Implications of Chemical Reduction Using Hydriodic Acid on the Antimicrobial Properties of Graphene Oxide and Reduced Graphene Oxide Membranes

Abayomi Babatunde Alayande, Hee-Deung Park, Johannes S. Vrouwenvelder, In S. Kim

Research output: Contribution to journalArticle

Abstract

The antimicrobial properties of graphene-based membranes such as single-layer graphene oxide (GO) and modified graphene oxide (rGO) on top of cellulose ester membrane are reported in this study. rGO membranes are made from GO by hydriodic acid (HI) vapor treatment. The antibacterial properties are tested after 3 h contact time with selected model bacteria. Complete bacterial cell inactivation is found only after contact with rGO membranes, while no significant bacterial inactivation is found for the control i) GO membrane, ii) the mixed cellulose ester support, and the iii) rGO membrane after additional washing that removes the remaining HI. This indicates that the antimicrobial effect is neither caused by the graphene nor the membrane support. The antimicrobial effect is found to be conclusively linked to the HI eliminating microbial growth, at concentrations from 0.005%. These findings emphasize the importance of caution in the reporting of antimicrobial properties of graphene-based surfaces.

Original languageEnglish
Article number1901023
JournalSmall
DOIs
Publication statusPublished - 2019 Jan 1

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Graphite
Oxides
Graphene
Membranes
Acids
Cellulose
Esters
hydroiodic acid
Washing
Bacteria
Vapors
Growth

Keywords

  • bacterial viability
  • contact inactivation
  • graphene-based membranes
  • hydriodic acid
  • wastewater reuse and desalination

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

Cite this

Implications of Chemical Reduction Using Hydriodic Acid on the Antimicrobial Properties of Graphene Oxide and Reduced Graphene Oxide Membranes. / Alayande, Abayomi Babatunde; Park, Hee-Deung; Vrouwenvelder, Johannes S.; Kim, In S.

In: Small, 01.01.2019.

Research output: Contribution to journalArticle

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