Carbon nanodots as a fluorescence sensor for rapid and sensitive detection of Cr(VI) and their multifunctional applications

Hydrothermal synthesis of nitrogen and boron doped carbon quantum dots with yellow-green emission for sensing Cr(vi), anti-counterfeiting and cell imaging

“…Moreover, the lowest detection concentration of Cr 2 O 7 2À was 0.5 mM, which was not comparable to that of the reported nanosensors for Cr 2 O 7 2À (Table S1 †). [20][21][22][23][24] However, the value was much below the allowed lowest concentration in drinking water set by the US Environmental Protection Agency. 21,22 Most importantly, the linear range is much wider than those reported results (Table S1 †), revealing that the NBCQDs have the potential to detect Cr 2 O 7 2À in some practical samples.…”

A novel method for the preparation of solvent-free, microwave-assisted and nitrogen-doped carbon dots as fluorescent probes for chromium(vi) detection and bioimaging

“…Table 1 lists the type of uorescent probe, synthesized methods, solvent used in the reaction, linear range of Cr(VI) detection, LODs and QYs. 29,36,[51][52][53][54][55] Microwave-assisted pyrolysis is a facile and highly efficient method than other synthetic methods due to it time-saving, energy-conserving, cost-effective, and convenient operation. 32 However, many methods have been conducted under hydrothermal conditions, 32,[51][52][53][54] which need longer reaction time and consume more energy than the microwave method.…”

“…32 However, many methods have been conducted under hydrothermal conditions, 32,[51][52][53][54] which need longer reaction time and consume more energy than the microwave method. Although some studies have used the microwave-assisted methods, 29,55 solvent or liquid reagents have been employed in them to dissolve the precursors (Table 1), which are incompatible towards achieving the green and sustainable development. Furthermore, the linear range of the Cr(VI) detection, LODs and QYs for the N-CD uorescent probe in this study were better.…”

Carbon dots based dual-emission silica nanoparticles as ratiometric fluorescent probe for chromium speciation analysis in water samples

“…Compared with other reported Cr(VI) probes based on CDs, this method had a comparable detection limit with higher selectivity. 19,20…”

“…[15][16][17][18] However, only fewer chemosensors for determination of Cr(VI) were reported. [19][20][21][22] Carbon quantum dots (CDs) have extensively been investigated as fluorophores for sensitive and selective detection of heavy metal ions like Cr 6+ , Hg 2+ , and Cu 2+ , [23][24][25][26] as well as species like NO 2 −27 and organic compounds such as glucose tetracycline glyphosate. [28][29][30] This is due to the superior fluorescent properties of CDs combined with their easy preparation and low cost.…”