Nitrogen-doped carbon quantum dots from biomass via simple one-pot method and exploration of their application

Facile synthesis of N, P-doped carbon dots from maize starch via a solvothermal approach for the highly sensitive detection of Fe3+

“…Besides, the peak at about 1340 cm À1 (D band) is related to the vibrations of sp 3 -bonded (dangling bonds) carbon atoms in the peripheral plane of the disordered graphite or glassy carbon. [32][33][34] Therefore, the Raman results suggest that the synthesized N, P-CDs have aromatic graphitic structure with minor surface defects.…”

Near-infrared emissive carbon dots with 33.96% emission in aqueous solution for cellular sensing and light-emitting diodes

“…The intensity ratio of characteristic Raman bands (I D /I G ) can be used to study the structural properties of carbon skeleton, especially the crystallinity and relative abundance of carbon core and surface atoms. I D /I G = 1.5, the possible reason is that the tiny graphitized CDs are embedded in some disordered carbon [57]. 13 C NMR spectra ( Fig.…”

Facile and Efficient Fabrication of Bandgap Tunable Carbon Quantum Dots Derived From Anthracite and Their Photoluminescence Properties

“…The UV-vis absorption spectra of as-prepared CQDs are shown in Figure 6A. It is clear that there are a strong peak and a weak peak at 221 and 298 nm corresponding to π-π * transition of C=C and n-π * transition of C=O, respectively (Dehghani et al, 2018;Yang et al, 2018). Apparently, the shoulder peak at 298 nm is almost invisible in the spectrum of CQDs-N10-Y, indicating that the surface content of COOH is relatively lower in CQDs-N10-Y .…”