Peroxidase-like and oxidase-like nanozyme activities of reusable Mn–Co–S–Se/Ni foam for antibacterial application

Abstract

Developing a stable and reusable material for antibacterial application in an enzyme-like system is still a challenge. Herein, Mn–Co–S–Se (MnCo2SxSe4–x)/Ni foam (NF) are synthesized by introducing S2– and Se2– in MnCo2O4/NF with a facile hydrothermal approach. With the different molar ratios of S/Se, the surface morphology of MnCo2SxSe4–x/NF shows different growth and the catalytic activity also presents regular changes. MnCo2S3.1Se0.9/NF possesses a high enzyme-like ability with higher Vmax than natural horseradish peroxidase. Due to the outstanding peroxidase-like activity, MnCo2S3.1Se0.9/NF also exhibits broad-spectrum bactericidal performance towards Escherichia coli and Staphylococcus aureus which stems from the formation of ·O2– from H2O2. In the reutilization experiment, the enzyme-like activity keeps a stable value after 25 cyclic tests and the bactericidal performance is still stable after 10 cyclic tests, proving that MnCo2S3.1Se0.9/NF possesses relative stability and reusability. This research showed the great prospect of new energy and environmental catalysis.