Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 336, Issue 1-3, Pages 41-45Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2008.11.012
Keywords
Cobalt; Aqueous phase; Microspheres; Magnetic; Glycerin
Categories
Funding
- Scientific Research Foundation for the Returned Overseas Chinese Scholars
- State Education Ministry (SRF for ROCS, SEM)
- Natural Science Foundation of Jilin Province for Excellent Young Scholars [20040117]
- Scientific Research Foundation of Hunan University
Ask authors/readers for more resources
Cobalt microspheres constructed by the assembly of nanoplatelets have been synthesized by a wet chemical reductive procedure at room temperature with the help of glycerin and citric acid and without additional surfactants. The size of the microspheres is about 2-5 mu m and that of the nanoplatelets assembled the microspheres is tens of nanometers in thickness. In this synthetic system, cobalt acetate was employed as Co source, sodium hydroxide was used to manipulate the pH value of the reaction system, and hydrazine hydrate was used as a reducing agent. A series of experiments were performed with different amounts of glycerin, from 0.5mL to 4 mL, the results reveal that the formation of cobalt microspheres is assisted by glycerin. The shape, structure, and magnetic properties of the final products were investigated by XRD, SEM and VSM. This kind of Co nanostructures shows a ferromagnetic behavior at room temperature with enhanced coercivity, and has potential uses in magnetic recording devices and other related nanodevices. A possible mechanism for the formation of microspheres is proposed. (C) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available