研究了二茂铁和氯化铵的用量对气压法制备炭空心球直径的影响.炭空心球的形貌与直径通过场发射扫描电镜表征.实验发现:炭空心球的直径主要分布在1 μm ～10 μm,形貌基本一致.在二茂铁与氯化铵质量比一定时,炭空心球的直径随着原料总量增加而增大.当氯化铵过量时,炭空心球的直径存在双峰分布,但中位径基本不变.在合成过程中,铁颗粒与液态Fe(NH3)2Cl2模板的团聚,以及铁铵络合物之间的相互转化是影响炭空心球直径的主要因素.
The effects of the amount of the ferrocene and ammonium chloride on the diameter distribution of hollow carbon spheres (HCSs) prepared in high-pressure argon were investigated. The morphology and diameter distribution of the HCSs were characterized by field-emission scanning electron microscopy which showed that the diameter of most HCSs ranges from 1 to 10 μm. The median diameter increases with the total amount of the reactants with the same weight ratio of ferrocene to ammonium chloride. When excess ammonium chloride is used, HCSs with a bimodal diameter distribution are prepared; however, the median diameter is almost the same. It is proposed that the aggregation of iron particles and liquid Fe(NH3)2Cl2 templates, and the transformation of the iron amine complexes, in the process mainly influence the diameter distribution of the HCSs.
参考文献
| [1] | Bokros J C .Carbon biomedical devices[J].Carbon,1977,15(06):353-371. |
| [2] | L. Li;H. Song;X. Chen .Hollow carbon microspheres prepared from polystyrene microbeads[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(3):596-599. |
| [3] | Zhong ZY.;Gates B.;Xia YN.;Yin YD. .Preparation of mesoscale hollow spheres of TiO2 and SnO2 by templating against crystalline arrays of polystyrene beads[J].Advanced Materials,2000(3):206-209. |
| [4] | Wu CZ;Zhu X;Ye LL;OuYang CZ;Hu SQ;Lei LY;Xie Y .Necklace-like hollow carbon nanospheres from the pentagon-including reactants: Synthesis and electrochemical properties[J].Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics,2006(21):8543-8550. |
| [5] | Erika Baumeister;Siegfried Klaeger .Advanced New Lightweight Materials: Hollow-Sphere Composites (HSCs) for Mechanical Engineering Applications[J].Advanced Engineering Materials,2003(9):673-677. |
| [6] | Zhang J;Perez R J;Lavernia E J .Documentation of damping capacity of metallic,ceramic and metal-matrix composite materials[J].Journal of Materials Science,1993,28(09):2395-2404. |
| [7] | M. Baibarac;I. Baltog;C. Godon .Covalent functionalization of single-walled carbon nanotubes by aniline electrochemical polymerization[J].Carbon: An International Journal Sponsored by the American Carbon Society,2004(15):3143-3152. |
| [8] | Mabuchi A.;Tokumitsu K.;Kasuh T.;Fujimoto H. .CHARGE-DISCHARGE MECHANISM OF GRAPHITIZED MESOCARBON MICROBEADS[J].Journal of the Electrochemical Society,1995(9):3049-3051. |
| [9] | Song YY;Li Y;Xia XH .One-step pyrolysis process to synthesize dispersed Pt/carbon hollow nanospheres catalysts for electrocatalysis[J].Electrochemistry communications,2007(2):201-205. |
| [10] | Pankhurst QA.;Connolly J.;Jones SK.;Dobson J. .Applications of magnetic nanoparticles in biomedicine [Review][J].Journal of Physics, D. Applied Physics: A Europhysics Journal,2003(13):R167-R181. |
| [11] | Liqiang Xu;Wanqun Zhang;Qing Yang .A novel route to hollow and solid carbon spheres[J].Carbon: An International Journal Sponsored by the American Carbon Society,2005(5):1090-1092. |
| [12] | Wang ZL.;Yin JS. .Graphitic hollow carbon calabashes[J].Chemical Physics Letters,1998(1/2):189-192. |
| [13] | Yongde Xia;Robert Mokaya .Ordered Mesoporous Carbon Hollow Spheres Nanocast Using Mesoporous Silica via Chemical Vapor Deposition[J].Advanced Materials,2004(11):886-891. |
| [14] | Niwase K.;Homae T.;Nakamura KG.;Kondo K. .Generation of giant carbon hollow spheres from C-60 fullerene by shock-compression[J].Chemical Physics Letters,2002(1/2):47-50. |
| [15] | Boyang Liu;Dechang Jia;Qingchang Meng .A novel method for preparation of hollow carbon spheres under a gas pressure atmosphere[J].Carbon: An International Journal Sponsored by the American Carbon Society,2007(3):668-670. |
| [16] | Barreiro A;Hampel S;Rummeli MH;Kramberger C;Gruneis A;Biedermann K;Leonhardt A;Gemming T;Buchner B;Bachtold A .Thermal decomposition of ferrocene as a method for production of single-walled carbon nanotubes without additional carbon sources[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2006(42):20973-20977. |
| [17] | Bremm S.;Meyer G. .Reactivity of ammonium halides: Action of ammonium chloride and bromide on iron and iron(III) chloride and bromide[J].Zeitschrift fur Anorganische und Allgemeine Chemie,2003(10):1875-1880. |
| [18] | Amit M;Zodkevitz A;Makovsky J .Preparation and crystal structure of NH4MnCl3 and NH4FeCl3[J].Israel Journal of Chemistry,1970,8(04):737-740. |
| [19] | Amit M;Horowitz A;Ron E et al.Preparation and crystal structures of some compounds of A3BX5 type (A=Cs,Tl,NH4,B=Mn,Fe,Co,X=Cl,Br)[J].Israel Journal of Chemistry,1973,11(06):749-763. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%