A convenient method for isolating carbon quantum dots in high yield as an alternative to the dialysis process and the fabrication of a full-band UV blocking polymer film

Periyayya Uthirakumar, M. Devendiran, Tae Hwan Kim, In-Hwan Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)


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 languageEnglish
Pages (from-to)18312-18317
Number of pages6
JournalNew Journal of Chemistry
Issue number22
Publication statusPublished - 2018 Jan 1


ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry

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