AC-GO空气阴极对微生物燃料电池产电性能的影响

Effect of activated carbon-graphene oxide cathode on performance of microbial fuel cell

考察了氧化石墨烯(GO)修饰活性炭(AC)空气阴极(AC-GO阴极)对微生物燃料电池(MFC)产电性能以及有机物去除率的影响。实验结果表明,向AC阴极中掺杂一定量的GO可以降低阴极的内阻,提高阴极电化学反应速率。其中,GO掺杂量为0.5 mg·cm-2的AC-GO0.05阴极性能最好,该AC-GO0.05阴极MFC体系的最大功率密度(Pmax)为767 m W·m-2,是空白AC阴极体系Pmax(459 m W·m-2)的1.7倍,化学需氧量(COD)去除率和库伦效率(CE)均明显高于空白AC阴极体系。

The effect of a graphene oxide（ GO）-modified activated carbon（ AC） cathode（ AC-GO） on the performance and organics removal efficiency of a microbial fuel cell（ MFC） was investigated. Based on the results,doping moderate amounts of GO into an AC air-cathode reduced the internal resistance of the cathode and accelerated the cathodic reaction rate. The AC-GO0. 05 cathode outperformed the other AC-GO cathodes and the blank AC cathode. The maximum output power density（ Pmax） of the MFC with the AC-GO0. 05 cathode was 767 m W·m- 2,which is 1. 7 times higher than that of the MFC with the blank AC cathode. Meanwhile,both the COD removal efficiency and the coulomb efficiency（ CE） of the MFC with the AC-GO0. 05 cathode were higher than those of the MFC with the blank AC cathode.