A STUDY OF PREPARATION OF IRON-CONTAINING CARBON NANOMATERIALS

A carbonaceous gel in acidic media was formed from the oxidation of coal tar pitch, dissolution in alkaline solution and flocculation with HCl. Iron containing carbon nanomaterials were prepared through the carbonaceous sol gel containing iron salt association with supercritical drying. The effects of the ratio of aqua mesophase pitch to iron nitrate and heat treatment on the structures of the iron containing carbon nanomaterials were investigated using FTIR, TEM, physical adsorption, ICP AES, X ray diffraction and TG. The results indicate that Fe/C nanomaterials with different Fe contents can be prepared using this method. After HTT at 500?℃, iron in Fe/C nanomaterial exists as Fe 2O 3, after HTT at 900?℃ it is reduced to elemental iron, and after HTT at 1?300?℃, it reacts with carbon to form Fe 3C and graphitization of the carbon is observed. Under H 2 flow, Fe 2O 3 is reduced to elemental iron when the heat treatment temperature is increased to the range of 300?℃～?500?℃.