论文标题：Fabrication of Hierarchical Layer-by-Layer Assembled Diamond-based Core-Shell Nanocomposites as Highly Efficient Dye Absorbents for Wastewater Treatment

期刊：Scientific Reports

作者：Xinna Zhao, Kai Ma, Tifeng Jiao, Ruirui Xing, Xilong Ma, Jie Hu, Hao Huang, Lexin Zhang & Xuehai Yan

发表时间：2017/03/08

数字识别码：10.1038/srep44076

原文链接：https://www.nature.com/articles/srep44076/?utm_source=Other_website&utm_medium=Website_links&utm_content=RenLi-Nature-Scientific_Reports-Materials_Chemistry-China&utm_campaign=SCIREP_USG_JRCN_RL_shell_sciencenet_article_3rd_July

《科学报告》发表的一项研究Fabrication of Hierarchical Layer-by-Layer Assembled Diamond-based Core-Shell Nanocomposites as Highly Efficient Dye Absorbents for Wastewater Treatment展示了一种新型的基于钻石的纳米复合材料，该材料可以高效吸附废水中的染料。基于钻石的分层复合材料能够有效地实现化学改性和自组装，对拓宽钻石的应用具有重要意义。

来自中国燕山大学的Tifeng Jiao 、Jie Hu及其研究团队利用层层组装的方法制备了一种新型核壳结构钻石纳米复合材料，用于废水处理过程中对染料的吸附。合成这种新型复合材料首先需要对微钻石进行羧基功能化，研究人员通过钻石@石墨的氧化实现对钻石@石墨氧化复合物的化学改性。然后将封端的微钻石交替浸泡在含胺的聚乙烯亚胺溶液和含羧基的聚丙烯酸溶液中，这样可以在钻石表面形成吸附层，不断交替浸泡直至微钻石周围包裹了所需的吸附层数。研究人员进一步利用形态学和光谱技术对成功合成的核壳纳米复合材料进行表征，结果表明，该材料相比于无孔固体钻石颗粒具有更高的比表面积和介孔结构，因此具有更好的染料吸附能力。通过使用两种模型染料作为污水处理的污染物，证明层层组装核壳纳米复合材料具有良好的吸附能力。该研究为今后开发应用于污水处理的钻石复合材料以及纳米材料提供了新方向。

摘要：The effective chemical modification and self-assembly of diamond-based hierarchical composite materials are of key importance for a broad range of diamond applications. Herein, we report the preparation of novel core-shell diamond-based nanocomposites for dye adsorption toward wastewater treatment through a layer-by-layer (LbL) assembled strategy. The synthesis of the reported composites began with the carboxyl functionalization of microdiamond by the chemical modification of diamond@graphene oxide composite through the oxidation of diamond@graphite. The carboxyl-terminated microdiamond was then alternatively immersed in the aqueous solution of amine-containing polyethylenimine and carboxyl-containing poly acrylic acid, which led to the formation of adsorption layer on diamond surface. Alternating (self-limiting) immersions in the solutions of the amine-containing and carboxyl-containing polymers were continued until the desired number of shell layers were formed around the microdiamond. The obtained core-shell nanocomposites were successfully synthesized and characterized by morphological and spectral techniques, demonstrating higher surface areas and mesoporous structures for good dye adsorption capacities than nonporous solid diamond particles. The LbL-assembled core-shell nanocomposites thus obtained demonstrated great adsorption capacity by using two model dyes as pollutants for wastewater treatment. Therefore, the present work on LbL-assembled diamond-based composites provides new alternatives for developing diamond hybrids as well as nanomaterials towards wastewater treatment applications.

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期刊介绍：Scientific Reports is an online, open access journal from the publishers of Nature. We publish scientifically valid primary research from all areas of the natural and clinical sciences.

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（来源：科学网）