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首页> 外文期刊>Environmental Science & Technology >Adsorption of Monoaromatic Compounds and Pharmaceutical Antibiotics on Carbon Nanotubes Activated by KOH Etching
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Adsorption of Monoaromatic Compounds and Pharmaceutical Antibiotics on Carbon Nanotubes Activated by KOH Etching

机译：KOH蚀刻活化的碳纳米管对单芳族化合物和药物抗生素的吸附

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摘要

The relatively low surface area and micropore volume of carbon nanotubes limit their potential application as effective adsorbents for hydrophobic organic contaminants. In this study, KOH dry etching was explored to prepare activated single-walled carbon nanotubes (SWNT) and mltiWwalled carbon nanotubes (MWNT) for adsorption of model monoaromatic compounds (phenol and nitrobenzene) and pharmaceutical antibiotics (sulfamethoxazole, tetracycline, and tyiosin) in aqueous solutions. With activation, the specific surface area was increased from 410.7 m~2/g to 652.8 m~2/g for SWNT and from 157.3 m~2/g to 422.6 m~2/g for MWNT, and substantial pore volumes were created for the activated samples. Consistently, adsorption of the test solutes was enhanced 2-3 times on SWNT and 3-8times on MWNT. Moreover, the activated carbon nanotubes showed improved adsorption reversibility for the selected monoaromatics, as compared with the pristine counterparts, which was attributed to the more interconnected pore structure and less pore deformation of the activated adsorbents. This is the first study on the adsorption/desorption of aqueous organic contaminants by KOH-activated carbon nanotubes. The findings indicate that KOH etching is a useful activation method to improve the adsorption affinity and adsorption reversibility of organic contaminants on carbon nanotubes.
机译：碳纳米管的相对较低的表面积和微孔体积限制了它们作为疏水性有机污染物的有效吸附剂的潜在应用。在这项研究中，探索了KOH干法蚀刻以制备活化的单壁碳纳米管（SWNT）和多壁碳纳米管（MWNT），以吸附模型单芳族化合物（苯酚和硝基苯）和药物抗生素（磺胺甲恶唑，四环素和酪氨酸）。水溶液。随着活化，SWNT的比表面积从410.7 m〜2 / g增加到652.8 m〜2 / g，MWNT从157.3 m〜2 / g增加到422.6 m〜2 / g，并为激活的样本。一致地，在SWNT上测试溶质的吸附提高了2-3倍，在MWNT上提高了3-8倍。而且，与原始的对应物相比，活性碳纳米管对所选的单芳族化合物显示出改善的吸附可逆性，这归因于活化的吸附剂的孔结构更互连且孔变形较小。这是对KOH活化的碳纳米管对水性有机污染物的吸附/解吸的首次研究。研究结果表明，KOH蚀刻是一种有用的活化方法，可提高有机污染物在碳纳米管上的吸附亲和力和吸附可逆性。

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  • 来源
    《Environmental Science & Technology》 |2010年第16期|p.6429-6436|共8页
  • 作者

    LIANGLIANG JI; YUN SHAO; ZHAOYI XU; SHOURONG ZHENG; DONGQIANG ZHU;

  • 作者单位

    State Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Jiangsu 210093, P.R. China;

    rnState Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Jiangsu 210093, P.R. China;

    rnState Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Jiangsu 210093, P.R. China;

    rnState Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Jiangsu 210093, P.R. China;

    rnState Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, Jiangsu 210093, P.R. 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);
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