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Energy Storage of NiO/TiO2 Bilayer Films and its Effectiveness in the Degradation of Acid Orange 7
Abstract:
The concept of storing energy in TiO2 when it was illuminated with light and using the catalyst when there was no light was tested for the first time. Ni(OH)2 was incorporated into TiO2 for the energy storage purpose. Ni(OH)2 was subjected to three different temperatures (300 – 500°C) before the incorporation. NiO/TiO2 bilayer films were prepared with spin-coating method. The films were tested for its electrochemical and photoelectrochemical properties in 1 M NaOH. The NiO/TiO2 film prepared with Ni(OH)2 calcined at 300°C showed energy storage potential. The catalysts were then investigated for their catalytic activity in the photocatalytic degradation of acid orange 7 (AO7). The experiments were carried out in a batch reactor containing 500 ml of 20 ppm AO7 and 0.2 g NiO/TiO2 bilayer film. The reaction were carried out under UV illumination for 2 h before continuing without the illumination (dark condition) for another 2 h. NiO/TiO2 showed photcatalytic properties even without illumination implying that the energy stored during the illumination drove the photocatalytic reaction.
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2002-2007
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July 2012
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© 2012 Trans Tech Publications Ltd. All Rights Reserved
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