Water-soluble ribbon-like graphitic carbon nitride (g-C₃N₄): green synthesis, self-assembly and unique optical properties

Abstract

Water-soluble ribbon-like g-C3N4 and various special assemblies were obtained from dicyandiamide using NaCl crystals as a hard template.

Reduced-sized monolayer carbon nitride nanosheets for highly improved photoresponse for cell imaging and photocatalysis

“…4c). The wider bandgap of NMGCNs is ascri-bed to the QCE arising from the small lateral size and monolayer structure [37]. In order to verify this deduction, we tested the Mott-Schottky plots by electrochemical method in detail.…”

“…Compared with GCNNs (Fig. 3a), the (002) peak at about 27.5°is much weaker and broader, and the (100) peak at 13.2°has disappeared, indicating that the stacking of the conjugated aromatic systems and the in-plane repeat units of GCN are obviously disrupted after the exfoliation [20,26,37]. A Fourier transform infrared (FTIR) spectrum measurement was conducted to verify the chemical structure of the NMGCNs.…”

g-C3N4-Based Nanomaterials for Visible Light-Driven Photocatalysis

“…The ribbon-like g-C3N4 emits blue light at around 440 nm under 365 nm excitation, whereas bulk g-C3N4 exhibited a broad emission spanning 460-520 nm, i.e., yellowgreen light. Unfortunately, these ribbon-like g-C3N4 nanostructures have not yet been tested for as Ribbon-like g-C 3 N 4 nanostructures have been prepared employing dicyandiamide (DCDA) and NaCl crystals as structure-directing agents [77], with a possible mechanism shown in Figure 11. These ribbon-like g-C 3 N 4 nanostructures exhibit interesting optical and electronic properties, including a large blue shift in their absorption spectrum corresponding to an increased band gap from 2.7 eV to 3.0 eV.…”

“…g-C3N4 nanotubes can also be obtained through rolling-up nanosheets via a simple water-induced morphological transformation [76], avoiding the use of organic solvents and hence promoting green chemical principles. Ribbon-like g-C3N4 nanostructures have been prepared employing dicyandiamide (DCDA) and NaCl crystals as structure-directing agents [77], with a possible mechanism shown in Figure 11. These ribbon-like g-C3N4 nanostructures exhibit interesting optical and electronic properties, including a large blue shift in their absorption spectrum corresponding to an increased band gap from 2.7 eV to 3.0 eV.…”

“…Ribbon-like g-C3N4 nanostructures have been prepared employing dicyandiamide (DCDA) and NaCl crystals as structure-directing agents [77], with a possible mechanism shown in Figure 11. These ribbon-like g-C3N4 nanostructures exhibit interesting optical and electronic properties, including a large blue shift in their absorption spectrum corresponding to an increased band gap from 2.7 eV to 3.0 eV.…”