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首页> 外文期刊>Separation and Purification Technology >Effect of reduced graphene oxide/TiO2 nanocomposite with different molar ratios on the performance of PVDF ultrafiltration membranes
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Effect of reduced graphene oxide/TiO2 nanocomposite with different molar ratios on the performance of PVDF ultrafiltration membranes

机译：不同摩尔比还原氧化石墨烯/ TiO2纳米复合材料对PVDF超滤膜性能的影响

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摘要

A partially reduced graphene oxide (rGO)/TiO2 nanocomposite with five different molar ratios (rGO/TiO2: 3/97, 30/70, 50/50, 70/30 and 90/10) were synthesized and characterized using X-ray diffraction and scanning electron microscopy (SEM) techniques. The polyvinylidene fluoride (PVDF) mixed matrix membranes containing 0.05 wt.% of the nanocomposites were prepared by phase inversion method. The effect of rGO/TiO2 additive on the morphology and performance of prepared blended membranes was studied by atomic force microscopy (AFM), SEM, energy dispersive X-ray (EDX), FTIR, water contact angle, porosity and permeation measurements, rejection tests and antifouling parameters. The SEM images revealed finger-like structure of the membranes and EDX analysis confirmed well distribution of rGO/TiO2 nanocomposite in the polymer matrix. The rGO/TiO2/PVDF membranes showed enhanced hydrophilicity, higher pure water flux and flux recovery ratio compared to the bare PVDF. A comparison of pure water flux of TiO2 and rGO/TiO2 containing membranes showed that dispersion of inorganic TiO2 nanoparticles on the GO surface decreased the aggregation of the nanoparticles and improved the characteristics of the resulted mixed matrix membrane. The blended membrane containing 0.05 wt.% rGO/TiO2 nanocomposite with GO to TiO2 ratio of 70/30 showed improved permeability and antifouling performance. (C) 2014 Elsevier B.V. All rights reserved.
机译：合成了具有五种不同摩尔比（rGO / TiO2：3 / 97、30 / 70、50 / 50、70 / 30和90/10）的部分还原的氧化石墨烯（rGO）/ TiO2纳米复合材料，并使用X射线衍射对其进行了表征和扫描电子显微镜（SEM）技术。通过相转化法制备了包含0.05重量％的纳米复合材料的聚偏二氟乙烯（PVDF）混合基质膜。通过原子力显微镜（AFM），扫描电镜，能量色散X射线（EDX），FTIR，水接触角，孔隙度和渗透率测量，排斥试验研究了rGO / TiO2添加剂对制备的共混膜的形态和性能的影响和防污参数。 SEM图像显示了膜的手指状结构，EDX分析证实了rGO / TiO2纳米复合材料在聚合物基质中分布良好。与裸PVDF相比，rGO / TiO2 / PVDF膜显示出增强的亲水性，更高的纯水通量和通量回收率。 TiO2和含rGO / TiO2的纯水通量膜的比较表明，无机TiO2纳米颗粒在GO表面的分散减少了纳米颗粒的聚集，并改善了所得混合基质膜的特性。含有0.05 wt。％rGO / TiO2纳米复合材料且GO与TiO2之比为70/30的共混膜表现出改善的渗透性和防污性能。 （C）2014 Elsevier B.V.保留所有权利。

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