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 journalArticlepeer-review

10 Citations (Scopus)

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
Volume15
Issue number28
DOIs
Publication statusPublished - 2019 Jul 12

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)

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