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Issue 48, 2014
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Morphology control and fabrication of multi-shelled NiO spheres by tuning the pH value via a hydrothermal process

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Abstract

Controlling the morphology of nickel oxide (NiO) nanostructures is crucial to obtain excellent physical and chemical performance. Hence, the morphology of NiO was tuned by adjusting the pH value of the precursor solutions with NH3·H2O via a hydrothermal process and subsequent calcination. Different morphologies, including nanoparticles, porous structures and multi-shelled microspheres, were obtained with pH values varying from 8.30 to 10.90. The morphology evolution of as-synthesized NiO with the pH value indicates the important role of OH in controlling the product morphology. Moreover, the formation mechanism of different NiO nanostructures at different pH values was discussed. Furthermore, the surface area and magnetic properties of NiO with different morphologies were also investigated, and indeed, these properties are very sensitive to the morphology. This work provides a facile way to control the morphology of NiO nanostructures, which also implies the potential application in modern science and technology with the modified magnetic properties.

Graphical abstract: Morphology control and fabrication of multi-shelled NiO spheres by tuning the pH value via a hydrothermal process

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Publication details

The article was received on 20 Aug 2014, accepted on 16 Oct 2014 and first published on 20 Oct 2014


Article type: Paper
DOI: 10.1039/C4CE01718H
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CrystEngComm, 2014,16, 11096-11101

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    Morphology control and fabrication of multi-shelled NiO spheres by tuning the pH value via a hydrothermal process

    L. Chu, M. Li, Z. Wan, L. Ding, D. Song, S. Dou, J. Chen and Y. Wang, CrystEngComm, 2014, 16, 11096
    DOI: 10.1039/C4CE01718H

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