Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (10): 1998-2004.doi: 10.3866/PKU.WHXB20091028

• ARTICLE • Previous Articles     Next Articles

Temperature Effects on ZnO Film Electrodeposition

WANG Yan-Kun, ZHANG Jian-Min, LAN Meng   

  1. Department of Chemistry, Zhengzhou University, Zhengzhou 450001, P. R. China|Department of Chemistry, Henan Institute of Education, Zhengzhou 450014, P. R. China
  • Received:2009-05-20 Revised:2009-07-14 Published:2009-09-29
  • Contact: ZHANG Jian-Min E-mail:zhjm@zzu.edu.cn

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Abstract:

A thermodynamic study of temperature effects on the 0.1 mol·L-1 Zn(NO3)2 systemby means of potential pH diagram, species repartition diagram, and solubility of ZnO/Zn(OH)2 was presented with the aim of guiding future electrodeposition conditions and for the prediction of the ultimate product. These thermodynamic calculations were testified by analyzing curves of the cathodic current density as a function of time and cyclic voltammetry (CV), X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal gravimetric-differential scanning calorimeter (TG-DSC), and ultraviolet-visible (UV-Vis) spectroscopy. Optical studies revealed that the ZnO films exhibited a high transmittance in the visible region (>80%) and a steep absorption edge. A reaction mechanism was proposed for ZnO electrodeposition in zinc nitrate aqueous solutions.

Key words: ZnO, Temperature, Electrodeposition, Reaction mechanism