摘要：

Developing highly active Fenton-like materials for the decontamination of water is a hot topic. Nanosized Fe304 particles are green catalysts for environmental remediation, but their application is limited by their low catalytic activity. Herein, Fe304 rhombic dodecahedral nanoparticles (Fe304-R) with exposed {110} facets were synthesized via the solvothermal method and used as a Fenton-like catalyst for the degradation of bisphenol A (BPA). Consequently, ~100% of BPA was removed using Fe304-R/ H2O2 at pH = 5.0, which was higher than that by commercial Fe304. Multiple experiments confirmed the presence of abundant =Fe(n) active sites on the surface of Fe304-R, but they were unstable, resulting in the dissolution of =Fe(n) from the solid surface via oxidation, and thus the homogeneous reaction was not negligible in the Fe304-R/H2O2 process. However, hydroxyl radicals (HO*) were still the primary reactive species, playing a dominant role in the removal of BPA. Consequently, the degradation of BPA was easily disturbed by HC03" and natural organic matter (NOM). Unfortunately, the inactivation of Fe304-R was observed in cycle experiments, which is ascribed to the stabilization of the surface of Fe304-R during the oxidation process, reducing the surface active sites of = Fe(n). Therefore, this study provides new insight into the Fenton-like oxidation process for the degradation of pollutants by regulating the morphology of Fe3Q4 nanoparticles.

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