Chemical and Physical Stability of Carbon Quantum Dots Synthesized from Mahonia aquifolium

OpenAlex İngilizce

Carbon quantum dots (CQDs) are among the most popular carbon-based nanomaterials of recent years due to their low toxicity, eco-friendly nature as opposed to chemically derived carbon nanomaterials, high biocompatibility, easy water solubility, short synthesis time, low cost, and tunable fluorescence properties. In this study, quantum dots were synthesized by the hydrothermal method using Yellow Paint Bush (Mahonia aquifolium) and citric acid as carbon sources. The synthesized CQDs were characterized by using Fourier-transform infrared spectroscopy (FT-IR), photoluminescence spectroscopy (PL), UV–Vis spectroscopy, X-Ray diffraction (XRD), and thermal analysis (TG/DTA/DTG). Stability of carbon quantum dots (on the 1st, 5th, 10th, 15th, 20th and 30th days) were investigated in the refrigerator, at room conditions, in the dark, and moreover in the UV cabinet at 365 nm wavelength (between 0 and 30 minutes and 1-7 hours) and pH (pH=5-12) dependent emission properties.