To boost the performance of microbial fuel cells (MFCs), a novel material of polypyrrole nanowires (PPy‐NWs) modified by carbon dots (CDs) is synthesized by polymerizing pyrrole monomers and CDs, in which CDs are attached and distributed on the surface of the PPy‐NWs, thus leading to the rough surface with a special dot‐line structure. Such CDs/PPy‐NW composite with special unique structure exhibits superior properties, and excellent performance is found for MFC using CDs/PPy‐NW composite as anode. The electron transfer rate increases to 0.0934 s⁻¹ with a sharp rise by 26% over pure PPy‐NWs, and the resistances of CDs/PPy‐NW electrode are only one third of those of pure PPy‐NWs electrode. Further, the mini‐MFC equipped with the CDs/PPy‐NW composite as anode exhibits a high open circuit voltage (630 mV) and its maximum power density with a value of 291.4 mW m⁻² is twice that of the mini‐MFC equipped with pure PPy‐NWs anode. These results demonstrate CDs/PPy‐NW with a unique dot‐line structure as a more promising anode material for MFC application.

中文翻译：

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用于高性能微型微生物燃料电池的碳点修饰PPy-NW阳极

为了提高微生物燃料电池（MFCs）的性能，通过聚合吡咯单体和CD合成了一种新型的经碳点（CD）改性的聚吡咯纳米线（PPy-NWs）材料，其中CD附着并分布在碳纳米管的表面PPy-NW，从而导致具有特殊点线结构的粗糙表面。这种具有独特独特结构的CD / PPy-NW复合材料表现出优异的性能，并且使用CDs / PPy-NW复合材料作为阳极的MFC具有出色的性能。电子传输速率增加到0.0934 s ^-1与纯PPy-NW电极相比，CDs / PPy-NW电极的电阻急剧上升了26％，而CD / PPy-NW电极的电阻仅为纯PPy-NWs电极的三分之一。此外，配备有CDs / PPy-NW复合材料作为阳极的mini-MFC具有很高的开路电压（630 mV），其最大功率密度为291.4 mW m ^-2，是配备mini-MFC的两倍。使用纯PPy-NWs阳极。这些结果表明，具有独特点状结构的CD / PPy-NW是用于MFC应用的更有希望的阳极材料。