Abstract The nickel nanoparticles decorated graphene oxide-carbon nanotubes nanocomposite has been prepared through a novel molecular-level-mixing method followed by a freeze-drying and subsequent reduction process. The resulting products showed a well-dispersed 3D structure and demonstrated excellent performance in removing Rhodamine B (RhB) from the aqueous solution through a synergistic effect of physical adsorption and photo-degradation. The physical adsorption of RhB by this nanocomposite followed the pseudo-second-order and could be ascribed to its high surface area. The nanocomposite containing 30 wt.% of Ni exhibited the highest removal capacity of ca. 41.5 mg g-1 in 5 ppm RhB solution. Meanwhile, because of the ferromagnetism of Ni nanoparticles coated, the nanocomposite could be easily collected and recycled after the removal of dye via magnetic separation. Thus, the nanocomposite have demonstrated great potentials as an efficient adsorbent with good photocatalytic performance for removing organic dyes from wastewater.

中文翻译：

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通过镍装饰的氧化石墨烯-碳纳米管纳米复合材料有效去除染料

摘要 镍纳米粒子修饰的氧化石墨烯-碳纳米管纳米复合材料是通过一种新型的分子级混合方法、冷冻干燥和随后的还原过程制备的。所得产物显示出良好分散的 3D 结构，并通过物理吸附和光降解的协同作用从水溶液中去除罗丹明 B (RhB) 表现出优异的性能。这种纳米复合材料对 RhB 的物理吸附遵循伪二级，可以归因于其高表面积。含有 30 wt.% Ni 的纳米复合材料表现出最高的去除能力约。41.5 mg g-1 在 5 ppm RhB 溶液中。同时，由于包覆的镍纳米粒子的铁磁性，通过磁分离去除染料后，纳米复合材料可以很容易地收集和回收利用。因此，该纳米复合材料作为一种具有良好光催化性能的高效吸附剂，具有去除废水中有机染料的巨大潜力。