Microwave-assisted rapid green synthesis of photoluminescent carbon nanodots from flour and their applications for sensitive and selective detection of mercury(Ⅱ) ions

摘要

The article reports on the microwave-assisted rapid green synthesis of photoluminescent carbon nanodots (C-dots) with diameters in the range of l-4nm using flour as the carbon source. It suggests that the resultant C-dots exhibit high sensitivity and selectivity toward Hg~(2+) with a detection limit as low as 0.5 nM and a linear range of 0.0005-0.01 μM. The practical use of this system for Hg~(2+) determination in real lake water samples is also demonstrated successfully.