Fabrication of Anatase Tio2/Pvdf Hydrophilic Compostie Membrane for Oil-in-Water Emulsion Separation and Dye Photocatalytic Degradation

The effective separation of oil-in-water emulsions and degradation of organic dyes are great significance for solving water pollution problem. In this view, the bifunctional separation membrane that enable superior separation performance of oil-in-water emuslions and photocatalytic degradation performance of organic dyes was successfully prepared by electrostatic spinning technology and hydrothermal reaction method. A large number of -COOH and anatase TiO2 with Ti3+ and oxygen vacancies particles on the membrane surface make the composite membrane have strong hydrophilic properties (WCA=15.65), underwater oleophobic properties (UOCA=156.69) and photocatalytic performance. These composite membrane has high separation efficiency and outstanding anti-fouling performance, the oil removal efficiency reaches 98.95% and the FRR reaches 99.19% for soybean oil-in-water emulsion. In addition, the composite membrane has outstanding photocatalytic degradation performance, with 97% and 90.2% degradation of RhB and AG-25 under UV conditions, respectively. Several oil-in-water separation and dye degradation experiments show that the PVDF composite membrane has excellent reuse performance. Based on these results, this study opens new avenues for the preparation of multifunctional reusable membranes for the water treatment field.