For the samples, nitrogen adsorption and desorption isotherms were obtained for the samples re-activated at temperatures of 700◦C;800◦C;900◦C and 1000◦CwithNaOH.InFig.1,thesteepisothermsatthelow relative pressure indicate that all samples except AC1000 have plenty of micropores with a narrow pore size distributions. And as the re-activating temperature increases, theadsorbedvolumealsoincreasestill800◦C.Butat900◦C and 1000◦C, the adsorbed volume decreases. Furthermore development of mesoporosity is indicated by the desorption hysteresis loops of samples.