School of Environmental Science and Engineering, Academy of Ecology and Environment, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, PR China.
School of Environmental and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, P.R. China.
Sci Total Environ. 2022 Mar 1;810:151314. doi: 10.1016/j.scitotenv.2021.151314. Epub 2021 Oct 29.
In microbial fuel cells (MFCs), the anode electrode is a core structure as the catalytic area of exoelectrogens. The anode material for large-scale MFCs needs excellent bioelectrochemical performance and low fabrication costs. Herein, carbonized phenolic foam with controllable porous structures was developed as the bio-capacitor of MFCs. The proportion of sodium dodecylbenzene sulfonate (SDBS), which improved mixing and dissolution between the resin liquid and the foaming agent, was adjusted to form open pores on the foam film and skeletons, which promoted both the capacitance and biocompatibility of the anode. Within SDBS proportion from 0 to 1.2 wt%, the anode SPF-9 (0.9 wt%) obtained the best capacitance (37 ± 0.13 F g), electrochemical active surface area (87 ± 0.38 cm) and hydrophilia (contact angle 79 ± 0.2°). The MFCs with SPF-9 obtained the highest power density of 3980 ± 178 mW m, while those of carbon-cloth anodes were 1600 ± 28 mW m. The biofilm of SPF-9 also demonstrated higher activity and obtained larger abundance of exoelectrogens (68 ± 0.38%). The increased capacitance and biocompatibility mainly resulted in the good performance of SPF-9. The carbonized phenolic foam anode material was worth considering for the future application of MFCs due to its superior electrochemical performance and large-quantity fabrication capability.
在微生物燃料电池 (MFC) 中，阳极电极是作为外电子体催化区域的核心结构。用于大规模 MFC 的阳极材料需要具有优异的生物电化学性能和低廉的制造成本。本文中，开发了具有可控多孔结构的碳化酚醛泡沫作为 MFC 的生物电容器。通过调整提高树脂液体和发泡剂之间混合和溶解能力的十二烷基苯磺酸钠 (SDBS) 的比例，在泡沫薄膜和骨架上形成开孔，从而提高了阳极的电容和生物相容性。在 SDBS 比例从 0 增加到 1.2wt%范围内，获得电容 (37 ± 0.13 F g)、电化学活性表面积 (87 ± 0.38 cm) 和润湿性 (接触角 79 ± 0.2°) 最佳的阳极 SPF-9(0.9wt%)。具有 SPF-9 的 MFC 获得了最高的功率密度 3980 ± 178 mW m，而碳布阳极的功率密度为 1600 ± 28 mW m。SPF-9 的生物膜也表现出更高的活性，获得了更大丰度的外电子体 (68 ± 0.38%)。电容和生物相容性的增加主要导致了 SPF-9 的优异性能。由于其出色的电化学性能和大量制造能力，碳化酚醛泡沫阳极材料值得考虑用于未来的 MFC 应用。
