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首页> 外文期刊>Chemosphere >Reactivity of Pd/Fe bimetallic nanotubes in dechlorination of coplanar polychlorinated biphenyls
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Reactivity of Pd/Fe bimetallic nanotubes in dechlorination of coplanar polychlorinated biphenyls

机译：Pd / Fe双金属纳米管在共面多氯联苯脱氯中的反应性

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摘要

A new class of bimetallic materials based on palladium-decorated iron nanotubes is described that demonstrates high reactivity in dechlorination reactions. This high dechlorination efficiency was attributed to the high surface area to volume ratio of the hollow nanotubes structure. Herein, we evaluated the effect of different conditions, such as the nanotube size, and the palladium loading on the efficiency of the dechlorination of PCB 77, a model coplanar polychlorinated biphenyl (PCB), by the Pd/Fe bimetallic nanotubes system. The efficiency of the dechlorination was lowered by decreasing the tube diameter from 200 to 100 nm. In addition, the interior surface as well as the exterior surface of the as-synthesized Pd/Fe bimetallic nanotubes was found to contribute to the high efficiency of the dechlorination of PCB 77. The dechlorination of PCB 77 by Pd/Fe bimetallic nanotubes demonstrated small activation energy indicating diffusion controlled reaction. The as-prepared Pd/Fe bimetallic nanotubes showed extended lifetime activity when used in multiple dechlorination cycles.
机译：描述了一种基于钯修饰的铁纳米管的新型双金属材料，该材料在脱氯反应中显示出高反应活性。这种高的脱氯效率归因于中空纳米管结构的高表面积与体积比。在这里，我们评估了不同条件的影响，例如纳米管尺寸和钯负载量对Pd / Fe双金属纳米管系统PCB 77（模型共面多氯联苯）的脱氯效率的影响。通过将管径从200 nm减小到100 nm，降低了脱氯效率。此外，发现合成后的Pd / Fe双金属纳米管的内表面和外表面有助于PCB 77的高效脱氯。Pd/ Fe双金属纳米管对PCB 77的脱氯表现出较小的作用活化能表明扩散控制反应。当用于多个脱氯循环中时，所制备的Pd / Fe双金属纳米管显示出延长的使用寿命。

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  • 来源
    《Chemosphere》 |2013年第2期|165-171|共7页
  • 作者

    Elsayed M. Zahran; Dibakar Bhattacharyya; Leonidas G. Bachas;

  • 作者单位

    Department of Chemistry, University of Miami, Coral Cables, FL 33146, USA,Department of Applied Organic Chemistry, National Research Center, Egypt;

    Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA;

    Department of Chemistry, University of Miami, Coral Cables, FL 33146, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    polychlorinated biphenyls; bimetallic nanotubes; dechlorination; palladium/iron;

    机译：多氯联苯;双金属纳米管;脱氯;钯/铁;

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