采用原位合成和化学共沉积相结合的方法制备了 Cr/Cu 复合粉体催化剂,并将其用于碳纳米管的制备。利用 XRD、SEM 和 TEM 手段分别对其晶相、微观结构形态进行表征。研究表明,Cr 含量对最终产物 CNTs 的结构有明显影响,10％(质量分数)Cr复合催化剂催化效果最好；不同煅烧温度下所得催化剂存在差异,其中700℃煅烧条件下可制备出结晶良好的 Cr/Cu 纳米复合催化剂。不同生长温度下所得复合粉体催化合成的碳纳米管品质形貌不一,其中800℃条件下可得到纯度高、表面光滑的碳纳米管。
Cr/Cu composite powder catalyst was prepared via a combination of in situ synthesis and chemical co-deposition (CVD),and was applied to the synthesis of carbon nanotubes.Techniques of X-ray diffraction (XRD),as well as scanning electron microscopy (SEM)and transmission electron microscope (TEM)had been employed to characterize the crystal phase,micro structural morphologies of the as-synthesized materials,re-spectively.The results show that the content of Cr had a significant effect on the structure of CNTs,and the catalyst with 10wt% Cr was best.There are differences among materials calcined at different temperature, among which well-crystallized Cr/Cu nano-composite catalyst can be produced by calcined the precursor at 700℃.The quality and morphology of carbon nanotubes synthesized by different Cr/Cu composites calcined at vari-ous temperatures have great differences,and CNTs with high purity and smooth surface can be obtained when the catalyst at 800 ℃.
参考文献
| [1] | Iijima S .Helical microtubules of graphitic carbon[J].Na-ture,1991,354(6348):56-58. |
| [2] | Young H L;Scong G K;David T .Catalytic growth of singlewall carbon nano-tubes[J].Physical Review Letters,1997,78:2393. |
| [3] | Wong EW. Sheehan PE. Lieber CM. .NANOBEAM MECHANICS - ELASTICITY, STRENGTH, AND TOUGHNESS OF NANORODS AND NANOTUBES[J].Science,1997(5334):1971-1975. |
| [4] | Salvetat J.-P.;Thomson N.H.;Kulik A.J.;Forro L.;Benoit W.;Zuppiroli L.;Bonard J.-M. .Mechanical properties of carbon nanotubes[J].Applied physics, A. Materials science & processing,1999(3):255-260. |
| [5] | Ebbesen T W .Synthesis and characterization of carbon nanotubes[J].Physics and Chemistry of the Fullerenes,1994,443:11-25. |
| [6] | Erik T. Thostenson;Zhifeng Ren;Tsu-Wei Chou .Advances in the science and technology of carbon nanotubes and their composites: a review[J].Composites science and technology,2001(13):1899-1912. |
| [7] | 张静平,梅炳初,朱教群,周卫兵.铜基复合材料的研究[J].稀有金属快报,2006(10):1-5. |
| [8] | Sun L F;Xie S S;Liu W et al.Materials:creating the narrowest carbon nanotubes[J].NATURE,2000,403(6768):384-384. |
| [9] | Masako Yudasaka;Toshinari Ichihashi;Toshiki Komatsu;Sumio Iijima .Single-wall carbon nanotubes formed by a single laser-beam pulse[J].Chemical Physics Letters,1999(1):91-96. |
| [10] | L. F. Sun;J. M. Mao;Z. W. Pan;B. H. Chang;W. Y. Zhou;G. Wang;L. X. Qian .Growth of straight nanotubes with a cobalt-nickel catalyst by chemical vapor deposition[J].Applied physics letters,1999(5):644-646. |
| [11] | Ajayan P M;Stephan O;Colliex C et al.Aligned car-bon nanotube arrays formed by cutting a polymer resin-nanotube composite[J].SCIENCE,1994,265(5 176):1212-1214. |
| [12] | Dujardin E;Ebbesen T W;Hiura H et al.Capillarity and wetting of carbon nanotubes[J].SCIENCE,1994,265(5 180):1850-1852. |
| [13] | 简发萍,刘平,陈小红,刘新宽,夏雪珂,马凤仓,李伟,何代华.Cu-Cr-O催化剂的合成及其用于碳纳米管的制备[J].功能材料,2013(15):2244-2247. |
| [14] | Colin Park;Mark A.Keane .Catalyst support effects in the growth of structured carbon from the decomposition of ethylene over nickel[J].Journal of Catalysis,2004(2):386-399. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%