Construction and synthesis of NiCo2O4 nanozyme for enhanced antibacterial performance

Developing effective and low-cost enzyme-like nanomaterials to kill bacteria is vital for human health. Herein, nanorod-assembled NiCo₂O₄microspheres were prepared though a facile hydrothermal method, andshowed highly enhanced peroxidase-like activity compared to pure Co₃O₄due to its large surface area and abundant active sites. The NiCo₂O₄possess the ability to catalyze H₂O₂to generate large amounts of •O^2-, which can be used for bacteriostatic applications. In particular, the antibacterial system combining the spiky NiCo₂O₄particles and a low concentration of H₂O₂(100μM) exhibits an excellent bacteriostatic efficiency against bothEscherichia coli(94.44%) andStaphylococcus aureus(93.45%).