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 OJPC  Vol.2 No.4 , November 2012
Solar Water Splitting by Semiconductor Nanocomposites and Hydrogen Storage with Quinoid Systems
Abstract: Photocatalytic splitting of water was carried out in a two-phase system. The efficiencies of different types of nanocrystalline semiconductors were investigated and compared with commercialised TiO2 nanopowder. Generated hydrogen was chemically stored by use of a quinoid system, which seems to be useable for fuel cells. Solar light sensitive nanocomposites of CdSe/TiO2 and CdSxSey/TiO2 type were prepared and their good photocatalytic performance was demonstrated. In the visible range of 400 - 600 nm CdSxSey/TiO2 composites show comparable good results as in the UV range, which is very promising for their use as solar light water splitters. The concept of sensitising TiO2 with different kind of semiconductor nanoparticles, which is already known from quantum dot sensitised solar cells (QDSC), was demonstrated here for water splitting as well. Furthermore the kinetics of the storage reaction was investigated by UV-Vis spectroscopy and found to proceed via a consecutive reaction with an 1:1 charge transfer complex of quinone and hydroquinone as intermediate. The electron transfer process via a Fe2+/Fe3+ redox couple was investigated by UV-Vis spectroscopy as well as by a dye reaction on the TiO2 surface. A light microscopic view of the surface of larger aggregates of TiO2 nanoparticles indicated different areas of photocatalytic activity with photocatalysis preferentially at catalyst edges. The global electron transfer process could be traced by following the dye colour in real time.
Cite this paper: T. Wilke, D. Schricker, J. Rolf and K. Kleinermanns, "Solar Water Splitting by Semiconductor Nanocomposites and Hydrogen Storage with Quinoid Systems," Open Journal of Physical Chemistry, Vol. 2 No. 4, 2012, pp. 195-203. doi: 10.4236/ojpc.2012.24027.
References

[1]   R. Pike and P. Earis, “Powering the World with Sunlight,” Energy & Enviromental Science, Vol. 3, No. 2, 2010, p. 173. doi:10.1039/b924940k

[2]   N. Kelly, T. Gibson and D. Ouwerkerk, “Generation of High-Pressure Hydrogen for Fuel Cell Electric Vehicles Using Photovoltaic-Powered Water Electrolysis,” International Journal of Hydrogen Energy, Vol. 36, No. 24, 2011, pp. 15803-15825. doi:10.1016/j.ijhydene.2011.08.058

[3]   E. Durgun, S. Ciraci, W. Zhou and T. Yildirim, “Transition-Metal-Ethylene Complexes as High-Capacity Hydrogen-Storage Media,” Physical Review Letters, Vol. 97, No. 22, 2006, pp. 1-4. doi:10.1103/PhysRevLett.97.226102

[4]   M. Gratzel, “Photoelectrochemical Cells,” Nature, Vol. 414, No. 6861, 2001, pp. 338-344. doi:10.1038/35104607

[5]   A. Hagfeldt and M. Gratzel, “Light-Induced Redox Reactions in Nanocrystalline Systems,” Chemical Reviews, Vol. 95, No. 1, 1995, pp. 49-68. doi:10.1021/cr00033a003

[6]   M. Kaneko and I. Okura, “Photocatalysis—Science and Technology,” Springer, Heidelberg, 2002.

[7]   D. Ogermann, T. Wilke and K. Kleinermanns, “CdSxSey/ TiO2 Solar Cell Prepared with Sintered Mixture Deposition,” Open Journal of Physical Chemistry, Vol. 2, No. 1, 2012, pp. 47-57. doi:10.4236/ojpc.2012.21007

[8]   D. R. Cooper and N. M. Dimitrijevic, “Photosensitization of CdSe/ZnS QDs and Reliability of Assays for Reactive Oxygen Species Production,” Nanoscale, Vol. 2, No. 1, 2010, pp. 114-121. doi:10.1039/b9nr00130a

[9]   I. Robel, M. Kuno and P. V. Kamat, “Size-Dependent Electron Injection from Excited CdSe Quantum Dots into TiO2 Nanoparticles,” Journal of the American Chemical Society, Vol. 129, No. 14, 2007, pp. 4136-4137. doi:10.1021/ja070099a

[10]   M. Gratzel, “Dye-Sensitized Solar Cells,” Journal of Photochemistry and Photobiology C, Vol. 4, No. 2, 2003, pp. 145-153. doi:10.1016/S1389-5567(03)00026-1

[11]   T. Meyer, D. Ogermann, A. Pankrath, K. Kleinermanns and T. J. J. Müller, “Phenothiazinyl Rhodanylidene Merocyanines for Dye-Sensitized Solar Cells,” The Journal of Organic Chemistry, Vol. 77, No. 8, 2012, pp. 3704-3715. doi:10.1016/10.1021/jo202608w

[12]   R. Menzel, D. Ogermann, S. Kupfer, D. Weib, H. Gorls, K. Kleinermanns, L. González and R. Beckert, “4-Methoxy-1,3-thiazole Based Donor-Acceptor Dyes: Characterization, X-ray Structure, DFT Calculations and Test as Sensitizers for DSSC,” Dyes and Pigments, Vol. 94, No. 3, 2012, pp. 512-524. doi:10.1016/j.dyepig.2012.02.014

[13]   T. Wilke, K. Kleinermanns, to be published, 2012

[14]   T. Ohno, K. Fujihara, K. Sarukawa, F. Tanigawa and M. Matsumura, “Splitting of Water by Combining Two Photocatalytic Reactions through a Quinone Compound Dissolved in an Oil Phase,” Zeitschrift für Physikalische Chemie, Vol. 213, No. 2, 1999, pp. 165-174. doi:10.1524/zpch.1999.213.Part_2.165

[15]   A. L. Rogach, A. Kornowski, M. Gao, A. Eychmüller and H. Weller, “Synthesis and Characterization of a Size Series of Extremely Small Thiol-Stabilized CdSe Nanocrystals,” The Journal Of Physical Chemistry B, Vol. 103, No. 16, 1999, pp. 3065-3069. doi:10.1021/jp984833b

[16]   G. A. Martínez-Castanón, M. G. Sánchez-Loredo, J. R. Martínez-Mendoza and F. Ruiz, “Synthesis of CdS Nanoparticles: A Simple Method in Aqueous Media,” Azojomo, Vol. 1, No. 1, 2005, pp. 1-2. doi:10.2240/azojomo0170

[17]   J. Yu, X. Zhao, J. Du and W. Chen, “Preparation, Microstructure and Photocatalytic Activity of the Porous TiO2 Anatase Coating by Sol-Gel Processing”, Journal of Sol-Gel Science and Technology, Vol. 17, No. 2, 2000, pp. 163-171. doi:10.1023/A:1008703719929

[18]   T. Wilke, M. Schneider and K. Kleinermanns, “1,4-Hydroquinone is a Hydrogen Reservoir for Fuel Cells and Recyclable via Water Splitting,” 2012.

 
 
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