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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.121  No.1409 (January) (2013)  >  pp.62-67

Journal of the Ceramic Society of Japan
<<Previous article Vol.121  No.1409 (January) (2013)   pp.62 - 67 Next article>>

Synthesis of ZnO sols by low-temperature heating of ethylene glycol solution and control of their photoluminescence with addition of glucose

Naofumi UEKAWA1), Tatsuya FUJINO1), Takashi KOJIMA1), Kazuyuki KAKEGAWA1)
1) Graduate School of Engineering, Chiba University

ZnO nanoparticles and their stable sols were prepared by heating an ethylene glycol solution of Zn(NO3)2·6H2O (0.1 mol/L, 50 mL) with 2 mL of NH3 aq at 328 K for 24 h. The obtained sol contained ZnO nanoparticles with average diameter of around 20 nm. The particle size decreased with increased the concentration of NH3. Furthermore, the ZnO nanoparticles dispersed in the sols showed a green photoluminescence peak around 550 nm. The heating procedure of the ethylene glycol solution at 328 K yielded stable sols of ZnO nanoparticles with photoluminescence characteristics. In order to control the photoluminescence characteristics of the ZnO nanoparticles, the ethylene glycol solution which contained zinc nitrate hydrate, glucose, and 1 mol/L of NH3 aq was heated at 328 K for 24 h. The obtained ZnO nanoparticles dispersed in the sols showed a blue photoluminescence peak at around 420 nm. The glucose reacted with Zn2+ ions as a reduction agent. Accordingly, the simple one-pot synthesis process using the heating of the ethylene glycol solution containing zinc nitrate hydrate, NH3, and glucose achieved control of photoluminescence spectra and enabled the stable dispersion of ZnO nanoparticles.


Keyword:
Zinc oxide, Nanoparticle, Sol, Photoluminescence, Glucose

Received: July 31, 2012
Accepted: October 24, 2012 , Published online: January 01, 2013
Copyright © 2013 The Ceramic Society of Japan

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