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수처리용 Ti/IrO2/SnO2-Sb-Ni 전극의 전기화학적 특성평가

Electrochemical Properties of Ti/IrO2/SnO2-Sb-Ni Electrode for Water Treatment

한국환경과학회지 2020년 29권 10호 p.943 ~ 949
양소영,
소속 상세정보
양소영 ( Yang So-Young ) - Kyungpook National University Advanced Institute of Water Industry

Abstract


In this work, we prepared a heterojunction anode with a surface layer of SnO2-Sb-Ni (SSN) on a Ti/IrO2 electrode by thermal decomposition to improve the electrochemical activity of the Ti/IrO2 electrode. The Ti/IrO2-SSN electrode showed significantly improved electrochemical activity compared with Ti/IrO2. For the 0.1 M NaCl and 0.1 M Na2SO4 electrolytes, the onset potential of the Ti/IrO2-SSN electrode shifted in the positive direction by 0.1 VSCE and 0.4 VSCE, respectively. In 2.0-2.5 V voltages, the concentration in Ti/IrO2-SSN was 2.59-214.6 mg/L Cl2, and Ti/IrO2 was 0.55-49.21 mg/L Cl2. Moreover, the generation of the reactive chlorine species and degradation of Eosin-Y increased by 3.79-7.60 times and 1.06-2.15 times compared with that of Ti/IrO2. Among these voltages, the generation of the reactive chlorine species and degradation of Eosin-Y were the most improved at 2.25 V. Accordingly, in the Ti/IrO2-SSN electrode, it can be assumed that the competitive reaction between chlorine ion oxidation and water oxidation is minimized at an applied voltage of 2.25V.

키워드

IrO2; SnO2-Sb; Water treatment; Free chlorine; Electrocatalyst

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