Dependence of electronic structure of g-C 3 N 4 on the layer number of its nanosheets: A study by Raman spectroscopy coupled with first-principles calculations

Defective graphitic carbon nitride synthesized by controllable co-polymerization with enhanced visible light photocatalytic hydrogen evolution

“…The 705 and 987 cm -1 peaks are corresponded to the breathing modes of triazine ring, [31][32][33][34] where the peak of 1238 cm -1 is assigned to the =C (sp 2 ) bending vibration. 35 When comparing the Raman spectrum of the pristine with modified g-C 3 N 4 samples, two obvious spectral features are observed. The first is that CN-DT and CN-DMT show nearly identical Raman shifts with g-C 3 N 4 , suggesting the CN-DT or CN-DMT maintain the similar structure with g-C 3 N 4 .…”

Tunable Bandgap Energy and Promotion of H2O2 Oxidation for Overall Water Splitting from Carbon Nitride Nanowire Bundles

“…[ 10a ] However, 2D g-C 3 N 4 , which is dominated by van der Waals forces, is more likely to form stacked layered structures, resulting in poor electronic characteristics that inhibit its effectiveness to a certain extent. [ 11 ] For example, g-C 3 N 4 has been observed to exhibit suffi cient redox capacity for overall water splitting under visible light, while the apparent quantum effi ciency (QE) of 2D g-C 3 N 4 for H 2 or O 2 production cannot exceed 4% because of the rapid recombination of electron-hole (e − -h + ) pairs. [ 12 ] In addition to the poor photocatalytic activity, the g-C 3 N 4 has demonstrated a two-electron favored charge exchange in the electroreduction of O 2 , [ 13 ] as well as the distinct H 2 O 2 generation during the photocatalytic H 2 generation.…”

Graphene-like g-C3N4 nanosheets/sulfur as cathode for lithium–sulfur battery

“…For GCN, the ratio of peak heights of 756-706 cm -1 (I756/I706) increases and the peak at 1239cm -1 is blue shifted to 1251cm -1 . These two futures indicate the GCN with few layers has been prepared successfully [50]. The graphene-like structure of GCN is also proved by transmission electron microscopy (TEM) (Fig.…”