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OALib Journal期刊
ISSN: 2333-9721
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微生物燃料电池还原二氧化铅及产电研究
DOI: 10.3724/SP.J.1145.2012.00780, PP. 780-784
Keywords: 钛基二氧化铅,微生物燃料电池,电沉积,生物电,还原
Abstract:
为探究二氧化铅在微生物燃料电池（microbialfuelcell，简称mfc）中的还原及对产电性能的影响，采用电沉积法成功制备了钛基二氧化铅（pbo2/ti），并将其作为阴极材料应用于双室mfc.二氧化铅的价态、晶型、形态特征以及电化学特性分别采用x射线光电子能谱（xps）、x射线衍射光谱（xrd）、扫描电子显微镜（sem）和循环伏安扫描（cv）进行分析，mfc的产电能力通过cod的去除、输出电压和极化曲线进行表征.结果显示，在以pbo2/ti为阴极的mfc中cod的降解率可以达到87.68%，明显高于纯钛板的对照（71.4%）.当外阻为1000ω时，最大输出电压达到760mv，约为对照的30倍.最大功率密度达379mwm？2，相应的电流密度为1185mam？2.同时，pbo2被还原为pbo和pb3(po4)2.由此可见，二氧化铅由于其具有的强氧化性可作为廉价高效的阴极材料应用于mfc，从而大大提高mfc产电能力.图7参28
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