A facile microwave-assisted fabrication of fluorescent carbon nitride quantum dots and their application in the detection of mercury ions

Facile fabrication of luminescent organic dots by thermolysis of citric acid in urea melt, and their use for cell staining and polyelectrolyte microcapsule labelling

“…A large number of studies have been devoted to the synthesis of citrate O-dots using urea as a nitrogen source [21,24,26–30]. For instance, highly luminescent O-dots were obtained by hydrothermal treatment of citric acid and urea or thiourea (molar ratio 1:3) solutions, in an autoclave at 160 °C for 4 h [26].…”

“…Hou et al [29] proposed a simple, low-cost, one-pot method to synthesize water-soluble, fluorescent dots through electrochemical carbonization of sodium citrate and urea. Citric acid- and urea-based organic dots were also synthesized by microwave heating at 180 °C, in a solution of oleic acid [30]. It should be noted that all the above-mentioned syntheses were carried out in solutions, (aqueous or non-aqueous), and required special, sophisticated equipment, such as autoclaves and/or microwave setups.…”

Polymer composite fluorescent hydrogel film based on nitrogen‐doped carbon dots and their application in the detection of Hg2+ ions

“…The fluorescent N‐CDs were incorporated into fluorescent hydrogel films, which could be selectively and sensitively quenched in the presence of Hg 2+ . Compared with other reports in the literature, these hydrogel films have a lower detection limit (0.089 mol/L). The optical sensor based on the hydrogel films was successfully applied to determination the presence of Hg 2+ in ‘real’ water samples.…”

Photophysical deactivation behaviour of Rhodamine B using different graphite materials

“…Thus, the lower concentration range can be designated as a static quenching mechanism, whereas at a higher concentration, it was a dual quenching mechanism, i.e., a static, as well as dynamic process, is followed. 31,32 To determine the binding strength, a linear t was applied to the static region of the SV plots ( Fig. 6c and d).…”