Long-term effect of carbon nanotubes on electrochemical properties and microbial community of electrochemically active biofilms in microbial fuel cells
Long-term effect of carbon nanotubes on electrochemical properties and microbial community of electrochemically active biofilms in microbial fuel cells
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碳纳米管对微生物燃料电池电化学活性生物膜的电化学性能和微生物群落的长期影响
DOI：
10.1016/j.ijhydene.2018.06.144
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发表时间：
2018-08
影响因子：
7.2
通讯作者：
Sun Jian
中科院分区：
文献类型：
--
作者：
Zhang Yaping;Chen Xi;Yuan Yong;Lu Xingwen;Yang Zuoyi;Wang Yujie;Sun Jian
碳纳米管（CNT）已被广泛用于改善阳极性能，但需要有关其长期稳定性的信息以进行改进。在此，我们制备了一种新的碳纳米管改性石墨毡（CNTs-GF）通过一个简单的和可扩展的过程，并评估其长期性能使用厌氧污泥接种。具有CNTs-GF的MFC产生了持续的功率输出增强，从1个月后的1.93 ± 0.09 W m-2增加到3个月后的2.10 ± 0.05 W m-2，并在13个月后达到2.00 ± 0.10 W m-2，表明CNT的发电增强在一年内没有下降。然而，裸GF在13个月内表现出下降的趋势。CNTs-GF的加入有利于电化学活性生物膜（EABs）的生长，并能更好地与EABs相互作用，促进细胞外电子传递。群落分析表明，碳纳米管改性后，土壤细菌数量增加。这些结果表明，CNT改性可以维持MFC性能的上级长期增强。
Carbon nanotubes (CNTs) have been widely exploited to improve anodic performance, but information is needed on their long-term stability for improvement. Herein, we prepared a novel CNTs-modified graphite felt (CNTs-GF) by a simple and scalable process and evaluated its long-term performance using anaerobic sludge as inoculum. the MFC with CNTs-GF yielded a sustained enhancement of power output, increasing from 1.93 ± 0.09 W m−2after 1 month to 2.10 ± 0.05 W m−2after 3 months and reaching 2.00 ± 0.10 W m−2after 13 month, indicating the enhancement in electricity generation by the CNTs was not declined over one year. However, the bare GF showed a declining tendency of performance during 13 months. The long-term enhancement can be explained by the facts that the CNTs-GF was beneficial to electrochemically active biofilms (EABs) growth and interacted better with EABs and increased the extracellular electron transfer. Community analysis showed an increase inGeobacterin response to CNTs modification. These results demonstrated that CNTs modification could sustain a superior long-term enhancement in MFC performance.
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