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arXiv 0708.1852cond-mat.mtrl-sci
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立方炭的合成、表征及应用

Synthesis, characterization, and application of carbon cubes

K. -S. Lin, Ruey-Bing Li, Frank Lee, Li-Cheng Lou, Su-Wei Chiu

摘要:

碳纳米管(CNTs)由于其独特的结构、力学和电学性能而受到越来越多的关注。碳纳米管的表面化学改性对于调控碳纳米管的吸附性能和开发其环境应用潜力也是非常重要的。因此,本研究的主要目的是探索多壁碳纳米管(MWCNTs)的最佳合成方法或性能鉴定,以及碳纳米管吸附去除铅离子的环境应用。实验中,采用还原性金属钾催化六氯苯热还原反应,在Co/Ni催化剂前驱体存在下,于503-623 K反应8 ~ 12 h,得到了壁石墨化程度良好的MWCNTs,TEM照片显示MWCNTs的直径在30-100 nm之间。此外,通过EDS、XRPD、XANES和EXAFS等方法对碳纳米管和钴镍前驱体的精细结构和表面化学修饰进行了表征。1.

英文摘要:

Carbon nanotubes (CNTs) have attracted increasing attention because of their unique structural, mechanical, and electronic properties. Surface chemistry modifications are also useful and critical to manipulate the adsorptive properties of CNTs and develop their potential of environmental application. Therefore, the main objectives of this study were to investigate the optimal synthesis methods or characteristics identification of multiwall CNTs (MWCNTs) and the environmental application of lead ions adsorptive removal by CNTs. Experimentally, the MWCNTs of well-graphited walls were obtained with reductive potassium metals of catalytic hexachlorobenzene-thermal routes in the presence of Co/Ni catalyst precursors at 503-623 K for 8- 12 hr. The diameters of MWCNTs ranged of 30-100 nm by TEM microphotos. In addition, fine structures or surface chemical modification of MWCNTs or Co/Ni precursors were further identified by EDS, XRPD, X-ray absorption near edge structural (XANES) or extended Xray absorption fine structural (EXAFS) spectroscopy. 1.

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