title: Fabrication of a novel graphene oxide/β-FeOOH composite and its adsorption behavior for copper ions from aqueous solution.
abstract: A graphene oxide (GO)/β-FeOOH composite was prepared by the liquid insert method and was characterized by XRD, FT-IR, SEM and TEM. The adsorption capacity of the composite was evaluated by the removal of copper ions (Cu(2+)) from aqueous solution. The effect of initial pH, contact time and absorbent dose on the removal efficiency of Cu(2+) was investigated by batch experiments. Langmuir and Freundlich models were employed to describe the adsorption equilibrium. The adsorption kinetics was investigated by both the pseudo-first-order and pseudo-second-order kinetics models. The results showed that the GO/β-FeOOH composite exhibited excellent adsorption capacity for Cu(2+) and under the optimum experimental conditions, the removal rate of Cu(2+) can reach ca. 93.8%. The adsorption isotherm was a good fit with the Langmuir model and the adsorption process was described by the pseudo-second-order kinetics model.
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, P. R. China. tshjiang@ujs.edu.cn.
authors.forename: Tingshun
authors.initials: T
authors.lastname: Jiang
authors.forename: Lu
authors.initials: L
authors.lastname: Yan
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Yingying
authors.initials: Y
authors.lastname: Li
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhao
authors.forename: Hengbo
authors.initials: H
authors.lastname: Yin