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.
|Number of pages||10|
|Journal||ACS Applied Bio Materials|
|State||Published - 19 Dec 2022|
Bibliographical noteFunding Information:
We would like to thank the HORIZON Europe program for providing funding to carry out this study (grant no. 101058426). We thank Karunya Institute of Technology and Sciences for the measurement of absorbance, transmission, and photoluminescent properties of the fabrics.
© 2022 American Chemical Society. All rights reserved.
- UV protection
- and heavy metal sensing
- carbon dots
- protective fabrics
- waste utilization