Tunable carbon quantum dots from starch via microwave assisted carbonization
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Date
2017
Authors
Adams, L.A.
Fagbenro-Owoseni, Kafayat
Journal Title
Journal ISSN
Volume Title
Publisher
UniMAP Press
Abstract
Tunable luminescence carbon dots (C-dots) were prepared through microwaveassisted carbonization of aqueous starch suspension mediated by sulfuric and phosphoric
acids respectively as surface passivating agents. The as-prepared C-dots showed green, blue
and yellow luminescence under 365nm UV light. The C-dots were further characterized by
UV-Vis, FTIR, and band gap determination. Fourier transform infrared spectroscopy (FTIR)
studies revealed bands at 3460 cm-1 (OH), 2979 cm-1 1708 cm-1 (C=O), 1188 and 1040cm-1
(C-O), and 1397 cm-1 (C=C) indicative of the graphitic nature of the carbon. The UV-Vis
showed blue shifted absorption bands, while the band gap calculated revealed narrow sizing
of the C-dots in the semiconductor range. The results suggest that this approach may serve
as a facile route to colour tunable photoluminescent C-dot materials with potential
biological applications
Description
Keywords
Carbon quantum dots , Semiconductor , Starch , Microwave , Luminescence
Citation
Adams, L. A., & Fagbenro-Owoseni, K. A. (2017). Tunable carbon quantum dots from starch via microwave assisted Carbonization. Int. J. Nanoelectronics Mater, 10, 11-20.