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测定了3种植物基活性炭材料:椰壳活性炭 (CAC4)、剑麻茎基活性炭 (SSAC) 和剑麻基活性碳纤维 (SACF) 的氮吸附等温线,并用不同的理论方法对其孔结构进行了分析和表征。结果表明:CAC4为微孔型,孔径分布集中且大部分是0.7nm以下的极微孔;在相同条件下制备的SSAC和SACF孔分布较为相似,都呈多分散性,结构中除微孔外,还含有丰富的中孔,中孔率均超过50%以上。两者相比,SACF的中孔量和平均孔径更大。3个样品的形态特征和孔结构虽然不同,但其吸附过程都可以用微孔多段填充机理来解析。
The nitrogen adsorption isotherms of three kinds of plant-based activated carbon (CAC4), sisal-based activated carbon (SSAC) and sisal-based activated carbon fiber (SACF) were measured and their pore structures were determined by different theoretical methods Analysis and characterization. The results showed that: CAC4 microporous, pore size distribution is concentrated and most of them are below 0.7nm microporous; SSAC and SACF prepared under the same conditions were more similar pore distribution, were polydisperse, in addition to microporous structure , But also rich in mesopores, mesoporosity more than 50%. The SACF has a larger mesopore volume and larger average pore size than both. Although the morphological characteristics and pore structure of the three samples are different, the adsorption process can be analyzed by multi-pore microporous filling mechanism.