Synthesis and Characterization of the Nano Materials Carbon Dots and Graphene Quantum Dots using Plant Derived Natural Sources

Abstract

The green and sustainable synthesis of carbon dots (CD) attains many researchers attention with their various applications and environmentally friendly production methods. The material s primary attributes, such as its exceptional optical properties with high quantum yields and long photoluminescence decay lifetimes, its cost-effective preparation methods using easily accessible raw materials and simpler techniques, its compatibility with biological systems and its ability to be structurally functionalized according to specific needs, have established it as the preferred material in numerous modern research fields. This work introduces a new method for producing carbon dots (CD) by utilising date seed extract as a renewable source of carbon. The synthesisation of Carbon Dots is done with a straightforward one-pot hydrothermal technique, eliminating the need for hazardous chemicals and energy-demanding procedures. The characteristics of the synthesised CD were analysed using several techniques that includes transmission electron microscopy (TEM), Raman spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, UV-visible spectroscopy and photoluminescence spectroscopy. The TEM examination showed that the CD displayed a sphere-shaped morphology having a consistent size that ranges from 20 to 40 nm. The Raman spectroscopy analysis verified the existence of sp2 carbon, indicating the presence of a structure similar to graphene. FTIR examination revealed the existence of specific groups of CDs based on its functional property. The UV-visible spectroscopy exhibited significant absorption within the visible range, suggesting their potential for applications involving photoluminescence. The photoluminescence newlinex newlinespectroscopy additionally demonstrated their adjustable emission characteristics. Using an environmentally friendly method to produce CD extract provides a sustainable and renewable approach for manufacturing nanomaterials, hence encouraging environmental accountability.