Preparation and Characterization of TiO 2 /g-C 3 N 4 /PVDF Composite Membrane with Enhanced Physical Properties

摘要

TiO 2 /g-C 3 N 4 /PVDF composite membranes were prepared by a phase inversion method. A comparison of the performance and morphology was carried out among pure PVDF, g-C 3 N 4 /PVDF, TiO 2 /PVDF and TiO 2 /g-C 3 N 4 /PVDF composite membranes. The results of permeability and instrumental analysis indicated that TiO 2 and g-C 3 N 4 organic-inorganic composites obviously changed the performance and structure of the PVDF membranes. The porosity and water content of 0.75TiO 2 /0.25g-C 3 N 4 /PVDF composite membranes were 97.3 and 188.3 L/(m 2 ·h), respectively. The porosity and water content of the 0.75TiO 2 /0.25g-C 3 N 4 membranes were increased by 20.8% and 27.4%, respectively, compared with that of pure PVDF membranes. This suggested that the combination of organic-inorganic composite with PVDF could remarkably improve UTS, membrane porosity and water content.