Structuring phase junction between tri-s-triazine and triazine crystalline C3N4 for efficient photocatalytic hydrogen evolution

Phosphorus‐doped Isotype g‐C3N4/g‐C3N4: An Efficient Charge Transfer System for Photoelectrochemical Water Oxidation

“…Additional weak peaks are observed for the samples after being annealed with PH 3 at the temperature higher than 420 °C. The peaks may arise from the side reaction of g‐C 3 N 4 and has been found in those of g‐C 3 N 4 prepared in oxygen‐deficient atmosphere . The FTIR spectrum is also collected to characterize the functional group of samples with and without PH 3 annealing.…”

Crystalline Carbon Nitride Semiconductors for Photocatalytic Water Splitting

“…[42] Thea s-prepared sample exhibited high activity towards photocatalytic hydrogen evolution. [43] TheX RD pattern exhibited two groups of diffraction peaks,b elonging to PTI and heptazine-based CCN.This was further confirmed by the HRTEM analysis,in which the phase junction was composed of well-matched lattice fringes between the (002) planes of triazine-and heptazine-based CCNs (Figure 16 b). As described above,t he direct heating of triazine-based precursors in molten salt typically forms CCNs with triazine subunits while heptazine-based CCNs can be formed by using melon-based CN as the heptazine-based precursor.Therefore,aCCN with both triazine and heptazine subunits was obtained by Zeng and co-workers in at wo-step synthesis.…”

“…As described above,t he direct heating of triazine-based precursors in molten salt typically forms CCNs with triazine subunits while heptazine-based CCNs can be formed by using melon-based CN as the heptazine-based precursor.Therefore,aCCN with both triazine and heptazine subunits was obtained by Zeng and co-workers in at wo-step synthesis. [43] TheX RD pattern exhibited two groups of diffraction peaks,b elonging to PTI and heptazine-based CCN.This was further confirmed by the HRTEM analysis,in which the phase junction was composed of well-matched lattice fringes between the (002) planes of triazine-and heptazine-based CCNs (Figure 16 b). Owing to the increased crystallinity and the accelerated charge separation, the triazine/heptazine-based CCN showed improved photocatalytic activity over melon-based CN and PTI, as well as the heptazine-based CCN.…”

Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications

“…Nevertheless, Zeng et al have identified that an effective photocatalytic HER might be achieved through structural engineering of the phase junction between triazine‐based crystalline carbon nitride (tri‐C 3 N 4 ) and tri‐s‐triazine‐based crystalline carbon nitride (tri‐s‐tri‐C 3 N 4 ). In fact, the tri‐C 3 N 4 composite is vertically aligned on the surface of tri‐s‐tri‐C 3 N 4 , which is crucial for achieving a photocatalytic H 2 evolution activity of 144 µmol h −1 , which is 30‐fold higher than that of pristine g‐C 3 N 4 .…”

“…By doing so, one can design a material with improved electronic, optoelectronic, and catalytic properties . Much of that role is likely to be filled by SPE techniques, which could help potentially realize improved electrocatalytic, photoelectrocatalytic, photocatalytic, and environmental degradation performance in the context of desired products. Additionally, SPE techniques appear to have facilitated a much more fundamental understanding, especially in energy conversion, from water splitting to carbon dioxide reduction to environmental pollutant treatments.…”