Iron catalyst turns plastic waste into vinegar using sunlight

Researchers at the University of Waterloo have developed an innovative solar-powered method to convert plastic waste, including common polymers like PVC, PP, PE, and PET, into acetic acid—the main component of vinegar. This process uses a bio-inspired cascade photocatalysis system featuring isolated iron single atoms embedded in a carbon nitride framework. When exposed to sunlight, the catalyst triggers a sequence of chemical reactions that selectively break down plastics at the molecular level into acetic acid, operating efficiently in water without relying on heat or fossil fuels. This approach is particularly promising for addressing microplastic pollution in aquatic environments and can handle mixed plastic waste streams, a critical factor for practical applications. The catalyst design draws inspiration from natural enzymatic processes, enabling controlled and efficient degradation of plastics into a valuable chemical with broad industrial uses, from food production to chemical manufacturing. The research team, led by PhD student Wei Wei under Professor Yimin Wu, also conducted a techno-economic analysis indicating promising financial and societal benefits. Importantly, the