Inverse opal-like marcoporous RuO 2 electrodes for enhancing the mass transfer in electro-oxidation of tricyclazole
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Inverse opal‑like marcoporous RuO2 electrodes for enhancing the mass transfer in electro‑oxidation of tricyclazole Ruiqian Liu1 · Siqi Liu1 · Qianrui Liu1 · Yonghao Zhang2 · Jiansheng Li1 · Weiqing Han1 · Xiuyun Sun1 · Jinyou Shen1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In order to improve the mass transfer of anodic oxidation, an inverse opal-like marcoporous RuO2 electrode (IOMP-RuO2) was designed to enhance the concentration diffusion and molecule-to-electrode collision. Characterization methods including SEM, XRD, BET, LSV, CV, EIS and CA were performed to evaluate the properties of the IOMP-RuO2. In addition, the electro-oxidation capacity of the R uO2 electrode prepared at varying calcination temperature was also investigated. Results show that calcination temperature can affect the electro-oxidation performance of IOMP-RuO2 from the specific surface area, crystallinity of R uO2, voltammetric charge and impedance. Thereinto, crystallinity of R uO2 and impedance played decisive roles in the electrochemical oxidation. The fine crystallinity and lower impedance of IOMP-RuO2 acquired by 450 °C increased the electronic transport rate and allowed less redox couple to be involved in oxygen evolution, contributing to the best oxidation performance amongst others. Under this calcination temperature, the IOMP-RuO2 possesses larger electroactive areas, smaller electric resistance and enhanced mass transfer as compared to the planar RuO2 electrode. Furthermore, the IOMP-RuO2 gave a 42.7% higher degradation rate than that observed for the planar RuO2 electrode in the abatement of tricyclazole (TC) after 180 min. The high rate constant (2.14 × 10–2 min−1) and current efficiency (61.1%) achieved by IOMP-RuO2 contributed to a low energy consumption of 0.04744 kWh m g−1. Thus, these findings promoted the IOMP-RuO2 as an alternative electrode for wastewater decontamination. Keywords Inverse opal-like porous electrode · Mass transfer · Tricyclazole · Electrochemical oxidation
1 Introduction Oxidative electrochemical technology, which features the amenability to automation, environment protective, no chemical requirements and low-volume application, was one of the most efficacious procedures for purification of Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10934-020-00914-z) contains supplementary material, which is available to authorized users. * Siqi Liu [email protected] * Weiqing Han [email protected] 1
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Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China School of Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China
wastewater polluted with toxic and bio-refractory compounds [1–7]. It was generally conceived that the degradation process and efficiency were strongly affected by the electrode material [8]. Lead dioxides (
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