Hierarchical Porous Graphene–Iron Carbide Hybrid Derived From Functionalized Graphene-Based Metal–Organic Gel as Efficient Electrochemical Dopamine Sensor

Eleni C. Vermisoglou, Petr Jakubec, Ondřej Malina, Vojtěch Kupka, Andreas Schneemann, Roland A. Fischer, Radek Zbořil, Kolleboyina Jayaramulu, Michal Otyepka

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A metal–organic gel (MOG) similar in constitution to MIL-100 (Fe) but containing a lower connectivity ligand (5-aminoisophthalate) was integrated with an isophthalate functionalized graphene (IG). The IG acted as a structure-directing templating agent, which also induced conductivity of the material. The MOG@IG was pyrolyzed at 600°C to obtain MGH-600, a hybrid of Fe/Fe3C/FeOx enveloped by graphene. MGH-600 shows a hierarchical pore structure, with micropores of 1.1 nm and a mesopore distribution between 2 and 6 nm, and Brunauer–Emmett–Teller surface area amounts to 216 m2/g. Furthermore, the MGH-600 composite displays magnetic properties, with bulk saturation magnetization value of 130 emu/g at room temperature. The material coated on glassy carbon electrode can distinguish between molecules with the same oxidation potential, such as dopamine in presence of ascorbic acid and revealed a satisfactory limit of detection and limit of quantification (4.39 × 10−7 and 1.33 × 10−6 M, respectively) for the neurotransmitter dopamine.

Original languageEnglish
Article number544
JournalFrontiers in Chemistry
Volume8
DOIs
StatePublished - 30 Jul 2020

Keywords

  • dopamine
  • gel
  • graphene
  • metal–organic gel
  • nanocomposite
  • sensing

Fingerprint

Dive into the research topics of 'Hierarchical Porous Graphene–Iron Carbide Hybrid Derived From Functionalized Graphene-Based Metal–Organic Gel as Efficient Electrochemical Dopamine Sensor'. Together they form a unique fingerprint.

Cite this