Magnetic Nanoparticles@Metal-Organic Framework Composites as Sustainable Environment Adsorbents

Xiaoyan Wu,Mudassar Iqbal,Jing Zhu,Gege Zhao,Karna Ramachandraiah,Fei Ke,An Pan,Chuanyi Peng,Nianqiao Qin

doi:10.1155/2019/1454358

Abstract

Metal-organic frameworks (MOFs) are an intriguing class of porous inorganic-organic hybrid networks synthesized from metal ions with multidentate organic ligands. MOFs have uniform and tunable cavities and tailorable chemistry, making them promising materials for hazardous component removal from the environment. Controllable integration of magnetic nanoparticles (NPs) and MOFs is leading to the creation of many novel multifunctional MOF-based composites, which exhibit advanced performance that is superior to both of the individual units. This review summarizes the recent significant advances in the development of MOF-based magnetic heterostructure materials for the removal of hazardous contaminants from the environment. The successful methods reported till date for the magnetic MOF synthesis are also provided. In the final section, we provide our views on the future development of the magnetic MOF heterostructure materials for the pollution management.

Highlights

In recent years, environmental pollution is increasing and posing serious threat to the ecosystem and human health [1]
We summarize a review of recent developments in the Metal-organic frameworks (MOFs)-based magnetic nanocomposites for the removal of hazardous contaminants from the environment
Compared with traditional adsorption materials, magnetic MOF adsorbents have a larger specific surface area and more surface active sites and can be quickly and recovered by an external magnetic field, which is in line with the modern green concept

Summary

Introduction

Environmental pollution is increasing and posing serious threat to the ecosystem and human health [1]. Fe3O4@SiO2@Zn-TDPAT core-shell magnetic material displayed a high performance activity in adsorption of polluted dyes [44]. The results suggested that MOF-based magnetic core-shell materials are promising adsorbents for dye removal from wastewater These MOF-based magnetic composites have high capacity toward a certain dye; the application of selective removal of specific dye from a mixture of multiple dye-polluted water needs more development. In 2018, Yang et al reported a novel Fe3O4-PSS@ZIF-67 magnetic core-shell composite for selective adsorption of methyl orange (MO) from MO and methylene blue (MB) mixed solution (Figure 7) [45]. We prepared thiol-functionalized Fe3O4@Cu3(btc) core-shell magnetic microspheres and investigated their application in selective adsorption of heavy metal ions in the presence of other background ions from water [51].

Adsorption Mechanism

Findings

Conclusion and Outlook