Polyurethane nanofibrous membranes decorated with reduced graphene oxide–TiO2 for photocatalytic templates in water purification
Polyurethane nanofibrous membranes decorated with reduced graphene oxide–TiO2 for photocatalytic templates in water purification
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DOI：
10.1007/s10853-020-04414-y
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发表时间：
2020-02
影响因子：
4.5
通讯作者：
Suja P. Sundaran;C. Reshmi;P. Sagitha;A. Sujith
中科院分区：
文献类型：
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作者：
Suja P. Sundaran;C. Reshmi;P. Sagitha;A. Sujith
本文报道了一种还原氧化石墨烯-二氧化钛（rGO-TiO 2）负载的聚氨酯（PU）纳米纤维膜，其具有可见光响应的光催化活性和光催化性能。通过将rGO-TiO 2与纳米纤维膜杂化，功能性显著增强。这导致高表面积的纳米TiO 2和rGO-TiO 2独特的光催化活性的协同组合。10重量%的rGO-TiO 2负载膜显示出271.83 ± 11.38 nm的平均纤维直径。负载rGO-TiO 2后，膜的热稳定性和机械稳定性均有所提高。优化后的PU/10 rGO-TiO 2膜的水通量为12810 ± 49.65 Lm− 2 h −1，油截留率为85.50%，通量恢复率为88.10%。对膜污染模型的理论分析表明，所有膜均遵循滤饼过滤模型。随着膜中rGO-TiO 2浓度的增加，PU/10 rGO-TiO 2纳米纤维膜的光催化活性逐渐增强，对亚甲基蓝染料的降解率达到95%。因此，所制备的膜可以建议作为水过滤系统中的光催化和光催化模板的理想候选者。
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–TiO2with 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–TiO2loading. The optimized PU/10rGO–TiO2membrane exhibited a water flux of 12810 ± 49.65 Lm−2h−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–TiO2concentration in the membrane, and PU/10rGO–TiO2nanofibrous 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.