期刊
CHEMOSPHERE
卷 228, 期 -, 页码 611-618出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.04.071
关键词
TiO2 nanotube; Anodization; Nitrate reduction; Electrolysis; Electrochemical reduction
资金
- Advanced Technology Center (ATC) - Korea Institute of Energy Technology Evaluation and Planning (KETEP, Republic of Korea) of Ministry of Trade and Energy (MOTIE, Republic of Korea) [10067622]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10067622] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The purpose of this research is to investigate the possibility of using a Ti plate with TiO2 nanotube arrays as a novel cathode for nitrate reduction. TiO2 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 TiO2 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 RuO2/Ti anode and a Ti plate with a TiO2 nanotubular layer as a cathode was operated to treat synthetic wastewater containing up to 600 mg L-1 of NO3-N. The Ti plate with a TiO2 nanotubular layer was compared with other cathodes such as Ti, Cu, Ni, and Stainless Steel. The Ti plate with an anatase TiO2 nanotubular layer with a layer thicknesses greater than 45 gm was able to show the most efficient nitrate reduction. (C) 2019 Elsevier Ltd. All rights reserved.
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