A Flourcent Prob Based on Carbon Dots for Selective and Sensitive Detection of Bismuth(III) in Various Water Samples

Fluorescent carbon dots (CDs) have attracted tremendous attention because of their ease of preparation, good water solubility, low toxicity, satisfactory fluorescent performance, and resistance to photobleaching, as well as their potential applications in sensing, biological labeling, photocatalysis, and so on [1]. The metallic ions are readily absorbed into human bodies and get accumulated because of their non-biodegradable and bio-accumulative property. This can result in a variety of damages to the human brain, the heart and the kidneys and even permanent damage to the central nervous system and the other organs [2]. In this study CDs was synthesized from sucrose and applied as a sensitive fluorescence probe for detection of bismuth ions (Bi 3+) [3]. To examine the most important parameters including volume of CDs, pH of the solution, ulterasonic time and concentration of salt and their interactions on the fluorescence intensity, a four factor central composite design (CCD) combined with response surface modeling (RSM) was implemented [4]. Finally, the proposed fluorescence prob based on CDs was successfully applied for the sensitive and selective detection of Bi (III) in various water samples. Must importantly, the suggested prob was enviormentaly friendly and showed good figures of merit for determination of Bi (III).