Fabrication of Manganese Oxide/PTFE Hollow Fiber Membrane and Its Catalytic Degradation of Phenol

P-aminophenol is a hazardous environmental pollutant that can remain in water in the natural environment for long periods due to its resistance to microbiological degradation. In order to decompose p-aminophenol in water, manganese oxide/polytetrafluoroethylene (PTFE) hollow fiber membranes were prepared. MnO(2) and Mn(3)O(4) were synthesized and stored in PTFE hollow fiber membranes by injecting MnSO(4)·H2O, KMnO(4), NaOH, and H(2)O(2) solutions into the pores of the PTFE hollow fiber membrane. The resultant MnO(2)/PTFE and Mn(3)O(4)/PTFE hollow fiber membranes were characterized using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and thermal analysis (TG). The phenol catalytic degradation performance of the hollow fiber membranes was evaluated under various conditions, including flux, oxidant content, and pH. The results showed that a weak acid environment and a decrease in flux were beneficial to the catalytic degradation performance of manganese oxide/PTFE hollow fiber membranes. The catalytic degradation efficiencies of the MnO(2)/PTFE and Mn(3)O(4)/PTFE hollow fiber membranes were 70% and 37% when a certain concentration of potassium monopersulfate (PMS) was added, and the catalytic degradation efficiencies of MnO(2)/PTFE and Mn(3)O(4)/PTFE hollow fiber membranes were 50% and 35% when a certain concentration of H(2)O(2) was added. Therefore, the manganese oxide/PTFE hollow fiber membranes represent a good solution for the decomposition of p-aminophenol.