Mesoporous carbon has extensive application in many fields,such as second-batteries,supercapacitors,fuel cells,etc.It is the hottest project to obtain mesoporous carbon with certain morphology or components in order to meet particular needs for a long time.The composite of polyaniline and ferroferric oxide was manufactured through polymerization of aniline in suspension of ferroferric oxide with its surface modified by oleic acid.A series of mesoporous carbon was obtained after the composite being carbonized at 500℃,graphitized at the temperature from 800℃ to 1300℃ under nitrogen atmosphere in a tube oven.SEM,TEM,XRD,FT-IR and isothermal desorption apparatus were adopted to characterize as-prepared carbon.Effect of graphitic temperature on morphology and components of the carbon was explored in detail.The research results shown that graphitic temperature of the composite was the key factor to structure and properties of as-obtained carbon.For example,it shown particles possessing irregular shapes,which was with partly graphitic carbon layers,when graphitic temperature was from 800℃ to 1000℃.Some spheres with open mouths,liked bows,were found in samples when the composite being treated at 1200℃.Diameter of the bows was about 600nm.The wall of bows was conformed by graphitic carbon layers,with about 50nm in thickness.Fe3C component was also found in these samples.However,when the graphitic temperature was at 1300℃,only some hollow spheres were found in as-obtained carbon.Diameter of these hollow spheres was about from 1μm to 2μm.Wall of the hollow spheres was about 20nm in thickness,which was formed by highly graphitic carbon-layers.By changing graphitic temperature of the composite,BJH adsorption average pore diameter and BET specific surface area of the mesoporous carbon can be easily adjusted in the range from 5.9nm to 19.9nm,and from 62.6m2/g to 677.8m2/g,respectively.Among all these as-prepared mesoporous carbon,the sample from being graphitized at 800℃ had the best electrochemical performance,whose specific capacitance was 161F/g in 0.5mol/L sulfuric acid aqueous solution,at the scan rate of 5mV/s,tested by cyclic voltammetry technics.
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