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<p>Nanozymes hold promise for controlling plant bacterial diseases, but conventional ones suffer from low bacterial affinity, inefficient enzyme-like activity, and thus poor antibacterial efficacy. Here, we report a photo-enhanced copper single-atom (CuSA)-loaded ZnS@MoS<sub>2</sub> nanozyme with high affinity and efficient peroxidase (POD)-like activity. CuSA-loaded ZnS@MoS<sub>2</sub> exhibits higher efficacies against bacterial speck and bacterial wilt diseases in tomatoes, surpassing the commercial thiodiazole copper by 13.33% and 52.77%, respectively. Mechanistically, it catalyzes H<sub>2</sub>O<sub>2</sub> to generate toxic hydroxyl radicals (·OH) via POD-like activity; near-infrared irradiation boosts this activity by lowering activation energy and accelerating mass transfer. Density functional theory (DFT) calculations reveal that CuSA-loaded ZnS@MoS<sub>2</sub> captures bacteria via Metal-O-P bonds on cell surfaces, reducing ·OH short-range quenching to enhance efficacy. This SA nanozyme design, integrating intelligent capture and photo-enhanced activity, offers an insight for plant bacterial disease control.</p>

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Copper single-atom nanozyme with intelligent capture and photo-enhanced activity for controlling plant bacterial diseases

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月20日

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  • Hao Jiang,
  • Yue Xing,
  • Zhifeng Ma,
  • Guangjin Fan,
  • Zhongwei Liu,
  • Song Yang,
  • Lin Cai

摘要

Nanozymes hold promise for controlling plant bacterial diseases, but conventional ones suffer from low bacterial affinity, inefficient enzyme-like activity, and thus poor antibacterial efficacy. Here, we report a photo-enhanced copper single-atom (CuSA)-loaded ZnS@MoS2 nanozyme with high affinity and efficient peroxidase (POD)-like activity. CuSA-loaded ZnS@MoS2 exhibits higher efficacies against bacterial speck and bacterial wilt diseases in tomatoes, surpassing the commercial thiodiazole copper by 13.33% and 52.77%, respectively. Mechanistically, it catalyzes H2O2 to generate toxic hydroxyl radicals (·OH) via POD-like activity; near-infrared irradiation boosts this activity by lowering activation energy and accelerating mass transfer. Density functional theory (DFT) calculations reveal that CuSA-loaded ZnS@MoS2 captures bacteria via Metal-O-P bonds on cell surfaces, reducing ·OH short-range quenching to enhance efficacy. This SA nanozyme design, integrating intelligent capture and photo-enhanced activity, offers an insight for plant bacterial disease control.