We hereby report a reduced graphene oxide–titanium dioxide (rGO–TiO2)-loaded polyurethane (PU) nanofibrous membrane having visible-light-responsive photocatalytic activity and antifouling property. The functionality is significantly augmented by the hybridization of rGO–TiO2 with nanofibrous membrane. This results in a synergistic combination of high surface area of nanofiber and unique photocatalytic activity of rGO–TiO2. 10 wt% rGO–TiO2-loaded membrane showed an average fiber diameter of 271.83 ± 11.38 nm. Both the thermal stability and mechanical stability of the membrane increase after rGO–TiO2 loading. The optimized PU/10rGO–TiO2 membrane exhibited a water flux of 12810 ± 49.65 Lm−2 h−1, oil rejection of 85.50%, and flux recovery ratio of 88.10%. Theoretical evaluation of fouling model suggests that all the membranes follow cake filtration model. The photocatalytic activity of nanofibrous membrane increases with an increase in rGO–TiO2 concentration in the membrane, and PU/10rGO–TiO2 nanofibrous membrane showed 95% of degradation against methylene blue dye. Thus, the prepared membrane can be suggested for an ideal candidate for antifouling and photocatalytic templates in water filtration systems.

中文翻译：

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用还原氧化石墨烯-TiO2 装饰的聚氨酯纳米纤维膜用于水净化中的光催化模板

我们在此报告了一种具有可见光响应光催化活性和防污性能的还原氧化石墨烯-二氧化钛（rGO-TiO2）负载聚氨酯（PU）纳米纤维膜。rGO-TiO2 与纳米纤维膜的杂交显着增强了该功能。这导致纳米纤维的高表面积和 rGO-TiO2 的独特光催化活性的协同组合。10 wt% rGO-TiO2 负载的膜显示平均纤维直径为 271.83 ± 11.38 nm。加载 rGO-TiO2 后，膜的热稳定性和机械稳定性均增加。优化后的 PU/10rGO-TiO2 膜的水通量为 12810 ± 49.65 Lm-2 h-1，截油率为 85.50%，通量回收率为 88.10%。结垢模型的理论评估表明所有膜都遵循滤饼过滤模型。纳米纤维膜的光催化活性随着膜中 rGO-TiO2 浓度的增加而增加，PU/10rGO-TiO2 纳米纤维膜对亚甲蓝染料的降解率为 95%。因此，制备的膜可作为水过滤系统中防污和光催化模板的理想候选者。