Introduction of Manganese Oxide into Carbon Nanotubes for the Potential Applications as a Contrast Medium  

作　　者：佟钰 

机构地区：[1]School of Materials Science and Engineering,Shenyang Jianzhu University

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第6期1151-1154,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：教育部留学回国人员科研启动基金项目;辽宁省教育厅科学项目计划(L2010446);辽宁省教育厅重点实验室项目(LS2010128)

摘　　要：Manganese compound with evident toxicity is widely employed as the contrast medium for clinicalexaminations such as magnetic resonance imaging(MRI).In the present work,a feasible way with the applica-tion of vacuum impregnation and rotary evaporation was proposed to introduce manganese chloride hydrate intothe inner cavities of template - synthesized carbon nanotubes(CNTs),and then a process of alkali treatmentwas used to liberate the loaded CNTs from the template.It is notable that the alkali attack in the presence ofresidual oxygen also resulted in a series of changes in chemical compositions of guest substances,and the ulti-mate compound of manganese was found to be manganese oxide(Mn3O4) by X-ray diffraction and transmissionelectron microscopy.Determinations of energy dispersive spectrum under scanning electron microscopy showeda high-content filling(more than 50 wt%) of Mn3O4 in the loaded CNTs.This work developed a feasible andconvenient way for the encapsulation of guest substances to reduce bio-toxic effects.Manganese compound with evident toxicity is widely employed as the contrast medium for clinical examinations such as magnetic resonance imaging（MRI） .In the present work,a feasible way with the application of vacuum impregnation and rotary evaporation was proposed to introduce manganese chloride hydrate into the inner cavities of template-synthesized carbon nanotubes（CNTs） ,and then a process of alkali treatment was used to liberate the loaded CNTs from the template.It is notable that the alkali attack in the presence of residual oxygen also resulted in a series of changes in chemical compositions of guest substances,and the ultimate compound of manganese was found to be manganese oxide（Mn3O4） by X-ray diffraction and transmission electron microscopy.Determinations of energy dispersive spectrum under scanning electron microscopy showed a high-content filling（more than 50 wt% ） of Mn3O4 in the loaded CNTs.This work developed a feasible and convenient way for the encapsulation of guest substances to reduce bio-toxic effects.

关 键 词：carbon nanotube(CNT) manganese oxide template synthesis FILLING contrast medium 

分 类 号：TQ127.11[化学工程—无机化工]