Graphene-Templated Synthesis of Magnetic Metal Organic Framework Nanocomposites for Selective Enrichment of Biomolecules

Gong Cheng, Zhi Gang Wang, Sachira Denagamage, Si Yang Zheng

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

Successful control of homogeneous and complete coating of graphene or graphene-based composites with well-defined metal organic framework (MOF) layers is a great challenge. Herein, novel magnetic graphene MOF composites were constructed via a simple strategy for self-assembly of well-distributed, dense, and highly porous MOFs on both sides of graphene nanosheets. Graphene functionalized with magnetic nanoparticles and carboxylic groups on both sides was explored as the backbone and template to direct the controllable self-assembly of MOFs. The prepared composite materials have a relatively high specific surface area (345.4 m2 g-1), and their average pore size is measured to be 3.2 nm. Their relatively high saturation magnetization (23.8 emu g-1) indicates their strong magnetism at room temperature. Moreover, the multifunctional composite was demonstrated to be a highly effective affinity material in selective extraction and separation of low-concentration biomolecules from biological samples, in virtue of the size-selection property of the unique porous structure and the excellent affinity of the composite materials. Besides providing a solution for the construction of well-defined functional graphene-based MOFs, this work could also contribute to selective extraction of biomolecules, in virtue of the universal affinity between immobilized metal ions and biomolecules.

Original languageEnglish (US)
Pages (from-to)10234-10242
Number of pages9
JournalACS Applied Materials and Interfaces
Volume8
Issue number16
DOIs
StatePublished - Apr 27 2016

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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