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Preparation and electrochemical application of praseodymium modified TiO2-NTs/SnO2-Sb anode by cyclic voltammetry method

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Abstract

A Pr-doped TiO2-NTs/SnO2-Sb electrode was prepared by a simple method, cyclic voltammetry(CV). The methyl orange(MO)aqueous solution was selected as a simulated wastewater. The ordered microstructural TiO2-NTs substrate was synthesized by an electrochemical method to obtain large specific surface area and high space utilization. The phase structure, electrode surface morphology and electrochemical properties of electrodes were characterized by XRD, SEM and electrochemical technology, respectively. The results showed that praseodymium oxide was successfully doped into the SnO2-Sb film by CV method. Due to the doped Pr, the oxygen evolution potential increased from 2.25 V to 2.40 V. The degradation of MO was investigated by UV-vis. The C t /C 0 (φ) was studied as a function to obtain the optimal parameters, such as the amount of doped Pr, current density and initial dye concentration. In addition, the degradation process followed pseudo-first-order reaction kinetics and the rate constant was 0.099 3 min-1. The result indicated that the introduction of Pr reduced the formation of oxygen vacancies or enhanced the formation of adsorbed hydroxyl radical groups on the surface, thus leading to better activity and stability.

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Correspondence to Yan Wang  (王 燕).

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Supported by the National Natural Science Foundation of China(No. 20706041) and the Natural Science Foundation of Tianjin (No. 09JCYBJC06500)

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Wang, Y., Chen, Y., Zhu, H. et al. Preparation and electrochemical application of praseodymium modified TiO2-NTs/SnO2-Sb anode by cyclic voltammetry method. Trans. Tianjin Univ. 22, 247–253 (2016). https://doi.org/10.1007/s12209-016-2727-6

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  • DOI: https://doi.org/10.1007/s12209-016-2727-6

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