School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, China; Shaanxi Key Laboratory of Green Preparation and Functionalization of Inorganic Materials, Xi'an, 710021, China.
School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, China; Shaanxi Key Laboratory of Green Preparation and Functionalization of Inorganic Materials, Xi'an, 710021, China.
J Environ Manage. 2020 Dec 15;276:111357. doi: 10.1016/j.jenvman.2020.111357. Epub 2020 Sep 12.
A Cu/GO/Ti electrode was prepared by electrodeposition for removal of nitrate by means of the electrochemical reduction. The structure, morphology and characteristics of the electrode were characterized by scanning electron microscopy (SEM), Raman spectroscopy (RS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical workstation, and Cu/GO/Ti was used as the cathode to remove nitrate in water by electrochemical process. Characterization results indicated that GO was successfully deposited on the Ti plate and it was partially reduced to reduced graphene. Dendritic and granular Cu particles are agglomerated on the surface of GO layer by chemical interaction in the form of metallic Cu, CuO and CuO, and the dendrite Cu layer increased the specific surface area of Cu layer. The addition of GO layer increases the electroreduction activity for nitrate. Furthermore, through comparison with Cu/Ti electrode, Cu/GO/Ti electrode improved the percentage of nitrate removal from 78.8% to 91.5%, and energy consumption decreased from 0.82 to 0.47 kW h/g NO-N. The present results showed the promising application of GO-based electrodes with Cu in electrocatalytic nitrate removal.
采用电化学沉积法制备了一种用于通过电化学还原去除硝酸盐的 Cu/GO/Ti 电极。采用扫描电子显微镜（SEM）、拉曼光谱（RS）、X 射线衍射（XRD）、X 射线光电子能谱（XPS）和电化学工作站对电极的结构、形貌和特性进行了表征，并将 Cu/GO/Ti 用作阴极通过电化学过程去除水中的硝酸盐。表征结果表明，GO 成功沉积在 Ti 板上，部分还原为还原氧化石墨烯。树枝状和颗粒状的 Cu 颗粒通过化学相互作用以金属 Cu、CuO 和 CuO 的形式聚集在 GO 层的表面，树枝状的 Cu 层增加了 Cu 层的比表面积。GO 层的添加提高了硝酸盐的电还原活性。此外，与 Cu/Ti 电极相比，Cu/GO/Ti 电极将硝酸盐的去除率从 78.8%提高到 91.5%，能耗从 0.82 降低到 0.47kW·h/gNO-N。结果表明，基于 GO 的电极与 Cu 结合在电催化硝酸盐去除方面具有广阔的应用前景。
