Methyl orange-derived carbon dots for light-emitting-diode and fluorescent electrospun nanofibers

Carbon dots (CDs) have gained tremendous attention over a wide range from fluorescence sensors to optoelectronic devices. In this context, N, S-codoped carbon dots (MO-CDs) of 2.7 nm were synthesized via a facile hydrothermal method using a single precursor Methyl Orange (MO). Upon excitation at 430 nm, the MO-CDs exhibit a yellow emission with an absolute quantum yield (QY) of 15.3%. In addition, the as-prepared MO-CDs possess excellent resistance to high ion strength, high H2O2 concentration, and UV exposure. Because of their good fluorescence properties, a light-emitting diode (LED) device that emits yellow light was fabricated by mixing MO-CDs and siloxane. Moreover, the electrospun nanofibers with yellow fluorescence were prepared by electrospinning technology. This work shows that the CDs derived from MO possess special fluorescent characteristics, which can be utilized as a multifunctional carbon material.