PDF(Pubmed)
Abstract：
Carbon felt was used as the anode and WO3/MoS2/FTO (fluorine-doped tin oxide) was used as the photocathode in a photocatalytic microbial fuel cell (PMFC). The photoelectric performance of the WO3/MoS2/FTO photocathode and the removal efficiency of methylene blue (MB) and Cr(VI) mixed pollutants were systematically investigated in the cathode chamber. The results showed that after 12 h of light irradiation in the PMFC with WO3/MoS2/FTO as the photocathode, the removal rates of MB and Cr(VI) were 84.56 and 68.11 %, respectively, which were much higher than those using WO3/FTO as a photocathode (55.57 % and 45.26 %, respectively). The corresponding maximum output power was 33.14 mW/m2, which was 1.85 times that of the WO3/FTO photocathode PMFC. These results can be attributed to the fact that WO3 is an n-type semiconductor and MoS2 is a p-type semiconductor. Analysis of trapping experiments showed that the composite of WO3 and MoS2 formed a Z-scheme heterojunction, which improved the separation efficiency of the photoelectric carriers and enhanced the pollutant removal efficiency of the photocathode. PMFCs are a new and environment-friendly technology for removing pollutants thereby providing an experimental basis for future engineering applications.
摘要：
在光催化微生物燃料电池（PMFC）中，碳毡用作阳极，WO3/MoS2/FTO（掺氟氧化锡）用作光电阴极。在阴极室中系统地研究了WO3/MoS2/FTO光电阴极的光电性能以及对亚甲基蓝(MB)和Cr(VI)混合污染物的去除效率。结果表明,在以WO3/MoS2/FTO为光电阴极的PMFC中光照射12h后,MB和Cr(VI)的去除率分别为84.56和68.11%,分别,远高于使用WO3/FTO作为光电阴极（55.57％和45.26％，分别)。相应的最大输出功率为33.14mW/m2，是WO3/FTO光电阴极PMFC的1.85倍。这些结果可以归因于WO3是n型半导体并且MoS2是p型半导体的事实。俘获实验分析表明，WO3和MoS2的复合材料形成了Z型异质结，提高了光电载流子的分离效率,提高了光电阴极的污染物去除效率。PNFCs是一种新型的环保技术，可用于去除污染物，从而为未来的工程应用提供了实验基础。
