Berlin 2024 – scientific programme

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O: Fachverband Oberflächenphysik

O 33: Poster: Supported Nanoclusters and Catalysis

O 33.4: Poster

Tuesday, March 19, 2024, 18:00–20:00, Poster C

Fluorescence Carbon dots (CQDs) produced via hydrothermal carbonization incorporated in Graphene Oxide layers — •Daniel Saavedra¹, Marcelo A. Cisternas², Donovan E. Diaz-Droguett¹, and Ulrich G. Volkmann¹ — ¹Instituto de Física, Pontificia Universidad Católica de Chile, Santiago, Chile — ²Escuela de Ingeniería Industrial, Universidad de Valparaíso, Santiago, Chile

Carbon quantum dots (CQDs) have received increasing attention due to their excellent photostability, low toxicity, tunable fluorescence performance [1], high extinction coefficient and brightness. In this study, carbon dots were prepared by carbonization of chitosan via hydrothermal carbonization method [2]. To improve the stability, graphene oxide synthesized by the Hummer method was incorporated. The obtained CQDs were characterized by various techniques including FTIR, AFM, TEM, UV-Vis and fluorescence spectroscopy. The results obtained are aimed at incorporating carbon dots into nanostructured surfaces to enhance hydrogen production by photocatalytic water splitting. Acknowledgements: ANID Ph.D. Fellowship (DS). References: [1] Wu, Q, et al. (2023), Nano Research, 16(2), 1835-1845. [2] Zattar, A. P. P., et al. (2021), Nanotubes and Carbon Nanostructures, 29(6), 414-422.

Keywords: Carbon quantum dots (CQDs); Chitosan; Nanostructured surfaces; Photocatalytic water splitting; Green Hydrogen