Carbon dots derived from Poria cocos polysaccharide as an effective “on-off” fluorescence sensor for chromium (VI) detection

Facile fabrication of an Au/Cu bimetallic nanocluster-based fluorescent composite film for sensitive and selective detection of Cr(vi)

“…The average recoveries of Cr( vi ) in lake water, bottled mineral water, and laboratory tap water were 99.44%–104.93%, 94.73%–104.16%, and 98.53%–102.32%, respectively, and the relative standard deviations ( n = 3) of Cr( vi ) detection could be controlled below 0.8%, indicating that the probe has good accuracy and reproducibility. 54,55 The above experimental data show that the DPA-Au/Cu NCs@CS fluorescent composite film can be used for the detection of Cr( vi ) in actual water samples, and we believe that the DPA-Au/Cu NCs@CS fluorescent composite film has good application prospects for the detection of Cr( vi ) in aqueous solutions.…”

Cellulose-based fluorescent films with anti-counterfeiting and UV shielding capabilities enabled by enamine bonds

“…The fluorescence of CAA-PEA x can be quenched by the introduction of Cr( vi ) possibly due to the electron transfer process under UV light. 36,37 Different security information can still be clearly expressed (Fig. S9, ESI†).…”

Humic Acids Affect the Detection of Metal Ions by Cyanobacteria Carbon Quantum Dots Differently

“…Moreover, the FL intensity of the produced CQDs depended on pH values in the range of 4 to 9 ( Figure S2D ). Effects of pH on FL intensity of CQDs can be ascribed to protonation and deprotonation of functional groups such as C=O, O–H, and various N-doped functional groups on the surface of CQDs [ 36 , 37 , 38 ]. In alkaline conditions, the fluorescence intensity of CQDs can be ascribed to the oxidation of C-O functional groups [ 39 ].…”