title: Fabrication of novel magnetic nanocomposite with a number of adsorption sites for the removal of dye.
abstract: In this current work, a novel functional ionic liquid-coated Fe3O4@chitosan@graphene oxide was synthesized and tested as adsorbents for methylene blue through batch adsorption tests. The physicochemical properties of the adsorbent were investigated using scanning electron microscopy, x-ray diffraction, and fourier transform infrared spectroscopy. The adsorption capacity of the adsorbent was evaluated as a function of initial dye concentration, pH, contact time and temperature. The adsorption results indicated that the adsorption followed a pseudo-second-order kinetics. The equilibrium adsorption was well-described by the Langmuir isotherm model and the maximum adsorption capacity was to be 262 mg/g. The negative value of ΔH° shows exothermic nature of adsorption process and the negative value of ΔG° indicated that the adsorption reaction is spontaneous. Moreover, the ionic liquid-coated Fe3O4@chitosan@graphene oxide could be repeatedly used by simple treatment without obvious structure and performance degradation. The obtained results suggested that the potential applications of ionic liquid-coated Fe3O4@chitosan@graphene oxide in deep-purification of polluted water.
authors: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors: Leilei
authors: L
authors: Li
authors: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors: Huimin
authors: H
authors: Duan
authors: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors: Xiaojiao
authors: X
authors: Wang
authors: Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China. Electronic address: chm_yfl518@163.com.
authors: Chuannan
authors: C
authors: Luo
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D052578:Ionic Liquids / Q000737:chemistry; D007700:Kinetics; D058185:Magnetite Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D013696:Temperature; D013816:Thermodynamics
chemical_list: D004396:Coloring Agents; D052578:Ionic Liquids; D058185:Magnetite Nanoparticles; D006108:Graphite; D048271:Chitosan
keywords: Adsorption; Ionic liquid; Magnetic chitosan