In Situ Real-Time and Reusable Antibacterial Mask Based on CoO@Ag Nanozyme with Enhanced Catalytic Activity

Area of Science:

• Materials Science
• Nanotechnology
• Environmental Science

Background:

• Disposable masks cause microplastic pollution and spread bacteria.
• Need for sustainable and effective antibacterial mask solutions.

Purpose of the Study:

• Develop a reusable mask with in situ antibacterial properties.
• Utilize a novel nanozyme for enhanced bacterial inactivation.

Main Methods:

• Synthesized Cobalt Oxide-Silver (CoO@Ag) nanozyme via room-temperature reduction.
• Integrated nanozyme into Polyacrylonitrile (PAN) fibers to create CAP masks.
• Evaluated antibacterial activity under dark and simulated sunlight conditions.

Main Results:

• CoO@Ag nanozyme demonstrated potent catalytic activity, generating reactive oxygen species.
• CAP masks inactivated bacteria within 20 minutes in the dark and 90 seconds under sunlight.
• Masks showed minimal temperature increase in winter sunlight and maintained high filtration efficiency and reusability.

Conclusions:

• The CAP mask offers a sustainable, high-performance solution for real-time antibacterial protection.
• Addresses the need for multi-scenario protective equipment balancing efficacy and environmental impact.
• Presents an innovative strategy for developing advanced protective gear.