Akademik Veri Yönetim Sistemi
Surfaces and Interfaces, cilt.74, 2025 (SCI-Expanded)
This study presents the hydrothermal synthesis of nitrogen- and sulfur-co-doped carbon quantum dots (CQDs) using Succinic Acid and L-cysteine as carbon and dopant sources, respectively. The synthesized CQDs exhibited photoluminescence, high water solubility, and functionalized surfaces, as confirmed by FTIR, XRD, STEM, DLS, and XPS analyses. These CQDs were employed as fluorescent probes for the selective and sensitive detection of Hg²⁺ ions. Among these, Hg²⁺ showed the strongest quenching effect with a detection limit of 2.37 × 10–7 mol L-1, attributed to electron transfer between Hg²⁺ ions and surface functional groups. Notably, the sensor was tested on environmental water samples. The CQDs also showed measurable responses to Hg²⁺, confirming their broader metal ion sensing capability. These findings demonstrate that L-cysteine/succinic acid based carbon quantum dots are promising candidates for the environmentally friendly monitoring of Hg²⁺ ions pollution in legacy environmental water samples.