Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China.
Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
Bioresour Technol. 2019 Sep;288:121499. doi: 10.1016/j.biortech.2019.121499. Epub 2019 May 17.
Electrode modifications with conductive and nanostructured polyaniline (PANI) were recognized as efficient approach to improve interaction between electrode surface and electrogenic bacteria for boosting the performance of microbial fuel cell (MFC). However, it still showed undesirable performance because of the challenge to control the orientation (such as vertical alignment) of PANI nanostructure for extracellular electron transfer (EET). In this work, vertically aligned polyaniline (VA-PANI) on carbon cloth electrode surface were prepared by in-situ polymerization method (simply tuning the ratio of tartaric acid (TA) dopant). Impressively, the VA-PANI greatly improved the EET due to the increased opportunity to connect with conductive proteins. Eventually, MFC equipped with the VA-PANI electrodes delivered a power output of 853 mW/m, which greatly outperformed those electrodes modified with un-oriented PANI. This work provided the possibility to control the orientation of PANI for EET and promise to harvest energy from wastewater with MFC.
电极的导电和纳米结构聚苯胺 (PANI) 修饰被认为是改善电极表面与产电细菌相互作用的有效方法，可提高微生物燃料电池 (MFC) 的性能。然而，由于难以控制 PANI 纳米结构的取向（如垂直排列）以促进细胞外电子传递 (EET)，其性能仍不理想。在这项工作中，通过原位聚合方法（简单调节酒石酸 (TA) 掺杂剂的比例）在碳布电极表面制备了垂直排列的聚苯胺 (VA-PANI)。令人印象深刻的是，VA-PANI 极大地提高了 EET，因为它增加了与导电蛋白连接的机会。最终，配备 VA-PANI 电极的 MFC 输出功率为 853 mW/m，远高于那些用无定向 PANI 修饰的电极。这项工作为控制 PANI 的取向以促进 EET 提供了可能性，并有望利用 MFC 从废水中获取能源。
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