Bifunctional quaternary ammonium compounds to inhibit biofilm growth and enhance performance for activated carbon air-cathode in microbial fuel cells
Bifunctional quaternary ammonium compounds to inhibit biofilm growth and enhance performance for activated carbon air-cathode in microbial fuel cells
复制标题
双功能季铵化合物抑制生物膜生长并提高微生物燃料电池活性炭空气阴极的性能
DOI：
10.1016/j.jpowsour.2014.09.008
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发表时间：
2014-12-25
影响因子：
9.2
通讯作者：
Wang, Xin
中科院分区：
文献类型：
--
作者：
Li, Nan;Liu, Yinan;Wang, Xin
羟基从催化剂层中缓慢扩散以及阴极表面的生物污垢是影响无膜空气阴极微生物燃料电池（MFC）功率的两个问题。为了同时解决这两个问题，这里我们简单地使用双功能季铵化合物（QAC）通过强制蒸发对活性炭空气阴极进行改性。在无缓冲介质（0.5 g L-1 NaCl）中，最大功率密度达到1041 +/- 12 mW m(-2)，比对照高17%，这可能是由于催化剂层中阴离子传输的加速。 2个月后，蛋白质含量降低了26倍，功率密度增加了33%，表明QAC改性可以有效抑制阴极生物膜的生长，提高性能的稳定性。添加NaOH和QAC环氧树脂会堵塞催化剂层的孔隙，从而对发电产生负面影响。 (C) 2014 Elsevier B.V. 保留所有权利。
The slow diffusion of hydroxyl out of the catalyst layer as well as the biofouling on the surface of cathode are two problems affecting power for membrane-less air-cathode microbial fuel cells (MFCs). In order to solve both of them simultaneously, here we simply modify activated carbon air-cathode using a bifunctional quaternary ammonium compound (QAC) by forced evaporation. The maximum power density reaches 1041 +/- 12 mW m(-2) in an unbuffered medium (0.5 g L-1 NaCl), which is 17% higher than the control, probably due to the accelerated anion transport in the catalyst layer. After 2 months, the protein content reduced by a factor of 26 and the power density increases by 33%, indicating that the QAC modification can effectively inhibit the growth of cathodic biofilm and improve the stability of performance. The addition of NaOH and QAC epoxy have a negative effect on power production due to the clogging of pores in catalyst layer. (C) 2014 Elsevier B.V. All rights reserved.