Citation: Xiaoliang Li, Hao Xu, Wei Yan. Electrochemical oxidation of aniline by a novel Ti/TiO_xH_y/Sb-SnO₂ electrode[J]. Chinese Journal of Catalysis, ;2016, 37(11): 1860-1870. doi: 10.1016/S1872-2067(16)62555-X shu

Electrochemical oxidation of aniline by a novel Ti/TiO_xH_y/Sb-SnO₂ electrode

Department of Environmental Science and Engineering, State Key Laboratory of Multiphase flow in Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shan'xi, China

Received Date: 29 July 2016
Revised Date: 19 September 2016

Fund Project: This work was supported by the National Natural Science Foundation of China (21507104) and the Fundamental Research Funds for the Central Universities of China.

Electrochemical oxidation of aniline in aqueous solution was investigated over a novel Ti/TiO_xH_y/Sb-SnO₂ electrode prepared by the electrodeposition method. Scanning electron micros-copy, X-ray diffraction, and electrochemical measurements were used to characterize its morphol-ogy, crystal structure, and electrochemical properties. Removal of aniline by the Ti/TiO_xH_y/Sb-SnO₂ electrode was investigated by ultraviolet-Visible spectroscopy and chemical oxygen demand (COD) analysis under different conditions, including current densities, initial concentrations of aniline, pH values, concentrations of chloride ions, and types of reactor. It was found that a higher current den-sity, a lower initial concentration of aniline, an acidic solution, the presence of chloride ions (0.2 wt% NaCl), and a three-dimensional (3D) reactor promoted the removal efficiency of aniline. Elec-trochemical degradation of aniline followed pseudo-first-order kinetics. The aniline (200 mL of 100 mg·L^-1) and COD removal efficiencies reached 100% and 73.5%, respectively, at a current density of 20 mA·cm^-2, pH of 7.0, and supporting electrolyte of 0.5 wt% Na₂SO₄ after 2 h electrolysis in a 3D reactor. These results show that aniline can be significantly removed on the Ti/TiO_xH_y/Sb-SnO₂ electrode, which provides an efficient way for elimination of aniline from aqueous solution.
- Aniline,
- Ti/TiO_xH_y/Sb-SnO₂ electrode,
- Electrochemical oxidation,
- Chloride ions,
- Three-dimensional reactor
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Electrochemical oxidation of aniline by a novel Ti/TiOxHy/Sb-SnO2 electrode

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Electrochemical oxidation of aniline by a novel Ti/TiO_xH_y/Sb-SnO₂ electrode