PPy/TiO2光催化微生物燃料电池产电及在钴酸锂浸出中的应用

以无水氯化铁为氧化剂，碳纸为基板，通过化学氧化法制备聚吡咯/二氧化钛（PPy/TiO₂）光电阴极，采用XRD、IR、SEM对光催化材料进行表征.以碳纸为阳极；碳纸、TiO₂改性碳纸和PPy/TiO₂改性碳纸为阴极，构建双室微生物燃料电池（MFC）.在光照条件下，研究了MFC废水处理效果、产电性能及阴极钴酸锂的浸出情况.结果表明：PPy/TiO₂改性碳纸最大功率密度为10425.7mW/m²，分别是碳纸和TiO₂改性碳纸的1.97和1.86倍；PPy/TiO₂改性碳纸阴极Co（Ⅱ）浸出率为47.8%，分别是碳纸和TiO₂改性碳纸的1.87和1.76倍.

Electricity generation of PPy/TiO2 photocatalytic microbial fuel cell and its application in the leaching of lithium cobaltate

The Polypyrrole/Titanium dioxide (PPy/TiO₂) photocathode was prepared by chemical oxidation using anhydrous ferric chloride as oxidant and carbon paper as substrate. The photocatalytic materials were characterized by XRD, IR and SEM. A dual-chamber microbial fuel cell (MFC) was constructed with carbon paper as anode and carbon paper, TiO₂ and PPy/TiO₂ modified carbon paper as cathode, respectively. The wastewater treatment efficiency, electricity generating performance and the leaching of lithium cobaltate in the cathode chamber were investigated by using MFCs under light condition. The results showed that the maximum power density of PPy/TiO₂ modified carbon paper was 10425.7mW/m², which was 1.97 and 1.86 times the power density of carbon paper and TiO₂ modified carbon paper respectively, and the cathodic Co(Ⅱ) leaching rate of PPy/TiO₂ modified carbon paper was 47.8%, which was 1.87 and 1.76 times that of carbon paper and TiO₂ modified carbon paper, respectively.