Construction of 3D flowers-like O-doped g-C3N4-[N-doped Nb2O5/C] heterostructure with direct S-scheme charge transport and highly improved visible-light-driven photocatalytic efficiency

Visible Light-Driven Sandwich-like g-C3N4-Catalyzed Oxidation to Produce Cumene Hydroperoxide

“…All of the seven synthesized g-C 3 N 4 samples exhibited the typical atomic structure of g-C 3 N 4 , and there were no significant differences in the structure of the samples, indicating that the thermal stripping treatment and ultrasonic stripping process had no effect on the basic atomic structure of g-C 3 N 4 and the conjugated structure of −CN–CN– . In addition, a broad peak was observed in the range from 3500 to 3000 cm –1 in the FT-IR spectra of the catalysts, which corresponded to the existence of free amino N–H and the O–H stretching vibrations. , Furthermore, an additional absorption peak was observed in the range from 1200 to 1600 cm –1 , which corresponded to the typical stretching vibration of the C 6 N 7 ring unit . The absorption peak observed at 1632 cm –1 was attributed to the C–N stretching vibration, and the absorption peaks at 1560 and 1410 cm –1 were attributed to the stretching vibration of the CN heterocyclic ring. , The absorption peaks at 1325 and 1250 cm –1 could be attributed to the tensile vibration of C–N–C, whereas those at 887 and 810 cm –1 corresponded to the N–H-deformed bending vibration of the azine ring unit …”

“…32 In addition, a broad peak was observed in the range from 3500 to 3000 cm −1 in the FT-IR spectra of the catalysts, which corresponded to the existence of free amino N−H and the O− H stretching vibrations. 33,34 Furthermore, an additional absorption peak was observed in the range from 1200 to 1600 cm −1 , which corresponded to the typical stretching vibration of the C 6 N 7 ring unit. 35 The absorption peak observed at 1632 cm −1 was attributed to the C−N stretching vibration, and the absorption peaks at 1560 and 1410 cm −1 were attributed to the stretching vibration of the C�N heterocyclic ring.…”

Environment‐friendly g‐C3N4/SnO2/BiPO4 for enhanced Rhodamine B photocatalysis under visible‐light

“…Generally speaking, the lower the PL peak, the higher the charge hole recombination rate. [ 48 ] As shown in Figure 7, the PL peak of CN/SO/BPO is much lower than that of CN/BPO, indicating that the charge hole recombination rate of CN/SO/BPO is much lower. Although SO/BPO has the lowest PL peak and charge hole rate, it exhibits lower photocurrent compared to CN/SO/BPO due to its lower SPV peak and higher impedance.…”

Design and development of nanostructured photocatalysts for large-scale solar green hydrogen generation

“…35(b)] that showed an excellent hydrogen evolution rate of 2979 mmol g −1 h −1 . Other than hydrogen generation, CO 2 reduction was also followed by a noble S-scheme isotype 3D S-doped g-C 3 N 4 /2D Odoped g-C 3 N 4 heterojunction by Qaraah et al 234 for enhanced production of methane. Moreover, Zhang et al 235 showed an advancement in the S-scheme approach by the construction of a 2D/3D S-scheme heterojunction interface of CeO 2 -Cu 2 O that promotes highly ordered charge transfer for efficient photocatalytic hydrogen evolution.…”