...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Comment on 'Adsorption of Hydroxyl- and Ammo-Substituted Aromatics to Carbon Nanotubes'
【24h】

Comment on 'Adsorption of Hydroxyl- and Ammo-Substituted Aromatics to Carbon Nanotubes'

机译：关于“羟基和氨基取代的芳烃对碳纳米管的吸附”的评论

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Understanding the interactions between carbon nanotubes (CNTs) and environmentally relevant chemicals is crucial for potential environmental applications of CNTs as superior adsorbents and environmental risk assessment of both CNTs and contaminants. In a recent article (1), Chen et al. systematically investigated the adsorptive behavior of hydroxyl-substituted aromatics on CNTs and graphite. They found that 2,4-dichlorophenol and 2-naph-thol exhibited a greater adsorptive affinity to both adsorbents than their structurally similar compounds (1,3-dichlorobenzene and naphthalene, respectively). More interestingly, the adsorption of 2-naphthol showed a counterintuitive pH-dependence. For instance, when the pH was increased above its pK_a, the adsorption of 2-naphthol to graphite did not decrease but increased. By definitely ruling out several possible mechanisms as suggested in activated carbon adsorption for phenolic compounds and taking into account the electron-donating effect of the hydroxyl substituent, they concluded that π-π electron-donor-acceptor (EDA) interaction between π-elec-tron-rich aromatic ring(s) of the adsorbates and π-electron-depleted region of the graphene surface of CNTs/graphite was the primary mechanism for the enhanced adsorption of phenolic compounds. However, we believe that the authors neglected the effect of oxygen on the adsorption of these compounds to CNTs/graphite. This would alter the overall conclusion of their experiments. Detailed comments are presented in the following paragraphs.
机译：了解碳纳米管（CNT）与环境相关的化学物质之间的相互作用对于CNTs的潜在环境应用至关重要，因为它是高级吸附剂以及对CNTs和污染物的环境风险评估。在最近的一篇文章（1）中，Chen等人。系统地研究了羟基取代的芳族化合物对碳纳米管和石墨的吸附行为。他们发现2,4-二氯苯酚和2-萘酚对两种吸附剂的吸附亲和力均高于其结构相似的化合物（分别为1,3-二氯苯和萘）。更有趣的是，2-萘酚的吸附显示出与直觉相反的pH依赖性。例如，当pH增加到高于其pK_a时，2-萘酚在石墨上的吸附不会减少而是增加。通过明确排除活性炭吸附酚类化合物时建议的几种可能的机理，并考虑到羟基取代基的电子给体作用，他们得出结论，π-电子-之间的π-π电子给体-受体（EDA）相互作用。碳纳米管/石墨的石墨烯表面吸附物的富tron芳环和π电子贫化区是增强酚类化合物吸附的主要机理。但是，我们认为作者忽略了氧气对这些化合物在CNTs /石墨上的吸附作用。这将改变他们实验的总体结论。在以下段落中提供了详细的评论。

著录项

  • 来源
    《Environmental Science & Technology》 |2009年第9期|3398-3399|共2页
  • 作者

    Jin Jiang; Su-Yan Pang; Jun Ma;

  • 作者单位

    National Engineering Research Center of Urban Water Resources, State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150090, China Department of Urban and Civil Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China;

    National Engineering Research Center of Urban Water Resources, State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150090, China Department of Urban and Civil Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China;

    National Engineering Research Center of Urban Water Resources, State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150090, China Department of Urban and Civil Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号