Organic Pollutants Degradation Based on Poled Dielectric Films by Contact-Electro-Catalysis

Contact-electro-catalysis (CEC) is an emerging approach for promoting chemical reactions, with conventional dielectric powders being the most commonly used CEC catalysts. However, the dielectric powders are usually difficult to recycle, and the membrane counterparts suffer from low efficiency. Here, we devised a plate polarization strategy to enhance the contact electrification (CE) ability and, thus, the CEC efficiency of dielectric films. Exemplified by fluorinated ethylene propylene films, the density of fluorine groups on the surface could increase due to electrostatic polarizations, which is beneficial for the subsequent production of reactive oxygen species through CEC. A 5 ppm methyl orange aqueous solution could be completely degraded after ultrasonication for 300 min. We expect that this study could pave the way for the practical application of film-based CEC, offering a sustainable and cost-effective solution for environmental pollution control.