Abstract
We introduce a facile and convenient method to isolate more than 80% carbon quantum dots (CQD), for the first time. The proposed method substitutes a lengthy conventional dialysis process. An organic solvent, n-butanol is used to extract CQD in a high yield with the cumulative particle size distribution at 2.6 nm. The polymer films were fabricated as a function of increasing content of CQD, and shielded full-band UV light. It is found that the presence of surface functional groups in the CQD creates a high level of dispersion in the polymer matrix and it can block >99% of UV light with just 10 mg of CQD. A plausible mechanism is proposed to explain the superior UV shielding properties of the polymer film and is confirmed by protection of a photo-degradable model dye. Due to being non-toxic and environmentally friendly, the CQD dispersed polymer film could be a promising material in the food packaging industry to protect UV sensitive foods.
| Original language | English |
|---|---|
| Pages (from-to) | 18312-18317 |
| Number of pages | 6 |
| Journal | New Journal of Chemistry |
| Volume | 42 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 2018 |
Bibliographical note
Funding Information:This research was encouraged by the management of Sona College of Technology and financially supported by the BK21 plus project in 2018, the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (KRF-2017R1A2B3006141).
Publisher Copyright:
© The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
ASJC Scopus subject areas
- Catalysis
- General Chemistry
- Materials Chemistry