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首页> 外文期刊>Environmental Science & Technology >Comparative Study of Graphene Hydrogels and Aerogels Reveals the Important Role of Buried Water in Pollutant Adsorption
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Comparative Study of Graphene Hydrogels and Aerogels Reveals the Important Role of Buried Water in Pollutant Adsorption

机译：石墨烯水凝胶和气凝胶的比较研究揭示了埋水在污染物吸附中的重要作用

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摘要

Water as the universal solvent has well-demonstrated its ability to dissolve many substances, but buried water inside different nanoporous materials always exhibits some unusual behaviors. Herein, 3D porous graphene hydrogel (GH) is developed as a super-adsorbent to remove different pollutants (antibiotics, dyes, and heavy ions) for water purification. Due to its highly porous structure and high content of water, GH also demonstrated its super adsorption capacity for adsorbing and removing different pollutants (antibiotics, dyes, and heavy ions) as compared to conventional graphene aerogel (GA). More fundamentally, the buried-water enhanced adsorption mechanism was proposed and demonstrated, such that buried water in GH plays the combinatorial roles as (1) supporting media, (2) transport nanochannels, and (3) hydrogen bondings in promoting pollutant adsorption. In parallel, molecular dynamics simulations further confirm that buried water in GH has the stronger interaction with pollutants via hydrogen bonds than other buried alcohols. GH integrates the merit of both graphene (e.g., fine chemical resistance and excellent mechanical property) and hydrogel (e.g., high water content, porous structure, and simple solution-based processability and scalability), giving it promising potential for environmental applications.
机译：作为通用溶剂的水已经很好地证明了其溶解多种物质的能力，但是在不同的纳米多孔材料中埋藏的水总是表现出一些不寻常的行为。在本文中，开发了3D多孔石墨烯水凝胶（GH）作为超级吸附剂，可以去除不同的污染物（抗生素，染料和重离子）以进行水净化。由于其高度多孔的结构和高水含量，与传统的石墨烯气凝胶（GA）相比，GH还表现出了超强的吸附能力，可以吸附和去除不同的污染物（抗生素，染料和重离子）。更根本地，人们提出并证明了埋水增强吸附的机理，从而使GH中的埋水发挥了以下组合作用：（1）支持介质，（2）传输纳米通道和（3）氢键促进污染物吸附。同时，分子动力学模拟进一步证实，GH中的地下水与氢的污染物相比，通过氢键与污染物的相互作用要强于其他地下醇。 GH融合了石墨烯（例如，优良的耐化学性和出色的机械性能）和水凝胶（例如，高水含量，多孔结构以及基于溶液的易加工性和可扩展性）的优点，使其在环境应用方面具有广阔的潜力。

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  • 来源
    《Environmental Science & Technology》 |2017年第21期|12283-12292|共10页
  • 作者

    Jie Ma; Yiran Sun; Mingzhen Zhang; Mingxuan Yang; Xiong Gong; Fei Yu; Jie Zheng;

  • 作者单位

    State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China;

    State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China;

    Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States;

    State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China,Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States;

    College of Polymer Science and Polymer Engineering and The University of Akron, Akron, Ohio 44325, United States;

    College of Chemistry and Environmental Engineering, Shanghai Institute of Technology, Shanghai 2001418, China;

    Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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