铁、镍催化活化杉木屑制备中孔炭与孔结构表征

Preparation and pore structure characterization of mesoporous carbon from Chinese fir dust by iron or nickel metal catalyzed activation method

以杉木屑为原料,经450℃低温炭化制备炭化料基体.采用水热浸渍方法,在炭基体中分别负载铁、镍作为催化活化剂,经二次炭化后制备中孔炭.采用场发射扫描电镜(FSEM)、N_2吸附等温线、亚甲基蓝吸附和碘吸附分别对中孔炭的孔结构特征和吸附性能进行了表征.结果表明:以乙酸镍为催化活化剂制备的中孔炭性能更佳,其总孔容积和平均孔径分别为0.70 mL·g^(-1)和3.09 nm,且样品在2～10 nm之间呈现多处较明显的中孔峰,中孔率高达77%.

Carbon precursor was prepared from Chinese fir dust carbonized at 450℃. Loading with nickel or iron as catalyzing-activation agent on prepared carbon precursor by hydrothermally impregnation, mesoporous carbon was prepared followed by the next carbonization process. The adsorption properties and pore structures of prepared meso- porous carbon were investigated by iodine and methylene blue adsorption experiments, FSEM and nitrogen adsorption analysis, respectively. Results indicated that the addition of nickel acetate as catalyzing-activation agent was recommended to achieve mesoporous carbon with superior properties, and the total volume and average pore diameter of the as-prepared mesoporous carbon were 0.70 mL. g^-1 and 3.09 nm, respectively. At the same time, mesopores with the size range between 2 nm and 10 nm were remarkably observed resulting in the high mesoporosity ratio of 77%.