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Green one-pot preparation of carbon dots (CD)-embedded cellulose transparent film for Fe3+ indicator using ionic liquid

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Abstract

In this study, carbon dots (CD)-embedded film was successfully fabricated for Fe3+ sensing via a one-pot process. The carbon dots for Fe3+ ion detection were synthesized using the cellulose/ionic liquid solution for different treatment times. With the increase of the treatment time, the N-doped graphitic structure in the core and the functional groups on the surface were highly developed in the carbon dots. The properties and structures of the carbon dots were characterized using TEM, UV–Vis spectroscopy, XPS, IR, TCSPC, and PL spectroscopy. The carbon dots prepared by 12 h treatment showed a high quantum yield of 28.4%, and the superior stability for long-term storage, UV exposure, ionic strength, and pH change. The carbon dots in the film, as well as in the aqueous dispersion, revealed highly selective detection toward Fe3+. The CD-embedded cellulose film can be used as a Fe3+ indicating film with good reusability, outstanding transparency, and high photostability.

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Acknowledgments

This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science (NRF-2018R1A2B6003570).

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  1. Jeongyeon Woo and Younghan Song have contributed equally to this work.

Authors and Affiliations

  1. Department of Organic and Nano System Engineering, Konkuk University, Seoul, 05029, Republic of Korea

    Jeongyeon Woo, Younghan Song, Jungbin Ahn & Hyungsup Kim

  2. Division of Chemical Engineering, Konkuk University, Seoul, 05029, Republic of Korea

    Hyungsup Kim

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  1. Jeongyeon Woo
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Woo, J., Song, Y., Ahn, J. et al. Green one-pot preparation of carbon dots (CD)-embedded cellulose transparent film for Fe3+ indicator using ionic liquid. Cellulose 27, 4609–4621 (2020). https://doi.org/10.1007/s10570-020-03099-5

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