Photocatalytic water splitting to simultaneously produce H2 and H2O2 by two-electron reduction process over Pt loaded Na+ introduced g-C3N4 catalyst

Simultaneous Dual-Functional Photocatalysis by g-C3N4-Based Nanostructures

“…Thus, in simultaneous production of H 2 O 2 and H 2 from water splitting, there is a competition between O 2 and H + because both need to consume the electrons of the conduction band. Recently, Liang et al prepared Pt-loaded Na + -doped g-C 3 N 4 for simultaneous production of H 2 and H 2 O 2 from water splitting . Pt-loaded g-C 3 N 4 promotes reduction of H + to H 2 molecules in the conduction band, while Na + doping tunes the CB and VB positions of the g-C 3 N 4 .…”

Enhanced photocatalytic activity of brown H4Nb6O17/g-C3N4 composite for visible-light driven H2O2 production

“…Additionally, the profile of the composite clearly inherited the major peak associated with the sp 2bonded carbon of the s-triazine rings in g-C 3 N 4 (N-CQN). 30 The N 1s spectra of both g-C 3 N 4 and H 4 Nb 6 O 17 (ann)/g-C 3 N 4 are deconvoluted into three peaks, shown in Fig. 7d.…”

Surface Physicochemistry Modification and Structural Nanoarchitectures of g‐C3N4 for Wastewater Remediation and Solar Fuel Generation

“…Similar observations were noted for Na-doping. [124,125] The effect of alkali metal dopants (Li, Na, K, and Rb) prepared by water bath heating and hightemperature calcination method was evaluated, and the results show that Rb doped g-C 3 N 4 exhibited the best optical performance with increased wavelength to 500-1100 nm and narrowest bandgap (2.0 eV) compared to other studied photocatalysts, agreed with the UV-vis spectrum. [126] The use of anionic polyacrylamide (APAM) as a carbon-doping source had improved the light absorption capability of g-C 3 N 4 nanosheet by banggap narrowing, as displayed in Figure 8c-f.…”

“…[166] Meanwhile, Liang et al reported the superior stability of Pt-loaded Na + doped g-C 3 N 4 (Pt/NaCN) after four cycles of reaction without sacrificial reagent with 900 µmol h -1 g -1 of hydrogen production rate. [125] The presence of Na + formed the N-bridge in C-N rings, which further improved the g-C 3 N 4 in terms of promotion of the specific surface area, prevention of crystal growth, enhancement of visible light absorption, and higher electron-hole separation efficiency. Significantly, the doping of Na + helped to tune CB and VB to the most appropriate positions, which is a crucial factor for the production of hydrogen via photocatalytic water splitting.…”