Reduced Magnetism in Core-Shell Magnetite@MOF Composites

Sameh K Elsaidi; Michael A Sinnwell; Debasis Banerjee; Arun Devaraj; Ravi K Kukkadapu; Timothy C Droubay; Zimin Nie; Libor Kovarik; Murugesan Vijayakumar; Sandeep Manandhar; Manjula Nandasiri; B Peter McGrail; Praveen K Thallapally

doi:10.1021/acs.nanolett.7b03451

Reduced Magnetism in Core-Shell Magnetite@MOF Composites

Nano Lett. 2017 Nov 8;17(11):6968-6973. doi: 10.1021/acs.nanolett.7b03451. Epub 2017 Oct 24.

Authors

Sameh K Elsaidi¹, Michael A Sinnwell, Debasis Banerjee, Arun Devaraj, Ravi K Kukkadapu, Timothy C Droubay, Zimin Nie², Libor Kovarik, Murugesan Vijayakumar, Sandeep Manandhar³, Manjula Nandasiri, B Peter McGrail², Praveen K Thallapally

Affiliations

¹ Chemistry Department, Faculty of Science, Alexandria University , P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt.
² Energy and Environment Directorate, Pacific Northwest National Laboratory , Richland, Washington 99352, United States.
³ Department of Mechanical Engineering, University of Texas at El Paso , El Paso, Texas 79968, United States.

PMID: 29048916
DOI: 10.1021/acs.nanolett.7b03451

Abstract

The magnetic susceptibility of synthesized magnetite (Fe₃O₄) microspheres was found to decline after the growth of a metal-organic framework (MOF) shell on the magnetite core. Detailed structural analysis of the core-shell particles using scanning electron microscopy, transmission electron microscopy, atom probe tomography, and⁵⁷Fe-Mössbauer spectroscopy suggests that the distribution of MOF precursors inside the magnetic core resulted in the oxidation of the iron oxide core.

Keywords: MOF; Metal−organic framework; Mössbauer spectroscopy; atom probe tomography; core−shell magnetic microparticle; magnetite.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.