An electroactive ion exchange hybrid film of polypyrrole/reduced graphene oxide/NiCo-layered double hydroxide (PPy/rGO/NiCo-LDH) with three-dimensional (3D) “sand rose” flower-like structure was fabricated by a two-step electrodeposition method. NiCo-LDH nanosheets were electrodeposited on the surface of polypyrrole/graphene oxide (PPy/GO) conducting substrate for the removal of dodecyl sulfonate ions (DS⁻ ions) with low concentrations. Herein, the electroreduction of GO to rGO enhanced the electron conductivity and the unique structure of hybrid PPy/rGO/NiCo-LDH film ensured the fast diffusion of electrons as well as ions. The electrochemical performance of hybrid film was characterized by cyclic voltammetry (CV) and electrochemical impedance spectrum (EIS), and the effects of the applied electrode potential, initial concentration of DS⁻ ions and pH of the simulated wastewater on the uptake kinetics of DS⁻ ions were investigated. As a result, the coexisting anions had no obvious effect on the adsorption of DS⁻ ions and the removal percentage of DS⁻ ions reached 92.31% in a 10 mg L⁻¹ DS⁻ solution with 0.8 V electrode potential. Especially, in the pH ranging from 5.0 to 9.0, the DS⁻ ions were efficiently removed. In addition, the double-driven ion exchange mechanism coupling electric double-layer (EDL) effect of rGO and pseudo capacitance effect of PPy to remove DS⁻ ions was proposed based on the X-ray photoelectron spectroscopy (XPS) and CV analyses. It is expected that such a novel PPy/rGO/NiCo-LDH hybrid electroactive ion-exchange film separation technology based on the double-driven mechanism could be a potential technique for wastewater treatment.

通过两步电沉积法制备了具有三维（3D）“沙玫瑰”花状结构的聚吡咯/还原氧化石墨烯/ NiCo层状双氢氧化物（PPy / rGO / NiCo-LDH）的电活性离子交换杂化膜。方法。镍钴-LDH纳米片进行电沉积聚吡咯的表面上/石墨烯氧化物（PPY / GO）进行用于除去十二烷基磺酸离子（DS的底物^-离子）低浓度。在此，GO到rGO的电还原增强了电子传导性，并且混合PPy / rGO / NiCo-LDH膜的独特结构确保了电子和离子的快速扩散。杂化膜的电化学性能进行表征通过循环伏安法（CV）和电化学阻抗谱（EIS），和所施加的电极电位的影响，DS的初始浓度^-对DS的摄取动力学离子和pH值的模拟废水的^-对离子进行了研究。其结果是，共存的阴离子对DS的吸附没有明显的效果^-离子和DS的去除百分比^-离子在10毫克的L达到92.31％^-1 DS ^-电极电位为0.8 V的溶液。特别是，在pH值范围从5.0到9.0的DS ^-离子有效地去除。此外，双驱动型离子交换机制耦合RGO的双电层（EDL）效应和聚吡咯的伪电容效应，以除去DS ^-基于X射线光电子能谱（XPS）和CV分析，提出了离子。期望基于双驱动机理的这种新颖的PPy / rGO / NiCo-LDH混合电活性离子交换膜分离技术可能成为废水处理的潜在技术。