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Vol. 25 No. 10 (2013): Vol 25 Issue 10

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Morphology Control of CoC2O4·4H2O and Co3O4 Microspheres

https://doi.org/10.14233/ajchem.2013.OH4
Hanmei Hu
School of Materials and Chemical Engineering, Anhui University of Architecture, Hefei, Anhui Province, P.R. China ; Anhui Key Laboratory of Advanced Building Materials, Anhui University of Architecture, Hefei, Anhui Province, P.R. China
Junchan Xu
School of Materials and Chemical Engineering, Anhui University of Architecture, Hefei, Anhui Province, P.R. China
Weifei Wu
School of Materials and Chemical Engineering, Anhui University of Architecture, Hefei, Anhui Province, P.R. China
Dongdong Liu
School of Materials and Chemical Engineering, Anhui University of Architecture, Hefei, Anhui Province, P.R. China
Lili Zhang
School of Materials and Chemical Engineering, Anhui University of Architecture, Hefei, Anhui Province, P.R. China
Zhengxiang Hou
School of Materials and Chemical Engineering, Anhui University of Architecture, Hefei, Anhui Province, P.R. China

Corresponding Author(s) : Hanmei Hu

hmhu@ustc.edu

Asian Journal of Chemistry, Vol. 25 No. 10 (2013): Vol 25 Issue 10

Abstract

CoC2O4·4H2O microspheres composed of nanorods were firstly prepared through a microwave-assisted homogeneous precipitation reaction of Co(NO3)2·6H2O and (NH4)2C2O2 using NH3·H2O as a morphology control agent. Then, Co3O4 microspheres were successfully obtained by calcinating CoC2O4·4H2O microspheres at 300 ºC for 2 h, which preferably preserve the morphology of precursor. The products are characterized by X-ray diffraction, field-emission scanning electron microscopy and UV-visible absorption spectrum. CoC2O4·4H2O microspheres are comprised of numerous short nanorods with diameters of 30-60 nm and lengths of 400-800 nm. A single Co3O4 microsphere is constructed by nanoparicle-based nanorods and the minimum building block is Co3O4 nanoparticles with diameters of 20-30 nm. The growth mechanism is simply discussed.

Keywords

Microspheres Co3O4 Nanomaterials Microwave
Hu, H., Xu, J., Wu, W., Liu, D., Zhang, L., & Hou, Z. (2013). Morphology Control of CoC2O4·4H2O and Co3O4 Microspheres. Asian Journal of Chemistry, 25(10), 5513–5515. https://doi.org/10.14233/ajchem.2013.OH4
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