Effect of surface and bulk properties of mesoporous carbons on the electrochemical behavior of GOx-nanocomposites

Tsai Garcia-Perez, Shouzhen Hu, Youngho Wee, Louis Scudiero, Conrad Hoffstater, Jungbae Kim, Su Ha

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Biofuel cell (BFC) electrodes are typically manufactured by combining enzymes that act as catalysts with conductive carbon nanomaterials in a form of enzyme-nanocomposite. However, a little attention has been paid to effects of the carbon nanomaterials' structural properties on the electrochemical performances of the enzyme-nanocomposites. This work aims at studying the effects of surface and bulk properties of carbon nanomaterials with different degrees of graphitization on the electrochemical performances of glucose oxidase (GOx)-nanocomposites produced by immobilizing GOx within a network of carbon nanopaticles. Two types of carbon nanomaterials were used: graphitized mesoporous carbon (GMC) and purified mesoporous carbon (PMC). Graphitization index, surface functional groups, hydrophobic properties, and rate of aggregation were measured for as-received and acid-treated GMC and PMC samples by using Raman spectrometry, X-ray photoelectron spectroscopy (XPS), contact angle measurement, and dynamic light scattering (DLS), respectively. In addition to these physical property characterizations, the enzyme loading and electrochemical performances of the GOx-nanocomposites were studied via elemental analysis and cyclic voltammetry tests, respectively. We also fabricated BFCs using our GOx-nanocomposite materials as the enzyme anodes, and tested their performances by obtaining current-voltage (IV) plots. Our findings suggest that the electrochemical performance of GOx-nanocomposite material is determined by the combined effects of graphitization index, electrical conductivity and surface chemistry of carbon nanomaterials.

Original languageEnglish
Article number84
JournalFrontiers in Chemistry
Issue numberFEB
Publication statusPublished - 2019

Bibliographical note

Publisher Copyright:
© 2019 Garcia-Perez, Hu, Wee, Scudiero, Hoffstater, Kim and Ha.


  • Biofuel cells
  • Enzymatic nanocomposites
  • Glucose oxidase
  • Graphitization index
  • Graphitized mesoporous carbon
  • Hydrophobic properties

ASJC Scopus subject areas

  • Chemistry(all)


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