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Nano - ceria particles caused great concern of scholars at home and abroad for its unique nature of light, sound, electrical , magnetic , thermal , catalytic , catalysts , superconductors, ceramics , oxygen sensors , solid oxide fuel cell electrolyte , glass polishing materials and electrode materials and other fields are widely used . In this paper, the sol-gel method nano - ceria particles , and used to modify the microbial fuel cell ( MFC ) anode to improve the performance of MFC power . Research and experimental results are as follows: ( 1) Select cerous nitrate , citric acid as a precursor , polyethylene glycol 2000 ( PEG2000 ) as a dispersant, PEG2000 added in an amount by the regulation of the solution pH value , and the firing atmosphere , the sol the gel prepared nano cerium oxide . And using TG - DTA , XRD , TEM precursor and product were characterized. Derived optimal preparation conditions : cerium nitrate and citric acid molar ratio of 1:3 , the amount of water to 20mL , add non-ionic active agents PEG2000 concentration of 0.6 % , the reaction temperature is 65 ° C , do not adjust the citric acid solution the pH value of the gel drying temperature of 105 ° C under an air atmosphere for 500 ° C calcined 2h . ( 2 ) carbon cloth electrode load ceria particles prepared using the sol impregnation method and a solution impregnation method and the sol dipping method modified electrode electrochemical characterization , the modified electrode can promote certain substances in the anode liquid the redox reaction , but when joining the microorganism may overwrite a redox reaction active sites , leading to catalytic VALID . Electrodes ( 3) , respectively, were prepared using the sol impregnation method , and the solution impregnation method as MFC anode , compare with the blank carbon cloth electrode , the sol prepared by impregnation of an anode having a catalytic role to improve the efficiency of electricity production ( maximum power density of 2.19W / m2, is greater than the maximum power density control MFC 1.81W/m2 ) ; impregnated with a solution prepared by the anode is on the production of the electrical properties of inhibition ( maximum power density of about 1.28 W/m2 less than the maximum power density control MFC 2.07 W/m2).
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