CBC@rGO复合电极材料的制备及其电化学性能

Preparation and Performance of CBC@rGO Composite Electrode Material

为了研发高效降解水中苯酚的电化学技术,将玉米芯生物质炭(CBC)负载于导电性能好的还原氧化石墨烯(rGO)上,制备得到高性能复合电极材料CBC@rGO。通过循环伏安测试CBC@rGO的电化学性能,通过扫描电子显微镜仪器、BET比表面积及孔径分析仪和X射线光电子能谱分析仪等表征物化性能,探讨CBC@rGO高效降解水中苯酚的影响规律;基于电化学降解实验,获得CBC@rGO对水中苯酚的最佳去除效果。结果表明:CBC@rGO的最大比电容为125.82 F/g(扫描速率为10 mV/s),与其比表面积、总孔容量及F-C-F键强度成正比;0~10 min内,CBC@rGO对苯酚的降解速率(k=0.025 81 L·mol^(-1)·s^(-1))明显高于CBC和rGO。由此,CBC@rGO作为一种绿色高效的电极材料,可明显提高其导电能力并解决石墨烯纳米材料的团聚问题,为水中苯酚的高效去除提供了新的技术和方法。

In order to develop an electrochemical technology for efficient degradation of phenol in water,the high-performance CBC@rGO electrode composite was prepared by loading corncob biochar(CBC)on reduced graphene oxide(rGO)that facilitated with good conductivity.The electrochemical capacity of CBC@rGO was evaluated by cyclic voltammetry tests.The effect of surface properties on phenol degradation efficiency of CBC@rGO in water was revealed by analysis of scanning electron microscope,BET specific surface area and pore size analyzer,and X-ray photoelectron spectroscopy.The optimal performance of CBC@rGO for phenol degradation was finally investigated by electrochemical degradation tests.The results show that,the maximum specific capacitance of CBC@rGO is 125.82 F/g(at scanning rate of 10 mV/s),which is proportional to its specific surface area,total pore volume and intensity of F-C-F bond.The phenol degradation rate of CBC@rGO(k=0.02581 L·mol^(-1)·s^(-1))is significantly higher than that of CBC and rGO within 10 minutes.Hence,as a green and efficient electrode material,CBC@rGO can significantly improve its conductivity and solve the problem of aggregation of graphene nanomaterials,this may provide new Technology and method for the efficient removal of phenol in water.