Synthesis of highly luminescent carbon dots from postconsumer waste silk cloth and investigation of its electron transfer dynamics with methyl viologen dichloride

• Published in: Journal of the Indian Chemical Society Vol. 98; no. 11; p. 100181
• Main Authors: Vadivel, Ramanan, Nirmala, Muthukumaran, Raji, Kaviyarasan, Siddaiah, Bommana, Ramamurthy, Perumal
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-11-2021
• Subjects: Dynamic quenching; Hydrothermal synthesis; Stern-Volmer analysis; Stern-Volmer analysis; Hydrothermal synthesis; Dynamic quenching
• ISSN: 0019-4522
• DOI: 10.1016/j.jics.2021.100181

Synthesis of luminescent carbon dots (CDs) from biological waste materials is gaining more attention in the present-day scenario. We have synthesized highly luminescent (luminescence quantum yield, φ ​= ​19.1%), water-soluble CDs from a postconsumer waste silk cloth via a facile hydrothermal synthetic method. The resulting CDs are characterized and their photophysical properties are studied in detail. The electron transfer dynamics of CDs in presence of methyl viologen dichloride hydrate (MV2+) is systematically investigated in this work. Knowledge of the electron transfer dynamics of CDs is essential in the structural elucidation of CDs, prediction of sensing mechanisms and utilizing the CDs in energy storage devices.
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•Luminescent CDs are derived from post-consumer waste silk fabrics, a biological waste material.•The fluorescence quantum yield of these CDs is relatively higher, ∼11% compared with other bio source-derived CDs.•The electron transfer dynamics of CDs with MV2+ is thoroughly investigated.