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Semiconductor photoelectrodes for solar of splitting water

E. INDREA1,* , S. DREVE1, D. T. SILIPAS1, G. MIHAILESCU1, L. OLENIC1, A. PETRU1, V. DANCIU2, V. COSOVEANU2, A. NICOARA2, L. E. MURESAN3, E. J. POPOVICI3, V. POPESCU4, N. HOREA-IUSTIN4, V. R. TETEAN5, G. L. BAIA5, T. NYARI6

Affiliation

  1. National Institute for Research and Development of Isotopic and Molecular Technologies, Donath 71 – 103, 400293 Cluj-Napoca, Romania
  2. Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, 1 M. Kogalniceanu, 400028 Cluj-Napoca, Romania
  3. Raluca Ripan Institute for Research in Chemistry , 30 Fantanele, 400294 Cluj-Napoca, Romania
  4. Technical University of Cluj-Napoca, 15 C. Daicoviciu, 400020 Cluj-Napoca, Romania
  5. Babes-Bolyai University, Physics Faculty, 1 M. Kogalniceanu, 400028 Cluj-Napoca, Romania
  6. National Institute for Research and Development in Electrochemistry and Condensed Matter, 144 A.Podeanu, 300860 Timisoara, Romania

Abstract

The production of hydrogen from water using solar light is very promising for generation of an ecologically pure energy carrier. Different types of TiO2 aerogels have been successfully synthesized and the sample with the highest BET surface area was morphologically characterized with the help of SEM measurements. A series of ZnO / TiO2 aerogels were prepared by the sol-gel method followed by supercritical drying. By varying the ZnO quantity (1-10 %) and the nature of Zn precursors - zinc (II) nitrate hexahydrate and zinc (II) acetylacetonate, an extensive study has been performed. We try to extend the photoresponse by introducing defects into the TiO2 lattice by doping with transition metal ions Fe and Ni. Noble metals, in particular silver, has been used to increases the photocatalytic capacity of titania..

Keywords

Electrode materials, Chemical synthesis, Microstructure, X-ray diffraction.

Submitted at: Feb. 25, 2008
Accepted at: Aug. 28, 2008

Citation

E. INDREA, S. DREVE, D. T. SILIPAS, G. MIHAILESCU, L. OLENIC, A. PETRU, V. DANCIU, V. COSOVEANU, A. NICOARA, L. E. MURESAN, E. J. POPOVICI, V. POPESCU, N. HOREA-IUSTIN, V. R. TETEAN, G. L. BAIA, T. NYARI, Semiconductor photoelectrodes for solar of splitting water, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 9, pp. 2213-2222 (2008)