterial material for bacterial treatment in hypoxic environments.