Iron oxide/graphenic carbon hybrid photocatalyst for decomposition of PFAS

Abstract

Abstract In addressing the urgent global challenge posed by per- and polyfluoroalkyl substances (PFAS) contamination, a class of pollutants notorious for their persistence in aquatic ecosystems and human bloodstream, this research introduces a game-changing approach. Contrary to prevailing beliefs that effective PFAS degradation necessitates complex, cost-intensive methods, our study unveils a frugal, scalable iron oxide/graphenic carbon (Fe/g-C) hybrid photocatalyst synthesized with simplicity. Remarkably, this catalyst rapidly decomposes perfluorooctanoic acid (PFOA), achieving rates of ≥85% in just 3 hours at a UV fluence of 30.7 W cm-2. Consistency in performance is further evidenced as the photocatalyst sustains decomposition rates of ≥85% over 30 hours under a UV fluence of 1.42±0.05 mW cm-2. Not only does this work spotlight the potential of graphenic carbon-doped composites in tackling stubborn organic pollutants, but it also demonstrates a path to more efficient and practical PFAS degradation by reducing requisite UV fluence rates. This research serves as both an enlightening revelation and a promising solution to a pressing environmental concern.