Storage of the oxidative energy generated at a UV-irradiated TiO 2 photocatalyst can be achieved by coupling TiO 2 with Ni(OH) 2, a redox-active p-type semiconductor. However, improvement on the oxidative energy storage efficiency of the TiO 2 /Ni(OH) 2 system is becoming a challenge. In this paper, we have investigated the UV-induced oxidative energy storage behavior of a novel nanostructured TiO 2 –Ni(OH) 2 bilayer system fabricated by the cathodic electrodeposition of a Ni(OH) 2 layer onto an oriented TiO 2 nanorod film. The as-prepared bilayer system shows a markedly enhanced apparent quantum yield (6.8%), and the number of the corresponding irradiation–discharge cycles has significantly increased. A possible UV-induced oxidative energy storage mechanism for the bilayer–platinum coupling system is proposed.
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Zhang et al. (2011) studied this question.
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