production in a water-acetonitrile solution containing iodide as an electron donor was investigated over dye-sensitized photocatalysts under visible light irradiation, as a potential water-splitting system based on an iodide redox mediator. The rates of evolution decreased with increasing proportion of water in the solutions, because of a decrease in the energy gap between the redox potential of and the highest occupied molecular orbital levels of the dyes, which decreases the efficiency of electron transfer from to dye.
Effect of Water/Acetonitrile Ratio on Dye-Sensitized Photocatalytic Evolution under Visible Light Irradiation
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Abe, R., Sayama, K., and Sugihara, H. (October 28, 2004). "Effect of Water/Acetonitrile Ratio on Dye-Sensitized Photocatalytic Evolution under Visible Light Irradiation." ASME. J. Sol. Energy Eng. August 2005; 127(3): 413–416. https://doi.org/10.1115/1.1878854
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