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李哲楠,赵玉,李鹏,杨胜翔,王立章.十二烷基硫酸钠对IrO2-Ta2O5/SnO2- Sb-Mn/Ti电极电催化性能影响[J].稀有金属材料与工程(英文),2017,46(10):2963~2968.[lizhenan,zhaoyu,lipeng,yangshengxiang and wanglizhang.Effect of Sodium dodecyl sulfate on IrO2 - Ta2O5 / SnO2 - Sb - Mn/Ti electrode electric catalytic performance[J].Rare Metal Materials and Engineering,2017,46(10):2963~2968.]
Effect of Sodium dodecyl sulfate on IrO2 - Ta2O5 / SnO2 - Sb - Mn/Ti electrode electric catalytic performance
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Received:June 23, 2015  Revised:September 26, 2015
DOI:
Key words: Sodium dodecyl sulfate (SDS)  IrO2 - Ta2O5 / SnO2 - Sb - Mn/Ti  Electrocatalytic oxidation  phenol
Foundation item:江苏省基础研究计划(自然科学基金)资助项目(BK2011224); 中央高校基本科研业务费专项资金资助项目(2013QNA20)
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lizhenan,zhaoyu,lipeng,yangshengxiang and wanglizhang  
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Abstract:
      In this paper, an anionic surfactant, i.e. sodium dodecyl sulfate (SDS) was employed for preparation of the IrO2-Ta2O5/SnO2-Sb-MnO2/Ti electrodes through the pyrolysis process. The microstructure and phase composition of the electrodes were analyzed via scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the cyclic voltammetry (CV) and polarization curves were also measured to evaluate their electro-catalytic activity by using an electrochemical station (type CS310). The obtained results revealed that the employment of the SDS could effectively improve the microstructure as well as enhance the electro-catalytic ability of the electrodes. Under the conditions of this study, the optimum dosage of SDS was 1.6 g/L for preparation of the IrO2-Ta2O5/SnO2-Sb-MnO2/Ti electrodes and the crystallization degree as high as 99.83% could be obtained. The electrode performances and stability were further investigated by anodic oxidation of phenol and accelerated life test. The experimental data depicted the phenol and chemical oxygen demand (COD) removal efficiency were increased from 68.5% and 60.1% to 79.2% and 67.5% when electrodes without and with dosage of 1.6 g/L were used, respectively, for phenol degradation at conditions of current density of 15 mA/cm2 and reaction time of 180 min; moreover, the accelerated life were raised to 68 h, which is much longer than that of the former (52 h).
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