The Synergistic Effect On The Cathode Loaded With Natural Molybdenum And TiO₂ In Microbial Fuel Cell

As a clean energy device,Microbial fuel cell?MFC?converts chemical energy from discarded organic compound into electricity.But the main problem of that are electrical properties are poor and the wastewater treatment capacity is not strong.Two-dimensional material MoS₂,which has energy band gap,large specific surface area and active site,is arose wide concern in the field of light and electricity.The MoS₂nanosheets,which extracted from natural molybdenum ores,can modify MFC cathode to improve the performance and accelerate removal speed of Cr???solution.At the same time,the usage of MoS₂ nanosheets can modify TiO₂ due to the performance of responding to visible light so that the advantages of both can be fully utilized.The main contents are as follows:1.The MoS₂ nanosheet,which stripped out of the natural molybdenum ores,modified on the MFC cathode.Under the light conditions,the maximum power density of the MFC modify by the MoS₂ nanosheet can reach to 73.41mW/m²,which is 1.8 times higher than the blank without light condition;And the internal resistance also decrease 61.99?in the same condition.The electrochemical measurement of MoS₂ nanosheets is performed by linear sweep voltammetry.2.The Cr???simulated wastewater is treated by MFC and the experimental conditions were discussed.After 14 hours treatment,the removal efficiency of the MoS₂ nanosheet-modified MFC in the light is13%higher than that of the blank without light.And the experiment also demonstrated that when the p H is 2 and the initial concentration is 20mg/L,MFC had the best removal efficiency.The kinetics analysis of Cr???simulate wastewater with MFC at different initial concentrations is also performed.3.First,loaded the Mo S₂ nanosheets on TiO₂.Then the experiment will test the TiO₂-loaded-nanosheets'characterization analysis and photoconductivity.The loaded material is modified on the MFC cathode and the maximum power density is 115.22 mW/m²,which is three times that of the non-light blank,catalyzed by 20%?wt?MoS₂/TiO₂ under light irradiation.The internal resistance is 64.07?which decreased 113.73?than the condition of light graphite blank.