【摘要】 采用恒温搅拌法和水热法首次制备磁性三乙烯四胺氧化石墨烯(M-T-GO),并通过SEM和XPS对M-T-GO进行表征.以M-T-GO为吸附剂,分析p H值、吸附时间和初始浓度对阴离子染料酒石黄(TY)和阳离子染料亚甲基蓝(MB)吸附效果的影响.并对吸附动力学和吸附等温线进行拟合.结果表明:M-T-GO对离子型染料的吸附过程符合Langmuir吸附等温式和拟二级反应动力学描述.M-T-GO对TY和MB具有较好的吸附性能,饱和吸附量分别为157.23mg/g和169.49mg/g.与GO相比,M-T-GO对离子型染料的吸附效果更优异,同时具有快速分离和易再生的优点.更多还原

【Abstract】 Magnetic Triethylene-tetramine Graphene oxide(M-T-GO) was firstly synthesized by constant temperature stirring and hydrothermal methods in this work, and characterized by Scanning electron microscope(SEM) and X-ray photoelectron spectrum(XPS). Adsorption capacity of ionic dyes on M-T-GO under different p H, adsorption time and initial concentration were investigated. At the same time adsorption kinetics and adsorption isotherm were fitted respectively. Pseudo-second-order model and Langmuir model fitted the adsorption of ionic dyes on M-T-GO. The adsorption property of M-T-GO for TY and MB was outstanding and the saturated adsorption capacities were 157.23mg/g and 169.49mg/g, respectively. Compared with GO, M-T-GO could remove ionic dyes more effectively. Moreover, M-T-GO made separation easy in the foreign magnetic field and possessed good performance of regeneration.更多还原