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Ti plate with TiO nanotube arrays as a novel cathode for nitrate reduction.

著者 Kim DE , Pak D
Chemosphere.2019 Apr 26 ; 228():611-618.
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The purpose of this research is to investigate the possibility of using a Ti plate with TiO nanotube arrays as a novel cathode for nitrate reduction. TiO nanotube arrays were grown on a Ti plate by anodization in a glycerol based electrolyte and annealed to change their crystallographic structure. Morphological and crystallographic structures of Ti plates with a TiO nanotubular layer were analysed before and after anodization or annealing by using energy-dispersive spectroscopy, Brunauer-Emmett-Teller analysis and X-ray diffraction. Cyclic voltammetry and electrochemical impedance spectroscopy were also performed to test the electrochemical reactivity towards nitrate reduction. A lab-scale electrochemical reactor with a RuO/Ti anode and a Ti plate with a TiO nanotubular layer as a cathode was operated to treat synthetic wastewater containing up to 600 mg L of NO-N. The Ti plate with a TiO nanotubular layer was compared with other cathodes such as Ti, Cu, Ni, and Stainless Steel. The Ti plate with an anatase TiO nanotubular layer with a layer thicknesses greater than 45 μm was able to show the most efficient nitrate reduction.
PMID: 31059959 [PubMed - as supplied by publisher]
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