微生物燃料电池是一种能把污水中有机物蕴含的化学能直接转换成电能的装置。目前,相对低的输出功率密度限制了它的应用。开发高性能的阳极材料是解决途径之一。基于生物质秸秆利用Hummers氧化法结合抗坏血酸还原法制备了活化三维多孔碳阳极,用扫描电子显微镜观察了所制备的材料的形貌、发现活化过程可以产生许多大小不一的孔结构,可有效帮助传质扩散。交流阻抗谱、循环伏安测试表明,活化可以大大提高三维多孔碳的电化学性能,基于活化三维多孔碳3DPC阳极所制备的微生物燃料电池(MFCs),最大功率密度可达到1184.5W/m3,远远高于改性前(774.8W/m3)。此研究为构筑新型三维碳基阳极提供了新思路和新方法。
Microbial fuel cells(MFCs) are a device that can directly transfer chemistry energy from wastewater to electricity energy.Presently,relatively low power density limited its applications.One solution is to develop high performance anode materials.An advanced actived three-dimensional porous carbon(3DPC) anode was obtained by hummers oxidiation combined with ascorbic acid reduction based on biomass straws.The morphology of the 3DPC was observed using scanning electron microscope(SEM).It was found that the activation process can produce many pore structures of different sizes,which can facilitate mass transfer and diffusion.An improvement of the electrochemical properties can be observed in the electrochemical impedance spectroscopy(EIS),cyclic voltammetry(CV) tests.The microbial fuel cells based on the actived 3DPC exhibited a highest power density of 1184.5W/m3,which is much higher anode than that of pristine 3DPC-MFCs(774.8W/m3).This study provided new ideas and methods for the construction of novel carbon-based 3D anode materials.
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基金资助
国家自然科学基金(21775022);广东省自然科学基金(2017A030310603);广东省普通高校青年创新人才项目(自然科学)(2016KQNCX221);广东省普通高校创新团队项目(2015KCXTD029和2016KCXTD023));广东省普通高校特色创新项目(自然科学)(2015KTSCX179);广东大学生科技创新培育专项资金项目(pdjhb0640);东莞市社会科技发展项目(2017507151062);东莞理工学院城市学院重大科研培育项目(2017YZD003Z);东莞理工学院城市学院青年教师发展基金项目(2016QJZ002Z)
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