以苯和甲苯为碳源,二茂铁为催化剂,含硫化合物为助催化剂,采用浮游催化裂解法制备了碳纳米管,并采用TEM对不同条件下所得碳纳米管进行了形态分析.结果发现,碳源中苯和甲苯的配比对碳纳米管的形态有着重要的影响.以纯苯为碳源时,产物主要为直线型碳纳米管,并存在极少量短的弯曲型碳纳米管.随着碳源中甲苯比例的增加,产物中折线型碳纳米管增加.以纯甲苯为碳源,产物中仍有少量直线型碳纳米管,而不完全是折线型碳纳米管;此外,产物中还发现了极少量分支型碳纳米管.根据所得结果讨论分析了甲苯的加入对碳纳米管形态的影响以及各种碳纳米管的形成机理,认为可能是由于甲苯在催化热解过程中产生的碳种不同于苯催化热解所产生的碳种,造成碳在催化剂颗粒各处浓度不同,从而在碳纳米管的不同部位引入五元环和七元环而形成各种形态的碳纳米管.
参考文献
| [1] | Iijima S .Helical Microtubules of Griphitic Carbon[J].Nature,1991,354:56-58. |
| [2] | Iijima S;Ichihashi T .Single-shell carbon nanotubes of 1-nm diameter[J].Nature,1993,363:603-605. |
| [3] | Bethune D s;Klang C H;de Vries M S .Cobalt-catalysed growth of carbon nanotubes with single-atomic-layer walls[J].Nature,1993,363:605-607. |
| [4] | Ebbesen T W;Auayan P M .Large-scale synthesis of carbon nanotubes[J].Nature,1992,358:220. |
| [5] | 刘畅,成会明.电弧放电法制备纳米碳管[J].新型炭材料,2001(01):67-71. |
| [6] | Yacamam M J;Yoshida M M;Rendon L .Catalytic growth of carbon nicrotutbules with fulleren structure[J].Applied Physics Letters,1993,62:202-206. |
| [7] | Dai H;Wong W;Lu Y et al.Synthesis and characterization of carbide nanorods[J].Nature,1995,375:769-771. |
| [8] | 朱宏伟,慈立杰,梁吉,魏秉庆,徐才录,吴德海.浮游催化法半连续制取碳纳米管的研究[J].新型炭材料,2000(01):48-51. |
| [9] | Guo T.;Thess A.;Colbert DT.;Smalley RE.;Nikolaev P. .CATALYTIC GROWTH OF SINGLE-WALLED NANOTUBES BY LASER VAPORIZATION[J].Chemical Physics Letters,1995(1/2):49-54. |
| [10] | Thess A;Lee R;Smalley R E;et al. .Crystalline of tubular fullerences[J].Science,1996,273(5274):483-487. |
| [11] | Laplaze D.;Maser WK.;Flamant G.;Guillard T.;Loiseau A.;Bernier P. .Carbon nanotubes: The solar approach[J].Carbon: An International Journal Sponsored by the American Carbon Society,1998(5/6):685-688. |
| [12] | Anglaret E.;Guillard T.;Journet C.;Flamant G.;Laplaze D. Bernier P.;Sauvajol JL.;Bendiab N. .Raman characterization of single wall carbon nanotubes prepared by the solar energy route[J].Carbon: An International Journal Sponsored by the American Carbon Society,1998(12):1815-1820. |
| [13] | RITCHER H;Hernadi K;Caudano R et al.Formation of nanotubes in low pressure hydrocarbon flames[J].CARBON,1996,34(11):427. |
| [14] | 潘春旭,Liming Yuan,Kozo Saito.扩散火焰合成碳纳米管研究[J].新型炭材料,2001(03):24-27. |
| [15] | Takashi Kyotani;Li-fu Tsai;Akira Tomita .Preparation of Ultrafine Carbon Tubes in Nanochannels of an Anodic Aluminum Oxide Film[J].Chemistry of Materials,1996(8):2109-2113. |
| [16] | Growing Y-junction carbon nanotubes[J].Nature,1999(6759):253-254. |
| [17] | Liu C;Fan Y Y;Liu M;et al. .Hydrogen storage in single-walled carbon nanotubes at room temperature[J].Science,1999,286:1127-1129. |
