Abstract
The first shikimic acid derived fluorescent carbon dots (SACNDs-FITC) for multi-modal detection and simultaneous removal of Hg2+ is revealed. The fluorescence of SACNDs-FITC centered at 520nm can be selectively quenched by Hg2+, while the emission centered at 420nm remains constant which can be used for self-calibration. Naked-eye distinguishable color change from yellow to colourless under daylight and from green to blue under UV light could be observed for SACNDs-FITC in the real-time detection of Hg2+. Novel approaches that combine smartphone automated color hue (RGB and HSV) readout for intelligent Hg2+ analysis was developed. Moreover, SACNDs-FITC could work as an effective absorbent for Hg2+ with an adsorption capacity of 19.24mg/g. Mechanism studies revealed the success of the post-modification strategy and the crucial role of -NCSN- groups in detecting and adsorbing Hg2+. Most importantly, multi-modal analysis of Hg2+ in celery cabbage and apples was performed using this analytical platform.
Published Version
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