摘要
用改进的Hummers法制备氧化石墨,以氧化石墨和三聚氰胺为前驱体用退火法制备不同掺氮量的氮掺杂石墨烯,通过电泳沉积技术制备NG/Ti电极,并用XRD、SEM、FT-IR对样品进行表征;以亚甲基蓝为目标污染物进行电增强吸附性能测试,探究了样品的掺氮量、施加电位对电增强吸附效果的影响。结果表明,三聚氰胺与氧化石墨质量比为1∶1时制备的NG1.0/Ti电极具有最佳的吸附效果;施加-0.6 V的电位,NG1.0/Ti电极对亚甲基蓝(5 mg/L)的最大平衡吸附量为117.33 mg/g,为不施加电压下的1.78倍;NG1.0/Ti电极的褶皱结构和较大的比电容有利于电增强吸附。
Nitrogen-doped graphene with various nitrogen contents was prepared by annealing method using graphite oxide and melamine as precursors,while the graphite oxide was prepared by modified Hummers method.NG/Ti electrodes were prepared by electrophoretic deposition technique.The samples were characterized by XRD,SEM and FT-IR techniques.The methylene blue was chosen as the model pollutant to confirm the behavior of electroadsorption technique,while effects of nitrogen content and applied potential on behavior of electroadsorption technique were also investigated.The results showed that the NG1.0/Ti electrode prepared with 1∶1 mass ratio of melamine to graphite oxide exhibited excellent adsorption amount to methylene blue,whose maximum equilibrium adsorption capacity was 117.33 mg/g at a applied potential of-0.6 V and 1.78 times of that without applied voltage.The fold structure and larger specific capacitance of NG1.0/Ti electrode was beneficial to enhance the behavior of electroadsorption technique.
作者
艾鑫
张秀芳
王冠龙
董晓丽
马春
AI Xin;ZHANG Xiufang;WANG Guanlong;DONG Xiaoli;MA Chun(School of Light industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China)
出处
《大连工业大学学报》
CAS
北大核心
2020年第2期131-135,共5页
Journal of Dalian Polytechnic University
基金
国家自然科学基金项目(21577008)。
关键词
氮掺杂石墨烯
电极
电增强吸附
亚甲基蓝
N-doped graphene
electrodes
electroadsorption
methylene blue
