Shape-Controlled Synthesis and Formation Mechanism of Cobalt Nanopowders by a PVP-Assisted Method

Bing Cong Zhang; Hong Ying Yu; Dong Bai Sun

doi:10.4028/www.scientific.net/MSF.654-656.1186

Paper Titles

New Crystallographic Textures of Nd₂Fe₁₄B/α-Fe Nanocomposite Materials Prepared by Controlled Melt Spinning
p.1170

Effect of Organic Capping on the Magnetic Properties of Au Nanoparticles
p.1174

The Electrical Characterization of Single ZnO Nanowries Field-Effect Transistors
p.1178

Preparation of Photoluminescent Silicon Nanowires Based on Multicrystalline Silicon Wafers
p.1182

Shape-Controlled Synthesis and Formation Mechanism of Cobalt Nanopowders by a PVP-Assisted Method
p.1186

Atomic-Scale-Deformation-Dynamics (ASDS) of Nanowires and Nanofilms
p.1190

Microstructure and Texture Evolution during Friction Stir Processing of AZ31 Mg Alloy
p.1195

Nanostructure Formation during Deep Wire-Drawing of Copper
p.1201

Work-Softening, High Pressure Phase Formation and Powder Consolidation by HPT
p.1205

HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Shape-Controlled Synthesis and Formation Mechanism...

Shape-Controlled Synthesis and Formation Mechanism of Cobalt Nanopowders by a PVP-Assisted Method

Abstract:

Three different kinds of morphologies including spherical, chainlike and wirelike cobalt nanopowders, have been synthesized by chemical reduction of coblat chloride solution with hydrazine hydrate in basic solution. The products were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). It was revealed that the morphologies of the nanopowders depend on the concentration of Co2+ and the way of adding reducing agent (hydrazine hydrate). These two features affected the nucleation sites and the number of nucleuses. When the concentration of Co2+ was low, nucleuses formed in the soft template, while the reducing of the reducing agent added drop wise, a little number of nucleuses was formed. Based on that, a mechanism of formation, as a basis of gram-scale syntheses, was proposed.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Materials Science Forum (Volumes 654-656)

Pages:

1186-1189

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.1186

Citation:

Cite this paper

Online since:

June 2010

Authors:

Bing Cong Zhang, Hong Ying Yu, Dong Bai Sun

Keywords:

Cobalt Nanopowders, Formation Mechanism, Shape Controlled, Soft-Template

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] G. Wang, X. Gou, J. Horvat and J. Park: J. Phys. Chem. C Vol. 112 (2008), p.15220.

Google Scholar

[2] M.W. Larsson, A.I. Persson, L.R. Wallenberg and L. Samuelson: Nat. Mater. Vol. 3 (2004), p.677.

Google Scholar

[3] X. Duan, Y. Huang, R. Agarwal and C.M. Lieber: Nature Vol. 421(2003): p.241.

Google Scholar

[4] Y. Song, R.M. Garcia, R.M. Dorin, H. Wang, Y. Qiu, E.N. Coker, W.A. Steen, J.E. Miller and J.A. Shelnutt: Nano Letters Vol. 7 (2007), p.3650.

DOI: 10.1021/nl0719123

Google Scholar

[5] X. Huang and N. Zheng: J. Am. Chem. Soc. Vol. 131 (2009), p.4602.

Google Scholar

[6] L. Liu, H.Z. Kou, W. Mo, H. Liu and Y. Wang: J. Phys. Chem. B Vol. 110 (2006), p.15218.

Google Scholar

[7] G. Wei, C. Nan, Y. Deng and Y. Lin: Chem. Mater. Vol. 15 (2003), p.4436.

Google Scholar

[8] N.R. Jana, L. Gearheart and C.J. Murphy: Adv. Mater. Vol. 13 (2001), p.1389.

Google Scholar

[9] V.F. Puntes, K.M. Krishnan and A.P. Alivisatos: Science Vol. 291 (2001), p.2115.

Google Scholar

[10] Y. Zhang, Q. Yao, Y. Zhang, T. Cui, D. Li and W. Liu: Cryst. Growth Des. Vol. 8 (2008), p.3206.

Google Scholar

[11] J. Gao, F. Guan, Y. Zhao, W. Yang, Y. Ma, X. Lu, J. Hou and J. Kang: Mater. Chem. Phys. Vol. 71 (2001), p.215.

Google Scholar

[12] C.J. Murphy, A.M. Gole, S.E. Hunyadi and C.J. Orendorff: Inorg. Chem. Vol. 45 (2006), p.7544.

Google Scholar