Study of the Photophysical Properties of Carbon Dots Derived from Banana Peels From Different Cities Used to Produce Ink and Film Fluorescence

Abstract

In this study, carbon dots (CDs) were synthesized via microwave, using precursor banana peel extract from different cities (Maceió and Aracaju) to evaluate their optical and structural properties. In addition, the volumes of the extract were varied for laboratory scale-up tests. DLS analyses showed that the most significant size frequencies for all CDs were less than 10 nm. UV-Vis and FTIR absorption spectra indicated the presence of aromatic groups and heteroatoms. In addition, the CDs showed excitation wavelength-dependent emission, with maximum intensities at 457 nm. The results indicate the high robustness of the method and its potential application in the production of fluorescent films and inks.