Supersensitive metal free in-situ synthesized graphene oxide@cellulose nanocrystals acetone sensitive bioderived sensors

Jonathan Tersur Orasugh, Valentine Saasa, Suprakas Sinha Ray, Bonex Mwakikunga

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

A series of graphene oxide@cellulose nanocrystal (GO@CNC) nanoparticles (NPs) were synthesized in this study using a room temperature-based simple modified hummers process. The morphological structures, as well as chemical characteristics of these materials, were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), and other techniques. The results show that the as-prepared nanoparticles are made up of crystallite grains with an average size of around 7.82, 14.69, 10.77, 7.82, and 12.51 nm for GO, CNC, GO1@CNC1, GO2@CNC3, and GO3@CNC3 respectively, and [sbnd]OH & [sbnd]COOH functionalities on the NPs' surfaces. GO@CNC NPs exhibit significantly better sensing characteristics towards acetone when compared to virgin GO nanoplatelets; specifically, the optimal sensor based on GO3@CNC3 NPs showed the highest response (60.88 at 5 ppm), which was higher than that of the virgin GO sensor at 200 °C operating temperature and including those reported. Furthermore, the sensors have a high sensitivity towards acetone in sub-ppm concentrations as well as a detection limit of 5 ppm, making it a viable candidate for diabetes breath testing.

Original languageEnglish
Article number124514
JournalInternational Journal of Biological Macromolecules
Volume241
DOIs
Publication statusPublished - 30 Jun 2023

Keywords

  • Acetone
  • Cellulose nanocrystals
  • Composite
  • Gas sensor
  • Graphene oxide

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • Molecular Biology

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