A miniature microbial fuel cell with conducting nanofibers-based 3D porous biofilm
A miniature microbial fuel cell with conducting nanofibers-based 3D porous biofilm
复制标题
DOI：
10.1088/0960-1317/25/12/125017
复制
发表时间：
2015-12-01
影响因子：
2.3
通讯作者：
Dong, Liang
中科院分区：
文献类型：
--
作者：
Jiang, Huawei;Halverson, Larry J.;Dong, Liang
微型微生物燃料电池（MFC）技术由于其在高通量筛选细菌和突变体以阐明发电机制方面的潜在应用而受到越来越多的关注。本文报道了一种新型微型MFC，它利用电纺丝导电聚（3,4-乙烯二氧噻吩）（PEDOT）纳米纤维作为12 μ l阳极腔内的3D多孔阳极，提高了输出功率密度和启动时间。该装置在不进行细菌培养优化的情况下，以希瓦氏菌MR-1为模型生物催化剂，根据阳极液室的体积得到423 μ W cm(3)的功率密度。该设备的优势还在于开机时间仅为1小时。电纺丝纳米纤维的高导电性使其适合于高效的电子转移。导电纳米纤维的平均孔径为几微米，这有利于细菌在纳米纤维表面的渗透和定植。我们证明了S. oneidensis可以完全定殖在这种纳米纤维基多孔阳极的内部区域。这项工作代表了探索使用电纺PEDOT纳米纤维作为mfc的3D阳极材料的新尝试。所提出的微型MFC有可能提供一种高灵敏度、高通量的工具来筛选适合的细菌种类和突变菌株，用于大型MFC。
Miniature microbial fuel cell (MFC) technology has received growing interest due to its potential applications in high-throughput screening of bacteria and mutants to elucidate mechanisms of electricity generation. This paper reports a novel miniature MFC with an improved output power density and short startup time, utilizing electrospun conducting poly(3,4-ethylenedioxythiophene) (PEDOT) nanofibers as a 3D porous anode within a 12 mu l anolyte chamber. This device results in 423 mu W cm (3) power density based on the volume of the anolyte chamber, using Shewanella oneidensis MR-1 as a model biocatalyst without any optimization of bacterial culture. The device also excels in a startup time of only 1hr. The high conductivity of the electrospun nanofibers makes them suitable for efficient electron transfer. The mean pore size of the conducting nanofibers is several micrometers, which is favorable for bacterial penetration and colonization of surfaces of the nanofibers. We demonstrate that S. oneidensis can fully colonize the interior region of this nanofibers-based porous anode. This work represents a new attempt to explore the use of electrospun PEDOT nanofibers as a 3D anode material for MFCs. The presented miniature MFC potentially will provide a high-sensitivity, high-throughput tool to screen suitable bacterial species and mutant strains for use in large-size MFCs.