The CMK-3-130 exhibits the largest adsorption capacity than CMK-3-100 and CMK-3-150.Mesoporous carbon sieves were prepared from SBA-15 materials at different temperatures.This allows the synthesis of mesoporous carbons sieves with pore dismeters in the range from 3.7 nm(CMK-3-100) to 6.3 nm(CMK-3-150).The mesoporous carbons sieves were studied in the adsorption of VB_12 from water solutions.The maximal adsorption capacity of 412.5 mg/g was found for CMK-3-130,which is probably a consequence of its highly or...