氨基修饰磁性氧化石墨烯吸附离子型染料性能

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pH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.

Adsorption performance of amino functionalized magnetic graphene oxide composite to ionic dyes.

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 pH, 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.