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Molecules 2012, 17(1), 703-715; doi:10.3390/molecules17010703
Article

Controlled Fabrication of Flower-like Nickel Oxide Hierarchical Structures and Their Application in Water Treatment

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Received: 22 December 2011; in revised form: 4 January 2012 / Accepted: 9 January 2012 / Published: 12 January 2012
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Abstract: Flower-like NiO hierarchical structures with 2–5 μm diameter assembled from nanosheet building blocks have been successfully fabricated via a wet-chemical method combined with thermodecomposition technology. The template-free method is facile and effective in preparing flower-like NiO superstructures in high yield. The intermediate product and final hierarchical structures are characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform IR (FTIR), and thermogravimetric analysis (TGA). The effects of growth temperature and reaction time on the morphologies of the as-prepared structures were investigated by SEM characterization and a possible mechanism for the formation of flower-like NiO is proposed. Based on the nitrogen adsorption and desorption measurements, the BET surface area of the as-obtained sample is 55.7 m2/g and the pore-size distribution plot indicates a bimodal mesopore distribution, with pore sizes of ca. 2.6 nm and 7.4 nm, respectively. In comparison with sphere-like and rod-like structures, the flower-like NiO hierarchical structures show an excellent ability to rapidly remove various pollutants when used as adsorbent and photocatalyst in waste-water treatment, which may be attributed to its unique hierarchical and porous surface structures.
Keywords: nickel oxide; hierarchical structures; fabrication nickel oxide; hierarchical structures; fabrication
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Tao, F.; Shen, Y.; Wang, L. Controlled Fabrication of Flower-like Nickel Oxide Hierarchical Structures and Their Application in Water Treatment. Molecules 2012, 17, 703-715.

AMA Style

Tao F, Shen Y, Wang L. Controlled Fabrication of Flower-like Nickel Oxide Hierarchical Structures and Their Application in Water Treatment. Molecules. 2012; 17(1):703-715.

Chicago/Turabian Style

Tao, Feifei; Shen, Yongmiao; Wang, Linxia. 2012. "Controlled Fabrication of Flower-like Nickel Oxide Hierarchical Structures and Their Application in Water Treatment." Molecules 17, no. 1: 703-715.


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