期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 241, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2020.116709
关键词
Nanohybrids; Nanofiber membrane; Antifouling studies; Electrostatic interactions; Oil water emulsion separation
Hierarchical carbon hybrid materials have gained more attention in recent times especially in the separation of pollutants from wastewater. In this study, a novel ternary composite of graphitic carbon nitride (G-C3N4) decorated on reduced graphene oxide (RGO) with titanium dioxide (TiO2) nanohybrids was synthesized using hydrothermal approach to modify the electrospun PVDF membranes for the separation of oil and dye in wastewater. The characteristic functional groups of G-C3N4, RGO and TiO2 (G-C3N4,/RGO/TiO2) nanohybrids were confirmed by X-ray diffraction (XRD) and X-ray photon electron spectroscopy. Moreover, the prepared membranes were also studied using field emission scanning electron microscope and X-ray photoelectron spectroscopy. Interestingly, the PVDF modified membranes displayed excellent thermal stability with lower contact angle, increased surface roughness and surface charges. It was due to the tunable covalent pi-pi interfaces among G-C3N4 and RGO 2D hierarchical structured nanosheets. Besides due to the reasonable hierarchical structure formation of chemical and physical defense mechanism, the modified membranes exhibited outstanding antifouling performance and different oil water emulsion rejections. The pure water flux for GT-4 membrane was around 1261.2 +/- 2 L/m(2).h and exhibited high oil water removal efficiency above 95.4 +/- 0.1% for different oils. The modified PVDF membranes also exhibited higher rejection rate of about 94.2 +/- 0.5% for methylene blue dye removals. These studies confirm the formation of hydration layer and hierarchical structure for membranes which can be employed in oil water emulsion separation and dye rejection studies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据