An ordered hexagonal pore sub-mesostructured silica was synthesized via ionic liquid 1-hexadecane-3-methylimidazolium bromide(C16MIB) as structure-directing agents in acidic media.By combining the results of transmision electron microscopy,X-ray diffraction and surface area measurements,an elementary structure and characterization of the samples was obtained.This material performs two-dimensional hexagonal framework structure being analogous to MCM-41 and SBA-3 silicas in long range order,but the position of reflection peaks of X-ray diffraction shifts to a wide angle compared with those of MCM-41 and SBA-3.The sub-mesostructured silica has high BET specific surface area of 1360 m2/g,as well as small pore size of 1.8 nm.
