Miscanthus grass-derived carbon dots to selectively detect Fe³⁺ ions

Abstract

Fluorescent carbon dots for the selective and sensitive detection of Fe3+ ions with a wide detection range and very low detection limit.

Carbon dots functionalized papers for high-throughput sensing of 4-chloroethcathinone and its analogues in crime sites

“…The Raman spectrum displayed in figure 1c shows the D-band at 1358 cm −1 for the vibrations of carbon atoms with dangling bonds in the termination plane of disordered graphite or glassy carbon, as well as the G-band at 1572 cm −1 for the in-plane stretching of sp 2 carbon in the rings. Their intensity ratio (I D /I G ) is 0.8, which is similar to the most reported C-dots, supporting C-dots containing sp 2 (core) and sp 3 (surface) hybridized carbons [34][35][36][37]. Like most reported C-dots [28,[38][39][40][41], the as-prepared C-dots exhibit interesting excitation-wavelength-dependence emission properties when excited at wavelengths ranging from 300 to 420 nm, as shown in figure 1d [42].…”

Acetone-derived luminescent polymer dots: a facile and low-cost synthesis leads to remarkable photophysical properties

“…The absence of graphitized structures was further conrmed by Raman spectroscopy: the spectra did not show any of the peaks characteristic for sp 2 -hybridized carbon domains and located at around 1340-1360 cm À1 (the D-band), and 1560-1590 cm À1 (the G-band). 16,45,54,67 The chemical groups present in PDs have been further identied using ATR-FTIR and TR-FTIR spectroscopies ( Fig. 1f and S5, S6 †).…”

“…Although they can generally follow either top-down or bottom-up routines, 1,[38][39][40][41] bottom-up approaches attract increasing interest, due to the versatility of potential carbon precursors and to the possibility to modify CDs chemical composition by using heteroatom-containing doping agents. A variety of commercial and natural precursors were already tried, like starch, 3,42 gelatin, 43 grass, 44,45 banana and orange juices, 46 bread, 47 chocolate, 8 meat, 48 soy milk, 49 instant coffee, 17 black tea, 50 beer, 51,52 and egg white. 53 While such attempts are a priori interesting, the natural materials suffer from their heterogeneity, unknown impurities, and oen unknown chemical composition that is strongly affected by uncontrolled factors (e.g.…”

Tunable multicolour S/N co‐doped carbon quantum dots synthesized from waste foam and application to detection of Cr3+ ions

“…Therefore, it is extremely necessary to achieve effective detection of heavy metal ions without har- Miscanthus grass-derived carbon dots. [29] Chauhan and colleagues achieved an excellent fluorescence response from CQDs for detection of dual metal ions, Cd 2+ and Cu 2+ , in aqueous medium. [30] Wang and colleagues produced photoluminescent CQDs for the antiinterference detection of Hg 2+ in tap water and in living cells.…”