Preparation And Research On Fe-C Nanostructured Pellets

Duo to the strong surface area, porosity and high electrical conductivity, the activated carbonfibers and carbon nanotubes become the popular material, which is composited with metal materials.Although the iron-carbon micro-electrolysis technology has many advantages in terms of wastewater,However, because of the limits of the passivation reaction and the traditional activated carbon, it issignificant important to research Fe-C new materials.Fe-C microstructure nanostructures under different experimental conditions are analyzed, and thedegradation efficiency of simulated wastewater by Fe-C nanostructures pellet is studied. Results of thestudy are as follows.The different temperature and proportions of carbon fibers and irons have a great impact on themicrostructure of Fe-C fiber pellets, when the temperature is1200℃, C/Fe is20%, iron particles andcarbon fibers on Fe-C fiber pellets distribute evenly.Pyrolysis temperature and catalyst content have a great influence on the microstructure of carbonnanotubes, which shows the amount, arrangement structure, length of the tube and pipe diameter size.When the temperature is800℃, carbon nanotubes arrange in uniform and have less impurities, thediameter is at30～50nm and length is at5～10μm. Pellets reduction temperature has little effect onthe surface structures of Fe-C nanotube pellets. The combination between carbon Nanotubes andpellet surface is good and iron-carbon particles distribute evenly.2,4–dichlorophenol is removed better by Fe-C fiber pellets and Fe-C nanotubes pellets underacid condition, whose removal rate is low under neutral or basic conditions. As the reaction timeincreases, the removal rate of wastewater improves. Too low or too high C/Fe content in Fe-C fiberpellets is not good for removal rate, when pH is5and the reaction time is3hours. Wastewaterremoval effect is best by Fe-C fiber pellets (C/Fe=20%) and Fe-C nanotube pellets. Removal rate ofthe former is about82%, the latter removal rate is about92%.Figure29; Table15; Reference45...