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首页> 外文期刊>Environmental toxicology and chemistry >IMPACT OF CARBON NANOTUBE MORPHOLOGY ON PHENANTHRENE ADSORPTION
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IMPACT OF CARBON NANOTUBE MORPHOLOGY ON PHENANTHRENE ADSORPTION

机译：碳纳米管形态对菲吸附的影响

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摘要

The present study examined the roles of the specific surface area (SSA), diameter, and length of carbon nanotubes (CNT) on the adsorption of phenanthrene (PNT) by analyzing the adsorption isotherms obtained with several single-walled carbon nanotubes (SWNT) and multiwalled carbon nanotubes (MWNT). At low equilibrium concentrations (e.g., 1 ppb), MWNTs with larger outer diameters exhibited higher PNT adsorption capacity on an SSA basis than those with smaller diameters. With increasing equilibrium concentration, adsorption on an SSA basis became independent of MWNT diameter, and the total surface area controlled maximum adsorption capacity. A similar analysis for the adsorption of naphthalene, a planar molecule with one less benzene ring but 20 times higher solubility than PNT, showed no correlation with respect to MWNT outer diameter. The results indicated that the surface curvature of MWNT was more important on the adsorption of PNT than on the adsorption of naphthalene. Specific surface area normalized isotherms did not show a correlation between PNT adsorption and lengths of SWNTs and MWNTs. Characterization results indicated that the morphology of CNTs plays an important role on the SSA and pore volume. Data from the manufacturer may not always represent the characteristics of CNTs in a particular batch. Therefore, accurate characterization of CNTs is critical to systematically examine the behavior of CNTs, such as adsorption and transport, in environmental systems.
机译：本研究通过分析几种单壁碳纳米管（SWNT）的吸附等温线和碳纳米管（CNT）的比表面积（SSA），直径和长度对菲（PNT）吸附的作用，研究了碳纳米管和碳纳米管的吸附等温线。多壁碳纳米管（MWNT）。在低平衡浓度（例如1 ppb）下，外径较大的MWNT在SSA基础上比较小直径的MWNT具有更高的PNT吸附能力。随着平衡浓度的增加，基于SSA的吸附变得与MWNT直径无关，并且总表面积控制了最大吸附容量。萘吸附的相似分析表明，苯环少一个苯环，但溶解度比PNT高20倍，这与MWNT外径无关。结果表明，MWNT的表面曲率对PNT的吸附比对萘的吸附更重要。比表面积归一化等温线未显示PNT吸附与SWNT和MWNT的长度之间的相关性。表征结果表明，CNT的形态对SSA和孔体积起重要作用。制造商提供的数据可能并不总是代表特定批次中CNT的特性。因此，CNT的准确表征对于系统地检查CNT在环境系统中的行为（例如吸附和运输）至关重要。

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  • 来源
    《Environmental toxicology and chemistry》 |2012年第1期|p.73-78|共6页
  • 作者

    Onur Guven Apul; Ting Shao; Shujuan Zhang; Tanju Karanfil;

  • 作者单位

    Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina, USA;

    Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina, USA;

    Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina, USA;

    Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina, USA;

  • 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

    carbon nanotube; carbon nanotube diameter; morphology; naphtalene; phenanthrene;

    机译：碳纳米管碳纳米管直径;形态学;萘菲;

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