A photocatalytic membrane with significant degradation and antifouling performance has become an important part in wastewater treatment. However, the low catalyst loading on the polymer membrane limits its performance improvement. Herein, we fabricated poly(vinylidene fluoride) (PVDF) and poly(acrylic acid) (PAA) blend membranes with a rough surface via a vapor-induced phase separation (VIPS) process. Then Fe3+ was cross-linked with the carboxyl groups on the membrane surface and further in situ mineralized into β-FeOOH nanorods. The resultant membranes exhibit not only hydrophilicity and underwater superoleophobicity but also favorable separation efficiency and high water flux in oil-in-water emulsions separation. Under visible light irradiation, the membrane can degrade methylene blue (MB) to 95.2% in 180 min. More importantly, the membrane has a significant photocatalytic self-cleaning ability for crude oil with a flux recovery ratio (FRR) as high as 94.1%. This work brings a new strategy to fabricate the rough and porous surface for high loading of the hydrophilic photo-Fenton catalyst, improving the oil/water emulsion separation and antifouling performance of the membranes.
An electrode in situ catalytic oxidation of elemental mercury (Hg 0 ) in flue gas using Fenton-like catalysts in a self-made reactor was proposed. The catalysts were prepared by a hydrothermal method, and the catalysts were loaded on the electrode and could improve the removal efficiency of Hg 0 . About 240 μg/m 3 of elemental Hg 0 could be removed in 40 min. The morphology and structure information of the prepared catalysts were characterized by SEM, EDS, XRD, SEM, XPS and so on. The effects of operation parameters (voltage, inlet flow, electrolyte concentration, initial concentration of Hg 0 , pH of solution) were investigated. The above results showed the strong oxidative effect of hydroxyl radicals (·OH), which was produced by the catalysts playing a dominative role during Hg 0 removal reactions. Graphical
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