Novel P O codoped g-C3N4 with large specific surface area: Hydrothermal synthesis assisted by dissolution–precipitation process and their visible light activity under anoxic conditions

Characterization of urea derived polymeric carbon nitride and resultant thermally vacuum deposited amorphous thin films: Structural, chemical and photophysical properties

“…Two pronounced peaks were observed at 27.47 and 13.13° in p-CN diffraction pattern corresponding to the interlayer stacking peak of aromatic systems and the in-plane structural packing motif of tri-s-triazine units [36], respectively, which is in consistence with the reported p-CN derived from thermal decomposition of urea [8,33,34]. It is important to note that very similar diffraction patterns with practically identical peak positions were obtained via thermal treatment (temperature range of 520-550 ºC) of melamine [23,25,26,56] and dicyandiamide [11,13,16,18] as source materials. The initial molecular structure of p-CN was reconstructed from [44].…”

“…The p-CN only consists of abundant elements in a tri-s-triazine ring structure as elementary building block. It can be synthesized via a straightforward and scalable process from relatively cheap source materials such as dicyandiamide [10][11][12][13][14][15][16][17][18], cyanamide [19], ammonium thiocyanate [20], melamine [21][22][23][24][25][26][27][28][29][30], urea [8,9,[31][32][33][34][35][36], thiourea [28], guanidine carbonate [37] and thiosemicarbazide [38]. Generally, synthesis methods of p-CN involve thermal treatment of precursor material in the temperature range of 450-650 °C.…”

Review on DFT calculation of s‐triazine‐based carbon nitride

“…Lots of experimental research revealed that multielement codoping also benefitted the photocatalytic rhodamine B degradation and H 2 production performance of g-C 3 N 4 . [79][80][81] In the aspect of DFT calculation, the effect of B and P codoping on the electronic and optical properties of g-C 3 N 4 has been examined. 68 Two impurity atoms, ie, B and P were placed at the C and interstitial sites, respectively.…”

Heteroatom‐Doped Carbonaceous Photocatalysts for Solar Fuel Production and Environmental Remediation

“…This indicates the synergistic effect of O,Pdual doping on the promoted photocatalytic performance of g-C 3 N 4 . [296] The synergism of multiple heteroatoms for promoting the photocatalytic performance of multidoped g-C 3 N 4 photocatalysts are demonstrated by another example. [297] From Table 8, the P, S-copoded g-C 3 N 4 (P-SN)s hows 6.5 times higherd egradation rate of RhB than pristine g-C 3 N 4 ,a nd even shows 6.5/ 5.4 times higher than P-doped g-C 3 N 4 /S-doped g-C 3 N 4 (P-CN/S-CN), ascribed to the higher S BET ,p romoted light absorption and separation efficiency of photogenerated chargec arriers, and the enhanced transfer and suppressed recombination rate of electron-hole pairs.…”

“…The purpose of multi-doping is to remarkably shows much lower S BET ,l ower V total ,a nd lower E g by 0.1 eV,l ower PL intensity and higher electrical conductivity than pristine g-C 3 N 4 .T he P, O-codoping presentsasynergism for improving optical, electrochemical, and textural properties and for tuning the morphology characteristics of g-C 3 N 4 based photocatalysts. [296] For another example, the P, S-dual-doped g-C 3 N 4 (P-SN)a nd O,P,S-multidoped g-C 3 N 4 (P-SN (t)) were prepared by the co-polymerizationo ft hiourea and (NH 4 ) 2 HPO 4 ,a nd the hydrothermalt reatment at 150 8Cf or different times, respectively. [297] From Figure 35 a-c, SN features irregular particles composed of g-C 3 N 4 layers, P-SN features al ayered structure with ad ecreasing size compared to SN owing to a inhibiting effect of P-doping on crystal growth.…”