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Advanced ZnO Nanorods and Metal–Organic Frameworks for Sustainable Photocatalytic Microplastic Degradation
Original title: Advanced ZnO Nanorods and Metal–Organic Frameworks for Sustainable Photocatalytic Microplastic Degradation
Summary
Microplastics are turning up everywhere in our food and water, and scientists are testing special materials—like zinc oxide nanorods and metal-organic frameworks (MOFs)—that use sunlight to break these tiny plastic bits down into harmless components. This review of existing research finds that while zinc oxide works well, it might also cause cell damage in the process, whereas MOFs appear to be a safer, more eco-friendly option. The takeaway: before we roll out these cleanup technologies, we need to make sure the "cure" doesn't introduce new health risks of its own.
The increasing presence of microplastics in the aquatic and terrestrial food chains calls for the need to come up with innovative and effective remediation approaches. Such innovations as zinc oxide (ZnO) structures and metal–organic frameworks (MOFs) are examined as the second generation of photocatalysts for degrading microplastics under sunlight. We will focus on the latest advances and discuss the structure of photocatalytic processes, their functioning under various light conditions, and their environmental impacts, especially environmental safety and ecotoxicity. ZnO structures are even better photocatalysts because they form reactive oxygen species (ROS) as good as other metal oxides. However, their possible cytotoxicity and the ability to generate oxidative stress require serious evaluation. MOFs, on the contrary, offer physicochemical properties, environmental safety, ecotoxicity, and environmentally friendly synthesis pathways, making them a worthy substitute. The review underscores the urgency of incorporating environmental safety and ecotoxicity into the design of photocatalysts, thereby unlocking their full potential while avoiding environmental or human health risks. Moving forward in the field of sustainable nanotechnology to remove microplastics will provide the way to come up with green innovations and hence guarantee the effectiveness of combating plastic pollution in long-term stability.