With the extensive use of nanomaterials in commercial products will lead to environmental contamination which may cause serious health issue in the future. Till now, limited scavengers are available for the capture of such emerging nanopollutants from water. The aim of this work was to synthesize hybrid ternary co-polymer membranes coated micrometer-sized carbon fiber aerogels (MCFAs) for the removal of emerging nanopollutants from water and to investigate the mechanisms involved. The MCFAs was fabricated by direct pyrolysis of cotton at an inert atmosphere. Post-modification with chitosan (CS) and dopamine-polyethylenimine (PEI) complex generated porous texture and amine-coated MCFAs, followed by protonation using diluted acid solution. Surface functional groups and morphology of the ternary CS and dopamine-PEI co-coated MCFAs were systematically characterized. The as-obtained hybrid composite was successfully used for the removal of citrate-capped gold and silver nanoparticles from water. Equilibrium data were well fitted to the Langmuir isotherm model with the maximal adsorption capacities of 31.2 mg g-1 (Au NPs) and 41.8 mg g-1 (Ag NPs) at ambient temperature. The highest adsorption capacities reached 30.2 mg g-1 (Au NPs) and 34.9 mg g-1 (Ag NPs) at the equilibrium concentrations, which were very close to the maximum monolayer adsorption capacities. In addition, the adsorption of both nanoparticles on as-prepared composite followed pseudo-second-order kinetics model. Thereupon, this work may pave the way for enhancing the property of MCFAs during removal of nanopollutants from medical and/or industrial wastewaters.

中文翻译：

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贻贝启发的杂化共聚物粘附在壳聚糖涂层的微尺寸碳纤维气凝胶上，用于高效的纳米粒子清除剂

随着纳米材料在商业产品中的广泛使用，将导致环境污染，这可能在将来引起严重的健康问题。到目前为止，有限的清除剂可用于从水中捕获这种新兴的纳米污染物。这项工作的目的是合成混合的三元共聚物膜涂覆的微米级碳纤维气凝胶（MCFA），用于从水中去除新兴的纳米污染物，并研究其中的机理。MCFA是通过在惰性气氛下将棉花直接热解制备的。用壳聚糖（CS）和多巴胺-聚乙烯亚胺（PEI）配合物进行后修饰会产生多孔质感和胺涂层的MCFA，然后使用稀酸溶液进行质子化。系统地表征了三元CS和多巴胺-PEI包覆的MCFA的表面官能团和形态。如此获得的杂化复合材料已成功用于从水中去除柠檬酸盐封端的金和银纳米颗粒。平衡数据非常适合Langmuir等温模型，在环境温度下最大吸附容量为31.2 mg g-1（Au NPs）和41.8 mg g-1（Ag NPs）。在平衡浓度下，最高吸附容量达到30.2 mg g-1（Au NPs）和34.9 mg g-1（Ag NPs），非常接近最大单层吸附能力。此外，两种纳米颗粒在制备的复合材料上的吸附均遵循伪二级动力学模型。于是，