g-C3N4

Materials

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662g-C3N4nmSEMThe SEM images in Fig. 4 show the morphological and structural differences between PCN and CCN. PCN exhibited a fluffy-like structure with a small and irregular dense-texture as compared to CCN texture. These fluffy nanosheets were connected in such a way that they have left a small hollow space between them. In comparison, CCN exhibited a uniform surface texture, and g-C3N4 crystalline sheets were looked like large-sized aggregates.89.9,11.8A summary of the comparison of the specific surface area (SBET), total pore volume, and pore width of PCN and CCN are listed in Table 2. PCN exhibited greater SBET (89.9 m2/g) than that of CCN (11.8 m2/g). This enlarged surface area can be attributed to porous, thin, and curled nanosheets in fluffy PCN as compared to crystallized, planar, and large layered nanosheets of CCN.
678g-C3N4200nmTEMTEM (Fig. S2A) and DLS (Fig. S2E) indicate that g-C3N4 nanosheets are nanoflakes with an average size of 200 nm.

Kinetics

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40g-C3N4OXDTMB0.31mM14.49-8M/s4040
40g-C3N4PODH2O22.11mM8.79-8M/s4040
678g-C3N4678
662g-C3N4POD0.159mM1.3-8M/s662

Applications

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678g-C3N4analyzing biological fluids.Fluor1μM
662g-C3N4detection of H2O2H2O2Fluor90-2500nM73nM

References

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662Graphitic carbon nitride for efficient fluorometric quenching bioassay of hydrogen peroxide: Effect of structure on Propertieshttps://doi.org/10.1016/j.jphotochem.2020.112731CarbonSo, metal-free nanostructures of g-C3N4 were synthesized and characterized through different techniques.
678A triple-channel sensing array for protein discrimination based on multi-photoresponsive gC 3 N 4https://doi.org/10.1007/s00604-020-04396-3CarbonIn this work, therefore, a novel three-dimensional optosensing device based on the g-C3N4 nanosheets is constructed for rapid and sensitive discrimination and identification of proteins (Scheme 1).