首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Removal of Pb(II) Ion Using PAMAM Dendrimer Grafted Graphene and Graphene Oxide Surfaces: A Molecular Dynamics Study
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Removal of Pb(II) Ion Using PAMAM Dendrimer Grafted Graphene and Graphene Oxide Surfaces: A Molecular Dynamics Study

机译:使用PAMAM树枝状聚合物接枝石墨烯和石墨烯氧化物表面去除PB(II)离子:分子动力学研究

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摘要

The dendrimer polyamidoamine (PAMAM) has been widely applied in environmental applications as adsorbents for wastewater treatment. In this work, molecular dynamics simulations are conducted to understand the effect of dendrimer grafted graphene and graphene oxide on the structural and dynamical properties of the Pb2+ ion. The adsorption capacity of the metal ion is improved significantly, over 60%, using carboxyl terminal groups of a dendrimer molecule grafted on a graphene oxide surface. We examine the self-diffusion coefficient and residence time of Pb2+ ion near graphene and graphene oxide surfaces grafted with PAMAM dendrimers using terminal groups, -COO- and -OH. Further, the potential of mean force is analyzed to understand the role of different surface groups in enhancing the adsorption of the metal ion.
机译:树枝状聚酰胺聚酰胺(PAMAM)已广泛应用于环境应用中作为废水处理的吸附剂。 在这项工作中,进行分子动力学模拟,以了解树枝状聚合物接枝石墨烯和石墨烯氧化物对PB2 +离子的结构和动态性质的影响。 金属离子的吸附容量显着提高,超过60%,使用接枝在石墨烯表面上的树枝状聚合物分子的羧基末端基团。 使用末端基团,-COO-和-OH,检查石墨烯和石墨烯和石墨烯氧化物表面附近的PB2 +离子附近的自扩散系数和停留时间。 此外,分析平均力的潜力以了解不同表面基团在增强金属离子的吸附方面的作用。

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