Enhanced electrical contact of microbes using Fe3O4/CNT nanocomposite anode in mediator-less microbial fuel cell
Enhanced electrical contact of microbes using Fe3O4/CNT nanocomposite anode in mediator-less microbial fuel cell
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DOI：
10.1016/j.bios.2014.02.044
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发表时间：
2014-08-15
影响因子：
12.6
通讯作者：
Nahm, Kee Suk
中科院分区：
文献类型：
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作者：
Park, In Ho;Christy, Maria;Nahm, Kee Suk
合成了一种新型的Fe3O4/CNT纳米复合材料，并将其应用于无介体微生物燃料电池(MFC)碳纸负极的改性，以提高其性能。对不同Fe3O4含量的Fe3O4/CNT复合修饰阳极进行了研究，找出了获得最佳MFC性能的纳米复合材料的最佳配比。经Fe3O4/CNT修饰的阳极比未修饰的碳阳极具有更高的功率密度，其中30wt%的Fe3O4/CNT改性阳极的最大功率密度为830 mW/m(2)。在Fe3O4/CNT复合修饰阳极中，Fe3O4通过其磁引力将碳纳米管附着在阳极表面形成多层网络，而碳纳米管为细菌的生长提供了更好的纳米结构环境，并帮助电子从大肠杆菌转移到电极，从而在细菌的催化活性下增加了电流的产生。借助各种结构和电化学技术，详细讨论了它们的电催化行为和所有可能的电催化机理。(C)2014爱思唯尔B.V.保留所有权利。
A novel Fe3O4/CNT nanocomposite was synthesized and employed for the modification of carbon paper anode in a mediator-less microbial fuel cell (MFC) to enhance its performance. The Fe3O4/CNT composite modified anodes with various Fe3O4 contents were investigated to find the optimum ratio of the nanocomposite for the best MFC performance. The Fe3O4/CNT modified anodes produced much higher power densities than unmodified carbon anode and the 30 wt% Fe3O4/CNT modified anode exhibited a maximum power density of 830 mW/m(2). In the Fe3O4/CNT composite modified anode, Fe3O4 helps to attach the CNT on anode surface by its magnetic attraction and forms a multi layered network, whereas CNT offers a better nanostructure environment for bacterial growth and helps electron transfer from E.coli to electrode resulting in the increase in the current production with the catalytic activity of bacteria. The electrocatalytic behavior and all possible mechanism for their better performance are discussed in detail with the help of various structural and electrochemical techniques. (C) 2014 Elsevier B.V. All rights reserved.