重铬酸钾用于碳纳米管开口及表面处理的研究  

Study on the Opening and Surface Treatment of CNTs with K_2Cr_2O_7

作　　者：王敏炜[1] 姚彦红[1] 查少华[1] 蒋柏泉[1] 

机构地区：[1]南昌大学环境科学与工程学院,江西南昌330029

出　　处：《南昌大学学报（工科版）》2006年第1期1-3,11,共4页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(20263003);江西省科技攻关项目

摘　　要：用重铬酸钾作为氧化剂对碳纳米管进行开口及表面的氧化处理,采用失重率显示氧化效果并通过TEM观察碳纳米管.结果显示:重铬酸钾的浓度、氧化温度、氧化时间对碳纳米管的氧化效果均产生影响,其中以氧化温度的影响最大;重铬酸钾氧化碳纳米管时先是浸蚀碳纳米管表面,使碳纳米管管壁变薄,继而攻击碳纳米管的弯曲处,造成碳纳米管断裂,溶液中的金属离子进入碳纳米管的空腔内,氧化继续进行则可在碳纳米管外表面产生亲水基团,从而有利于金属颗粒的负着.CNTs was opened,and treated the surface by K2Cr2O7. The loss ratio of CNTs was used to show the effect of oxidation and the morphologies of CNTs was observed by TEM. The results showed that the concentration of K2Cr2O7, oxidation temperature and oxidation time all affected the oxidation results. Among these three factors,oxidation temperature produced the largest effect;As the CNTs was oxidized by K2Cr2O7 ,the wall of CNTs was corroded firstly and made the wall of CNTs thinner,then the curved - site of CNTs was attacked by oxidant and made the CNTs break in several section. So the metal ion existing in solution would enter into the cavity of CNTs. Hydrophilic groups would be introduced in the surface of CNTs with the oxidation reaction continuing. It would be good to the adherence of metal particles.

关 键 词：重铬酸钾 碳纳米管 氧化 表面处理 

分 类 号：O647.11[理学—物理化学]