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標題: Surface Activation and Modification on Multi-wall Carbon Nanotubes (MWCNTs)
作者: 林桂香
Lin, Hsiang-Kuei
關鍵字: Carbon nanotubes (CNTs);奈米碳管;the BET specific surface area;purified CNTs;Activated CNTs;奈米碳管BET比表面積;純化之奈米碳管;活化之奈米碳管
出版社: 化學工程學系所
Carbon nanotubes (CNTs) have attracted a wide research interest since they were discovered by Iijima in 1991. Because of their special characteristics, such as one-dimensional nano-scale hollow cores, high surface areas, excellent mechanical properties, and good chemical stability, CNTs are possessed potential applications such as the composites, catalyst supports, field emitters, supercapacitor electrodes, heterojunctions and probes of CNTs.
Although many methods have been used to prepare CNTs, the BET specific surface area the CNTs without treatments are not very large (the typical value is about 200 m2/g). In order to enlarge the BET specific surface area of the CNTs, the raw CNTs were prepared with KOH as the activating agent. The CNTs after activation treatment were possessed a larger specific surface area and shown a better performance than those of the pristine CNTs. For example, in the applications of electrochemical supercapacitor electrodes, the electrochemical capacitance of the activated CNTs is twice as large as that of the pristine CNTs. In this study, we have investigated the effects on the larger BET specific surface areas of activated CNTs by the chemical preparation and modification.

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