| [18] | 毛宗强,徐才录,阎军,梁吉,孙公敏,魏秉庆,吴德海.碳纳米纤维储氢性能初步研究[J].新型炭材料,2000(01):64-67. |
| [19] | 戴贵平,刘敏,王茂章,成会明.纳米碳管电化学储氢的研究进展[J].新型炭材料,2002(03):70-74. |
| [20] | Z.Jia;Z.Wang .Study on poly(methyl methacrylate)/carbon nanotube composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1999(1/2):395-400. |
| [21] | 李莉香,李峰,英哲,杨全红,成会明.纳米碳管/聚合物功能复合材料[J].新型炭材料,2003(01):69-74. |
| [22] | 王敏炜,李凤仪,彭年才.碳纳米管--新型的催化剂载体[J].新型炭材料,2002(03):75-79. |
| [23] | Dan Zhou;Supapan S .Comples branching phenomena in the growth of carbon nanotubes[J].Chemical Physics Letters,1995,238:286-289. |
| [24] | 杨子芹,沈曾民,陈晓红,查旭峰.Co催化热分解制备弯曲状碳纳米管的研究[J].新型炭材料,2000(02):34-38. |
| [25] | Youkui Wen;Zengmin Shen .Synthesis of regular coiled carbon nanotubes by Ni-catalyzed pyrolysis of zcetylene and a growth mechanism analysis[J].Carbon,2001,39:2369-2374. |
| [26] | 戈敏,沈曾民.气相催化裂解法制备微米级螺旋形炭纤维的研究[J].新型炭材料,2003(01):31-36. |
| [27] | B. C. Satishkumar;P. John Thomas;A. Govindaraj .Y-junction carbon nanotubes[J].Applied physics letters,2000(16):2530-2532. |
| [28] | Gan B.;Zhang Q.;Rusli.;Yoon SF.;Yu J.;Huang QF.;Chew K. Ligatchev VA.;Zhang XB.;Li WZ.;Ahn J. .Y-junction carbon nanotubes grown by in situ evaporated copper catalyst[J].Chemical Physics Letters,2001(1/2):23-28. |
| [29] | Growing Y-junction carbon nanotubes[J].Nature,1999(6759):253-254. |
| [30] | 陈晓红 .催化热解法制备气相生长炭纤维和碳纳米管的研究[D].北京:北京化工大学,1998. |
| [31] | Baker R T K;Alonzo J R;Dunesic J A et al.Effect of the surface state of iron on filamentous carbon formation[J].Journal of Catalysis,1982,72(01):74. |
| [32] | Holstein WL. .THE ROLES OF ORDINARY AND SORET DIFFUSION IN THE METAL-CATALYZED FORMATION OF FILAMENTOUS CARBON[J].Journal of Catalysis,1995(1):42-51. |
| [33] | Hongjie Dai;Rinzler Andrew G;Pasha Nikolaev et al.Single-wall nanotubes produced by metal-catalyzed disproportionaltion of carbon monoxide[J].CHEMICAL PHYSICS LETTERS,1996,260:471-475. |
| [34] | Pavel Nikolaev;Michael J. Bronikowski;R. Kelley Bradley;Frank Rohmund;Daniel T. Colbert;K. A. Smith;Richard E. Smalley .Gas-phase catalytic growth of single-walled carbon nanotubes from carbon monoxide[J].Chemical Physics Letters,1999(1/2):91-97. |
| [35] | ENDO M;Tadeuchi K;Igarashi S et al.The production and structure of pyrolytic carbon nanotubes(PCNT)[J].Journal of Physics and Chemistry of Solids,1993(54):1841. |
| [36] | Amelinckx S;Zhang X B;Bernaerts D;et al. .A formation Mechanism for catalytically grown helix-shaped graphite nanotubes[J].Science,1994,265:635-639. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%