| 微生物燃料电池耦合BiVO4光电催化作用降解污染物 |
| Contaminants Removal by BiVO4 Photocatalyst in PEC-MFC Coupling System |
|
| 摘要: 利用水热合成方法制备单斜晶型光催化剂BiVO4,首次将BiVO4引入MFC中,构建全新的PEC-MFC,EC-MFC耦合体系,并研究其对氨氮与染料废水的降解效果及能量消耗。PEC-MFC与EC-MFC耦合体系2h内均能对RhB达到95%以上的降解率;在中性偏酸条件下,可提高耦合体系对NH4+-N的降解效果,且O2是耦合体系的主要决定因素;PEC-MFC和EC-MFC的单位电能消耗量为0.895和0kWh·m-3,在最优条件下,PEC-MFC最大输出电压为0.476V,最大输出功率为755.25mW·m-2。研究了叔丁醇、KI对耦合体系的影响以探究耦合体系的主要氧化物种,阐述了光催化-微生物燃料电池的耦合机理。 |
| 关键词: 微生物燃料电池 光电催化 污染物降解 |
| 基金项目: 国家自然科学基金(No.21177018)资助项目。 |
| Abstract: BiVO4 was successfully synthesized via hydrothermal method, and was introduced into brand-new coupled PEC-MFCand EC-MFCsystem. The efficiency of BiVO4/PEC-MFCsystem in removing NH4+-Nand RhBas the model pollutant, and the energy consumption were studied. Both in the PEC-MFCsystem and EC-MFCsystem with visible light illumination, 95% of RhBcan be removed in120 min. The results demonstrate that the PEC-MFCsystem shows higher efficiency in converting NH4+-Nin weak acidic condition, and oxygen is the decisive factor in the coupling system. The electrical energy per order of PEC-MFCand EC-MFCsystem are 0.895 and 0 kWh·m-3, respectively. The maximum cell voltage 0.427 Vand power density 755.25 mW·m-2 can be achieved in the coupled bio-electrochemical and photo-electro-catalytic reactor. The effect of TBA(tetra butyl alcohol) and KIon the PC, PEC-MFCand EC-MFCsystem was studied for exploring the main oxidative species and pathways (highly active ·OH, ·O2-), and for elucidating the coupling mechanisms in PEC-MFC. |
| Keywords: microbial fuel cell photoelectrocatalysis contaminants removal |
| 投稿时间：2016-01-22 修订日期：2016-04-20 |
| 摘要点击次数: 1700 |
| 全文下载次数: 1757 |
| 李芸,柳丽芬.微生物燃料电池耦合BiVO4光电催化作用降解污染物[J].无机化学学报,2016,32(6):1055-1062. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
