活化条件对活性碳纳米管比表面积影响.pdfVIP

物理化学学报(Wuli Huaxue Xuebao) January A cta Phys. Chim. Sin., 2006, 22(1) ：43耀47 43 [Article] /whxb 活化条件对活性碳纳米管比表面积的影响 奇 卢晓英 赵 勇 朱晓彤 蔡玉冬 钱 兰 ( 南交通大学材料科学与工程学院, 材料先进技术教育部重点实验室, 超导研究开发中心, 成都 610031) 摘要 以KOH 为活化剂, 研究了多壁碳纳米管在制备活性碳纳米管过程中四个重要影响因素: 活化剂用量、活 化温度、活化时间和活化过程中保护气体的流速对所得活性碳纳米管BET 比表面积的影响并解释了原因. 研究 表明上述四个因素都会对活性碳纳米管的比表面积产生较大的影响, 其中活化剂用量的影响最大, 在研究范围 2 -1 可引起比表面积增大约241 m ·g . 在这四个影响因素中除活性碳纳米管的比表面积随活化温度的增加而不 断增加外, 其他三个影响因素的变化都会使活性碳纳米管的比表面积出现最大值, 而且四个影响因素的改变, 都 不改变活性碳纳米管的孔洞主要是中孔和大孔的特点. 关键词： 比表面积, 活性碳纳米管, 活化条件 中图分类号： O647, TM53 Effects of Activation Conditions on the Specific Surface Area of Activated Carbon Nanotubes JIANG, Qi LU, Xiao Ying ZHAO, Yong ZHU, Xiao Tong CAI, Yu Dong QIAN, Lan (Key Laboratory of Advanced Technologies of Materials of Ministry of Education of China, Superconductivity R D Center, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China) Abstract The effects of four important factors, including dosage of activating agent, activation temperature, activation time, and flow rate of protecting gas, on the specific surface area of activated carbon nanotubes (ACNTs) using KOH as the activating agent were discussed and the possible reasons were proposed. The results showed that the specific surface area of ACNTs could be greatly affected by modifying the four factors amongst which