氧化石墨烯(GO)是一种很具应用潜力的石墨烯纳米材料,由于具备超大的比表面积和表面带电的特性,在对水污染物吸附方面具有优异的性能.然而,氧化石墨烯良好的水中分散性以及纳米尺寸特性,使其在应用过程中难以控制和回收.文中针对此问题,采用聚醚砜对氧化石墨烯进行包覆,通过液-液相分离方法制备出具有核壳结构的氧化石墨烯-聚醚砜复合微球.选用阳离子染料亚甲基蓝(MB)作为被吸附物来考察微球的吸附量、吸附动力学以及吸附热力学.研究发现,该复合微球对MB的最大吸附量高达363.21 mg/g,并且可通过提高壳层的亲水性来增大微球的吸附速率.
Graphene oxide (GO),a kind of graphene nanomaterials with potential application,possessed very potential adsorption capacities to various water contaminants due to the ultra-large surface area and the nature of electric charge on the surface.It is difficult to be controlled and collected in the application process because of favorable dispersion in water and nano size characteristics.In this study,a C)-based polyethersulfone composite particle with core-shell structure (PES-GO) was prepared by liquid-liquid phase separation method.Methylene blue (MB),a cationic dye,was chosen as the adsorbate to investigate the adsorption capability,adsorption kinetics and thermodynamics of the microspheres.It is shown that the PES-GO core-shell particles display an adsorption capacity as high as 363.21 mg/g for MB dye,and the adsorption rates could be improved by modifying the PES shells with hydrophilic fillers.
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