Melamine modified carbon felts anode with enhanced electrogenesis capacity toward microbial fuel cells

详细信息    查看全文

• 作者：Yang'en Xie^a ; Zhaokun Ma^a ; ^{mazk@mail.buct.edu.cn} ; Huaihe Song^a ; Zachary A. Stoll^b ; Pei Xu^b
• 关键词：Microbial fuel cells ; Anode materials ; Carbon felts ; Modification ; Melamine
• 刊名：Journal of Energy Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：26
• 期：1
• 页码：81-86
• 全文大小：1303 K
• 卷排序：26

文摘

Surface electropositivity and low internal resistance are important factors to improve the anode performance in microbial fuel cells (MFCs). Nitrogen doping is an effective way for the modification of traditional carbon materials. In this work, heat treatment and melamine were used to modify carbon felts to enhance electrogenesis capacity of MFCs. The modified carbon felts were characterized using X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), atomic force microscopy (AFM) and malvern zeta potentiometer. Results show that the maximum power densities under heat treatment increase from 276.1 to 423.4 mW/m2 (700 °C) and 461.5 mW/m2 (1200 °C) and further increase to 472.5 mW/m2 (700 °C) and 515.4 mW/m2 (1200 °C) with the co-carbonization modification of melamine. The heat treatment reduces the material resistivity, improves the zeta potential which is beneficial to microbial adsorption and electron transfer. The addition of melamine leads to the higher content of surface pyridinic and quaternary nitrogen and higher zeta potential. It is related to higher MFCs performance. Generally, the melamine modification at high temperature increases the feasibility of carbon felt as MFCs's anode materials.