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Issue 22, 2013
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A green and facile approach for the synthesis of water soluble fluorescent carbon dots from banana juice

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Abstract

Green luminescent water soluble oxygenous carbon dots with an average size of 3 nm were synthesized by simply heating banana (Musa acuminata) juice at 150 °C for 4 h without using any surface passivating and oxidizing agent or inorganic salt. The literature was used to propose a possible mechanism for the formation of carbon dots by this approach. The resulting carbon dots exhibited concentration, excitation wavelength and pH dependent luminescent behavior in the visible range. The quantum yield was 8.95 on excitation at a wavelength of 360 nm, using quinine sulfate as the reference. The presence of large amounts of oxygenous functionality was confirmed by FTIR and EDX studies. XRD and TEM illustrated the poor crystalline nature and narrow distribution of these spherical carbon dots. Thus bio-based fluorescent carbon dots with a high yield were reported for the first time through a simple and effective route without using any special apparatus or reagents.

Graphical abstract: A green and facile approach for the synthesis of water soluble fluorescent carbon dots from banana juice

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Article information


Submitted
08 Jan 2013
Accepted
22 Mar 2013
First published
22 Mar 2013

RSC Adv., 2013,3, 8286-8290
Article type
Paper

A green and facile approach for the synthesis of water soluble fluorescent carbon dots from banana juice

B. De and N. Karak, RSC Adv., 2013, 3, 8286
DOI: 10.1039/C3RA00088E

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