Enhanced UV Protection, Heavy Metal Detection, and Antibacterial Properties of Biomass-Derived Carbon Dots Coated on Protective Fabrics

Arulappan Durairaj, Moorthy Maruthapandi, John H.T. Luong, Ilana Perelshtein, Aharon Gedanken

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Carbon dots (CDs) were simply prepared from charcoal by hydrothermal processing at 180 °C for 15 h without any chemicals. The as-prepared CDs with an average diameter of 5 ± 6 nm exhibited a predominant absorption peak at 290 nm, corresponding to the n to π∗ transition of the oxygen functional groups (C-O) and the free amine functional groups (-NH2). The resulting CDs were then incorporated into cotton and polyester by facile ultrasonication for 1 h. The obtained CD-coated fabrics were first evaluated for their UV-blocking capability and then for their antibacterial properties against two model pathogens: Gram-negative E. coli and Gram-positive S. aureus. Both cotton and polyester showed no UV protection at 280 or 380 nm; conversely, cotton or polyester decorated with CDs exhibited a UV blocking ratio of 82-98%. The CD-coated fabrics showed 100% antibacterial activities against E. coli and S. aureus, whereas the pristine fabrics showed no effect. The CDs/fabrics could adsorb Hg2+and Fe3+, resulting in a drastic fluorescence quenching. As such, this distinct feature was exploited for the removal and detection of these two ions with the limits of detection of 55and 72 μM, respectively. copy; 2022 American Chemical Society.

Original languageEnglish
Pages (from-to)5790-5799
Number of pages10
JournalACS Applied Bio Materials
Volume5
Issue number12
DOIs
StatePublished - 19 Dec 2022

Bibliographical note

Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.

Keywords

  • UV protection
  • and heavy metal sensing
  • antibacterial
  • carbon dots
  • protective fabrics
  • waste utilization

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