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Structural study and phase transition investigation in a simple synthesis of porous architected-ZnO nanopowder

Shang, Congcong and Barnabé, Antoine Structural study and phase transition investigation in a simple synthesis of porous architected-ZnO nanopowder. (2013) Materials Characterization, 86. 206-211. ISSN 1044-5803

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Official URL: http://dx.doi.org/10.1016/j.matchar.2013.10.004

Abstract

In this work, zinc oxide powder with a rectangular-shaped porous architecture, made of numerous spherical nanometric particles,was obtained. Asimple precipitation/decomposition procedure was used comprising a zinc oxalate intermediate, obtained from zinc sulfate and oxalic acid without any additives. Detailed studies on zinc oxalate dehydration, decomposition and zinc oxide formation, were carried out using in-situ temperature X-ray diffraction and thermogravimetric analysis. During the investigation, the temperature dependence of particle sizes, lattice parameters and crystal structures of ZnC2O4·2H2O, ZnC2O4 and ZnO nanopowders were analyzed from room temperature to 450 °C. Structural transitions were also discussed. The structure and morphology of the as-prepared ZnO nanopowder were investigated by electron microscopy and compared to the crystalline rectangular shape of ZnC2O4·2H2O. The calcination temperature, counter ion and precipitate agent were found to be related to the product's shape and diameter. Spherical ZnO nanoparticleswith diameters of less than 20 nm and a maximum specific surface of 53 m2/g were obtained using thismethod.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Materials Characterization website : http://www.sciencedirect.com/science/journal/10445803
HAL Id:hal-01167288
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:24 Jun 2015 09:05

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