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首页> 外文期刊>RSC Advances >Preparation and characterization of a TiO2-NT/SnO2–Sb tubular porous electrode with long service lifetime for wastewater treatment process
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Preparation and characterization of a TiO2-NT/SnO2–Sb tubular porous electrode with long service lifetime for wastewater treatment process

机译：使用寿命长的TiO 2 -NT / SnO 2 -Sb管状多孔电极的制备与表征

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摘要

The broad application of highly electrocatalytic SnO2–Sb electrodes for wastewater treatment is limited by their short service lifetime. Herein, a novel substrate structure, tubular porous titanium, was applied to prepare a TiO2-NT/SnO2–Sb electrode, which could greatly improve the stability of the electrode for electrochemical oxidation process. Based on the analysis conducted using a field emission scanning electron microscope (FE-SEM), linked with an energy dispersive spectrometer (EDS), it was demonstrated that a solid solution between Sn and Sb presented a smooth surface of the tubular porous electrode. The crystalline structure and chemical composition of the electrode coating are determined by X-ray diffraction (XRD). Accelerated service life test reveals that under the 0.2 A cm?2 current density in a 0.5 M H2SO4 solution, the TiO2-NT/SnO2–Sb tubular porous electrode has the longest accelerated service lifetime of 68.9 h, which is 10.9 times that of the TiO2-NT/SnO2–Sb plate electrode. Cyclic voltammetry curves (CVs) and linear sweep voltammetry curves (LSVs) reveal the enhanced electroactive surface area and higher oxygen evolution potential (OEP = 1.85 V vs. Ag/AgCl) of the electrode. Moreover, the TiO2-NT/SnO2–Sb tubular porous electrode has the larger outer voltammetric charge q*. During the electrochemical oxidation of pyrimidine, the tubular system constructed using the TiO2-NT/SnO2–Sb tubular porous electrode as the anode also exhibited best electrocatalytic performance, and 97.9% pyridimine removal efficiency and 79.4% COD removal efficiency at 6 h were achieved.
机译：高电催化SnO 2 -Sb电极在废水处理中的广泛应用受到使用寿命短的限制。在这里，一种新型的衬底结构，管状多孔钛，被用来制备TiO 2 -NT / SnO 2 –Sb电极，可以大大提高电极在电化学氧化过程中的稳定性。基于使用场发射扫描电子显微镜（FE-SEM）和能量色散光谱仪（EDS）进行的分析，表明Sn和Sb之间的固溶体呈现出管状多孔电极的光滑表面。电极涂层的晶体结构和化学组成通过X射线衍射（XRD）确定。加速使用寿命测试表明，在0.5 MH 2 SO <0.5的电流密度为0.2 A cm ？2 时， small> 4 溶液，TiO 2 -NT / SnO 2 –Sb管状多孔电极的最长加速寿命为68.9 h，是TiO 2 -NT / SnO 的10.9倍2 –Sb平板电极。循环伏安曲线（CVs）和线性扫描伏安曲线（LSVs）揭示了电极的增强的电活性表面积和更高的氧释放电位（OEP = 1.85 V vs。 Ag / AgCl）。此外，TiO 2 -NT / SnO 2 –Sb管状多孔电极具有较大的外部伏安电荷< em> q *。在嘧啶的电化学氧化过程中，使用TiO 2 -NT / SnO 2 –Sb构造的管状体系管状多孔电极作为阳极也表现出最佳的电催化性能，在6 h时，吡啶胺的去除效率为97.9％，COD去除率为79.4％。

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