Green and Selective Fluorescent Sensor for Detection of Sn (IV) and Mo (VI) Based on Boron and Nitrogen-Co-Doped Carbon Dots.

A green and simple microwave-assisted method was used to synthesis water-soluble boron and nitrogen-co-doped carbon dots (B-N-CDs). These B-N-CDs were successfully used for the fluorescent determination of Sn4+ and Mo6+ ions. This probe had a fast response time at pH = 4 with high sensitivity and selectivity. Linear correlation between F0/F and the concentration was seen in the range of 0.2-18 μM and 0.2-25 μM for Sn4+ and Mo6+, respectively. Under optimum condition, the limit of detection (LOD) for Sn4+ and Mo6+ were 150 nM and 132 nM, respectively. The performance of the sensor was evaluated by different real samples such as tap, river and mineral water, canned fish sample and tomato samples.