化工学报2016，Vol.5Issue(5)：1949-1956,8.DOI:10.11949/j.issn.0438-1157.20151130
磁性三乙烯四胺氧化石墨烯对Cu2+的吸附行为
Adsorption behavior of magnetic triethylene tetramine-graphene oxide nanocomposite for Cu2+
摘要
Abstract
A novel composite adsorbent of magnetic triethylene tetramine graphene oxide (M-T-GO) was firstly prepared by isothermal stirring and hydrothermal method to improve adsorption ability and separation efficiency of graphene oxide (GO). M-T-GO was characterized by Fourier transform infrared spectrometer (FT-IR), X-ray diffraction (XRD) and transmission electron microscope (TEM), respectively. The pH, adsorption kinetics, isotherms and thermodynamics of Cu2+ on M-T-GO were studied, indicating that the adsorptions kinetic was well fitted by pseudo-second-order model and the equilibrium adsorption was well described with Langmuir model. The saturated adsorption capacity of Cu2+ was about 245.09 mg·g?1 on M-T-GO. M-T-GO could make separation of the adsorbents easy in the foreign magnetic field and possess good performance of regeneration. The adsorption process of Cu2+ was spontaneous and endothermic by the calculated thermodynamic parameters. X-ray photoelectron spectroscopy (XPS) spectra suggested that Cu2+ was adsorbed on M-T-GO mainly through the chelation and electrostatic attraction.关键词
氧化石墨烯/吸附/Cu2+/动力学/等温线Key words
graphene oxide/adsorption/Cu2+/kinetics/isotherm分类
资源环境引用本文复制引用
陈芳妮,孙晓君,魏金枝,刘献斌,胡琴..磁性三乙烯四胺氧化石墨烯对Cu2+的吸附行为[J].化工学报,2016,5(5):1949-1956,8.基金项目
国家自然科学基金项目(51208159) （51208159）
黑龙江省自然科学基金项目(B201204).supported by the National Natural Science Foundation of China (51208159) and the Nature Science Foundation of Heilongjiang Province (B201204). （B201204）
