Poly(tetrafluoroethylene-co-hexafluoropropylene)/Ferric Oxide Hybrid Membranes for High Concentration of Dye Wastewater Treatment by Heterogeneous Fenton-Like Catalysis

Poly(tetrafluoroethylene- co -hexafluoropropylene) (FEP)/ferric oxide (Fe 2 O 3 ) hybrid flat-sheet membranes (HFM) (FEP/Fe 2 O 3 -HFM) with heterogeneous Fenton-like oxidation were fabricated by a facile hot pressing method for dye effluent treatment. The morphology and properties of the resultant membrane were found to be influenced by the addition of Fe 2 O 3 . With the increasing Fe 2 O 3 content, the porosity, water flux and contact angle of the resultant FEP/Fe 2 O 3 -HFM will raise up but deteriorate mechanical performance. The maximum methylene blue (MB) removal efficiency (99.69%) can be achieved using 10 wt% Fe 2 O 3 addition in membrane composition at following conditions: 40 mg L −1 MB concentration at pH 3, the dosage of 1.5 g g −1 (hydrogen peroxide, H 2 O 2 to FEP/Fe 2 O 3 -HFM) in cross-flow filtration. In addition, FEP/Fe 2 O 3 -HFM shows commendable reusability enduring vigorous catalysis due to the inherit stability from fluorinated polymer. Due to high-efficient separation and good removal performance to high concentration of dye (e.g. 250 mg L −1 MB), our FEP/Fe 2 O 3 -HFMs show great promise in aqueous pollutant treatment by heterogeneous Fenton-like reaction. Graphic Abstract