β-FeOOH modified carbon monolith anode derived from wax gourd for microbial fuel cells
β-FeOOH modified carbon monolith anode derived from wax gourd for microbial fuel cells
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用于微生物燃料电池的源自冬瓜的β-FeOOH改性碳整体阳极
DOI：
10.1016/j.ijhydene.2021.11.096
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发表时间：
2021-12
影响因子：
7.2
通讯作者：
Yang Cui
中科院分区：
文献类型：
--
作者：
Xinhua Tang;Lei Liu;Yang Cui
高性能阳极材料的制备对提高微生物燃料电池（MFC）的产电性能具有重要意义。本文以冬瓜为原料，采用冷冻干燥和热解的方法制备了多孔炭块。在WGC上包覆β-FeOOH，进一步提高了阳极的性能（β-FeOOH/WGC）。以WGC和β-FeOOH/WGC为阳极的MFC的最大功率密度分别为913.9和1355.1 mW/m2，远高于对照组（558.2 mW/m2）。WGC具有三维孔结构，含氮、含氧官能团，具有良好的载菌性能。β-FeOOH改性后MFC性能的提高主要归因于两个方面：β-FeOOH提高了MFC的电化学活性，降低了传递阻力; β-FeOOH有利于胞外产电菌的形成。研究表明，β-FeOOH改性炭块阳极的合成为提高MFC的发电性能提供了一条有效途径。
The preparation of high-performance anode materials is of significance for enhanced power generation in microbial fuel cells (MFCs). Herein, porous carbon monolith was prepared by simple freeze drying of wax gourd and subsequent pyrolysis (WGC). β-FeOOH was coated on WGC to further improve the performance of the anode (β-FeOOH/WGC). The maximum power density of the MFCs with WGC and β-FeOOH/WGC anode was 913.9 and 1355.1 mW/m2respectively, which was much higher than that of the control (558.2 mW/m2). WGC possessed three-dimensional pore structure, nitrogen and oxygen-containing functional groups, which endowed it with satisfactory bacterial loading. Improved MFC performance after β-FeOOH modification could be ascribed to two aspects: β-FeOOH enhanced the electrochemical activity and decrease the transfer resistance; β-FeOOH was conducive to exoelectrogens formation. This study demonstrated that the synthesis of β-FeOOH modified carbon monolith anode offered an efficient route to enhance the power generation of MFCs.
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