Issue 2, 2004
From the journal:

Physical Chemistry Chemical Physics

Effect of alkali metal hydroxide on formation processes of zinc oxide crystallites from aqueous solutions containing Zn(OH)42− ions

Naofumi Uekawa,*ab   Ryo Yamashita,a   Yong Jun Wub  and  Kazuyuki Kakegawaab  

* Corresponding authors

a Department of Materials Technology, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Japan
E-mail: uekawa@faculty.chiba-u.jp
Fax: +81-(0)43-290-3401
Tel: +81-(0)43-290-3373

b Center for Frontier Electronics and Photonics, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba-shi, Japan

Abstract

Aqueous solutions containing Zn(OH)42− ions were prepared by adding 50 ml of 1.5 mol l−1 aqueous alkali metal hydroxide (MOH: M = Li, Na, K, Cs) to 50 ml of 0.1 mol l−1 aqueous zinc nitrate hydrate (Zn(NO3)2·6H2O). Zinc oxide (ZnO) crystallites were obtained by heating aqueous solutions containing Zn(OH)42− ions at ≥348 or 368 K for 3 h. The morphology depended on both of the heating temperature of the Zn(OH)42− aqueous solution and the alkali metal hydroxide used to obtain Zn(OH)42− ions. According to the result of the kinetics of the zinc oxide formation, it was shown that the decomposition of Zn(OH)42− ions on the zinc oxide surface was the rate determining step when NaOH, KOH and CsOH were used to obtain Zn(OH)42− ions. When LiOH was used to obtain Zn(OH)42− ions, the rate determining step was the nucleation of zinc oxide and/or the adsorption of Zn(OH)42− ions.

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Article information

DOI
https://doi.org/10.1039/B310306D
Article type
Paper
Submitted
27 Aug 2003
Accepted
19 Nov 2003
First published
16 Dec 2003

Phys. Chem. Chem. Phys., 2004,6, 442-446

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Effect of alkali metal hydroxide on formation processes of zinc oxide crystallites from aqueous solutions containing Zn(OH)42− ions

N. Uekawa, R. Yamashita, Y. Jun Wu and K. Kakegawa, Phys. Chem. Chem. Phys., 2004, 6, 442 DOI: 10.1039/B310306D

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