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Photocatalytic Removal of Cu Ions from Aqueous Cu-EDTA Solution Using Solution Combusted Zinc Oxide Nanopowder

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Nano-sized ZnO powder was prepared by "solution-combustion method (SCM)." The ZnO powder using Zn(OH)2 and glycine as an oxidant and a fuel (F/O = 0.8), showed good powder characteristics, such as average grain size of 30 nm and the specific surface area of 120 m2/g. and it was used as a semiconductor photocatalyst to remove Cu ions from aqueous Cu-EDTA solution. The result was then compared with other semiconductor photocatalyst powders such as titanium dioxide (TiO2) powder (P25, Degussa) and TiO2 powder prepared by homogeneous precipitation process at low temperature (HPPLT). The SCM ZnO nanopowder showed excellent photocatalytic properties. The Cu++ ions were completely removed from the solution within 90 min. However, for the other two powders, no complete removal of the ions was observed within the reaction time of 180 min. The ZnO powder synthesized at the fuel/oxidant ratio of 0.8, showed higher PL intensity at UV region than the other photocatalytic powders. The superior photoreduction ability of SCM ZnO nanopowder might be due to its excellent UV absorption capacity.
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Document Type: Research Article

Publication date: 2008-10-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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