【摘要】 采用H2O2为氧化剂对碳纳米管表面的疏水性进行改性研究,通过碳纳米管失重率和碳纳米管表面红外光谱分析表征分别考察了H2O2的浓度和氧化时间对改性效果的影响.结果表明:随着H2O2溶液浓度的提高和氧化时间的延长,碳纳米管的失重率呈上升趋势,但碳纳米管表面的亲水基团却是在H2O2溶液浓度为0.45 mol.L-1、氧化时间为2 h时为最多.我们认为碳纳米管表面的氧化过程可以分为三个阶段:碳纳米管表面的侵蚀阶段、亲水基团的引入阶段和分解阶段.碳纳米管表面的氧化过程实际上就是这三个阶段循环往复进行的过程.H2O2能有效地改变碳纳米管表面的疏水性,使其作为催化剂载体使用时发挥更好的功能.更多还原

【Abstract】 H2O2 was used as oxidizer to change hydrophobic of the carbon nanotube surface.The loss ratio of CNTs and IR were used to show the effect of oxidation.The results indicated that,along with the H2O2 solution concentration enhancement and the oxidized time extension,the loss ratio of CNTs was improved.But the hydrophilic group was most introduced into CNTs surface when the H2O2 solution concentration is 0.45 mol·L-1,the oxidized time is 2 h.We thought the oxidation process on CNTs surface might be divided into three stages: CNTs surface being corroded,hydrophilic groups introduced,and decomposd.In fact the oxidation process was a process which these three stages repeat in cycles.H2O2 can change the hydrophobic of the CNTs surface effectively,which makes CNTs used as catalyst support and display a better function.更多还原