Carbon microspheres (CMSs) were first oxidized with a mixture of concentrated H2O2 and HNO3
and alkali treatment onto the CMSs surface was perfomed by ionization with NaOH solution.The morphologies of all samples were characterized with field emission scanning electron microscopy and elemental analysis.The dispersibility of CMSs before and after modification in different solvents was studied.The results showed that the products were of rough surface and CMSs-(COONa)n ionic compound was formed after acid-and-alkali treatment.Their stability gradually changed from nonreactivity to hydrophilicity; but the properties of CMSs treated simply by NaOH without acid oxidation treatment 〖JP2〗were hardly improved and the products were hardly dispersed in organic solvents as a result of good ionization.