聚苯胺修饰阴极对沉积型微生物燃料电池产电性能的影响

Effect of Polyaniline Modified Cathode on Performance of Sediment Microbial Fuel Cells

考察了聚苯胺(PANI)修饰阴极对沉积型微生物燃料电池(SMFC)产电性能和有机质去除率的影响。衰减全反射红外光谱(ATR)表征证明修饰电极表面PANI为导电的质子掺杂状态。电化学阻抗谱(EIS)测试揭示,PANI修饰电极的欧姆内阻(R ohm)和电荷转移内阻(R ct)明显低于空白电极,且随着PANI负载量的增大逐渐减小。以PANI修饰阴极序批式运行沉积型微生物燃料电池(SMFC),可以显著提高SMFC的产电性能以及沉积物中有机质去除率。与空白阴极SMFC体系相比,PANI-110修饰阴极SMFC的最大功率密度增大了64倍,表观内阻减小了12倍,SCOD去除率由12.4%增大到40.3%。

Effect of polyaniline （PANI） modified cathode on the electrogenic capacity and the organic removal efficiency of sediment microbial fuel cell （SMFC） were systematically studied. Attenuated total reflection infrared spectroscopy （ATR） characterization verified that the PANI loaded on cathodes were conductive proton doping state. Electrochemical impedance spectroscopy （EIS） test revealed that ohmic resistance （Roh.） and charge transfer resistance （Re,） of PANI cathodes were obviously smaller than that of blank cathode. Furthermore, Rohm and Rct of PANI cathodes decreased with the increase of PANI loading amount. The PANI-110 cathode SMFC exhibited the highest power density whilst the lowest internal resistance ,which were 64 times higher and 12 times smaller than that of blank cathode SMFC,respectively. Moreover,the organic removal efficiency increased from 12.4% of blank cathode SMFC to 40.3% of PANI cathode SMFC.