Sintesis Dan Karakterisasi Nitrogen-Doped Carbon Dots (N-CDs) Berbasis p-Aminofenol Melalui Metode Hidrotermal

Abstract

The development of nanotechnology encourages the search for new nano-sized functional materials with good optical properties and high biocompatibility. One of the materials that meets these criteria is carbon dots (CDs), which are carbon-based nanomaterials with particle sizes below 10 nanometers that can be synthesized from biomass and organic materials. This study aims to synthesize and characterize Nitrogen-doped Carbon Dots (N-CDs) with p-Aminophenol and ethylenediamine (EDA) precursors as nitrogen dopants through a hydrothermal method. The synthesis of N-CDs was carried out at a temperature of 180oC for 12 hours. Tests with 395 nm UV light produced yellowish green luminescence and the results of UV-Vis analysis showed two absorption peaks at wavelengths around 252–297 nm and 406–409 nm, indicating the presence of π–π* and n–π* transitions. Photoluminescence analysis produced two emission peaks at wavelengths of 370 and 510 nm. FTIR analysis confirmed the presence fungicide groups of O-H/N-H, C-N, C=C, C-O, and C=O. TEM analysis showed an average particle size distribution of 4.94 nm. XRD analysis showed a peak at 2θ- 22.5o and Raman analysis showed peak D at 1337 cm-1 and G at 1566 cm-1 with an intensity ratio of ID/IG of 0.8.