Chemically Modified Graphene

The Influence of Structural Properties on the Assessment of Antioxidant Capacity

Kai Hwee Hui, Martin Pumera, Alessandra Bonanni

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Graphene materials obtained by different synthetic routes possess dissimilar amount of defects and surface functionalities, which can influence their electrochemical performance towards the detection of electroactive probes. Oxygen-containing groups can be either detrimental to the heterogeneous charge transfer or promote favorable interactions between the graphene surface and the analyte of interest, depending on the structure of the latter. Here, we compared three chemically modified graphenes, obtained by various procedures and carrying different amounts of oxygen functionalities, for the detection of standard gallic acid, a compound commonly used as an index of the antioxidant capacity of food and beverages. We found that electrochemically reduced graphene provided the best electrochemical performance in terms of calibration sensitivity, selectivity, and linearity of response. Our findings are important in order to understand the suitability of graphene platforms for the assessment of food quality.

Original languageEnglish
Pages (from-to)11793-11798
Number of pages6
JournalChemistry - A European Journal
Volume21
Issue number33
DOIs
Publication statusPublished - 2015 Aug 1

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Graphite
Antioxidants
Graphene
Structural properties
Oxygen
Gallic Acid
Beverages
Charge transfer
Calibration
Defects
Acids

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Organic Chemistry

Cite this

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Chemically Modified Graphene : The Influence of Structural Properties on the Assessment of Antioxidant Capacity. / Hui, Kai Hwee; Pumera, Martin; Bonanni, Alessandra.

In: Chemistry - A European Journal, Vol. 21, No. 33, 01.08.2015, p. 11793-11798.

Research output: Contribution to journalArticle

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