摘要
微生物燃料电池(microbial fuel cell,MFC)是利用电化学技术将微生物代谢能转化为电能并可同时降解废水的一种装置.本文针对目前MFC输出功率密度小、工作效率低等缺点,提出了利用半导体光催化和微生物催化协同作用构建新型MFC体系的设想,即将半导体太阳能电池串入MFC体系,组成"光电池-微生物电池"新型电池体系.实验结果表明,在光照的作用下,新型MFC体系的开路电压、短路电流和最大输出功率密度,与普通MFC体系相比,均有了明显的提高.光电催化作用的引入,有效地改善了MFC体系阴极的接受电子的能力,使阳极提供电子的能力得到最大限度的发挥,既给MFC体系的运转提供了一部分动力,也为MFC体系提高污染物的降解速率提供了基础.此项研究对解决能源危机和环境污染具有重要意义.
Microbial fuel cell （MFC） is a kind of device, which can transform microbial metabolic energy into electric energy and simulta- neously degrade the pollutants in wastewater by electrochemical technologies. Currently, the density of output power and efficiency are low and research of MFC is still in laboratory and in developing stage. In this paper, we design a kind of novel MFC system in which the semiconductor photocatalysis cooperating with the microbial catalysis is used by connecting photovoltaic cells to the traditional MFC systems in series. Thus we achieve a ＂photovoltaic cells-microbial cell＂ new MFC system. Experiments show that open-circuit voltage, short-circuit current and maximum output power density are greatly improved in the novel MFC system when the photovoltaic ceils are exposed to the illumination. Photocatalysis of the semiconductor improves the reaction rate in the cathode chamber and the anode chamber, contributes part of power to runing the novel MFC system, and provides the basis for improving the pollutant degradation rate in wastewater. It is of great significance to solve the problem of energy crisis and environmental pollution.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第24期543-547,共5页
Acta Physica Sinica
基金
国家自然科学基金(批准号:51102003)
教育部博士点基金(批准号:20100001120014)
国家重点基础研究发展计划项目(批准号:2007CB815600)资助的课题~~
关键词
微生物燃料电池
硅太阳能电池
光催化
协同工作体系
microbial fuel cell （MFC）, silicon photovoltaic cells, photocatalysis, system of semiconductor cooper-te with MFC
