Synthesis of KMnO4-treated magnetic graphene oxide nanocomposite (Fe3O4@GO/MnO x ) and its application for removing of Cu2+ ions from aqueous solution

Huining Zhang; Qing Chang; Yu Jiang; Huili Li; Yahong Yang

doi:10.1088/1361-6528/aaaa2f

Synthesis of KMnO₄-treated magnetic graphene oxide nanocomposite (Fe₃O₄@GO/MnO _x ) and its application for removing of Cu²⁺ ions from aqueous solution

Nanotechnology. 2018 Apr 3;29(13):135706. doi: 10.1088/1361-6528/aaaa2f.

Authors

Huining Zhang¹, Qing Chang, Yu Jiang, Huili Li, Yahong Yang

Affiliation

¹ School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China. Gansu Academy of Sciences, Lanzhou 730030, People's Republic of China. School of Civil Engineering, Wuhan University, Wuhan 430072, People's Republic of China.

PMID: 29436518
DOI: 10.1088/1361-6528/aaaa2f

Abstract

A magnetic KMnO₄-treated graphene-oxide-based nanocomposite, Fe₃O₄@GO/MnO _x , was synthesized through a facile hydrothermal technique. The properties of the Fe₃O₄@GO/MnO _x nanocomposite were characterized by SEM, XRD and FTIR. Batch experiments showed that the maximum adsorption capacity calculated by the Langmuir model for Cu²⁺ was 62.65 mg g^-1 at T = 303.15 K. Kinetics and XPS analysis also revealed that the mechanism of Cu²⁺ removal was mainly a chemical adsorption process involving both the MnO _x particles and oxygen functional groups. The prepared Fe₃O₄@GO/MnO _x was found to be an ideal adsorbent for the removal of Cu²⁺ ions due to the MnO _x particle coating, and was easily separated using a magnetic field after utilization. Reusability studies imply that Fe₃O₄@GO/MnO _x is a suitable material for heavy metal ion removal from aqueous solutions in real applications.