| 초록 |
Copper is an essential transition metal for all organisms because it is necessary for a large variety of enzymes that are important in metabolic processes. Besides, the development of an analytical method for the sensitive and selective determination of Cu2+ is very important for the environment and biological systems. In this work, water-soluble fluorescent carbon dots were synthesized from celery stalks by a one-step, low-cost hydrothermal process. The prepared CDs had average sizes of 3.7 nm, and they emitted strong blue photoluminescence (PL). The surface functional group and state were investigated via FTIR and XPS. The blue fluorescence of the as-prepared CDs was effectively quenched by Cu2+ ions compared to other competing metal ions. So, these CDs provide promising probes for fluorescence detection of Cu2+. Moreover, a linear relationship was obtained between the relative fluorescence intensity and the concentration of Cu2+ ions with a linear detection range of 0 to 100 µM. |
