Nitrogen-deficient modified P–Cl co-doped graphitic carbon nitride with enhanced photocatalytic performance

Functionalized Graphitic Carbon Nitrides for Environmental and Sensing Applications

“…According to the theoretical estimations by DFT, codoping effectively reduced the bandgap and provided more active sites, which in turn enhanced electron–hole transfer. Yang et al [ 110 ] also reached a similar conclusion by synthesizing a nitrogen‐deficient g‐C 3 N 4 with melamine and doping it with ammonium phosphate and ammonium chloride. The structure codoped with P and Cl showed a more negative conduction band potential.…”

Element-doped graphitic carbon nitride: confirmation of doped elements and applications

“…The effects of element-doped g-CN and the mechanisms of performance enhancement are usually revealed by various measurements. For example, the photocatalytic mechanism 103 The results of scavenger experiments in Fig. 10 doping, and thus stronger reducing ability to form •O 2is obtained.…”

“…44,60 Sometimes, this variation of VB and CB positions can cause a wider band gap. 101,103 The band structures of some metallic element-doped g-CN materials are shown in Fig. 8(b).…”

“…However, FTIR suffers the following disadvantages in the characterization of element-doped g-CN: (1) according to some reports, doping may make no difference between the FTIR spectra of pristine g-CN and element-doped g-CN because that heteroatoms do not change the microstructure of g-CN;38,42,56,62,64,66 (2) FTIR bands can be influenced by the content of heteroatoms. Yang's group synthesized P-Cl co-doped g-CN via annealing the mixed precursor of ammonium chloride, ammonium phosphate, and melamine 103. The FTIR spectra of their samples exhibit the bands at 820, 1200-1600 and 3000-3500 cm -1 , which are attributed to breathing mode of tri-s-triazine rings, stretching vibration modes of CN heterocycles, and uncondensed terminal amino groups, respectively; while no vibration bands associated with P or Cl groups are discovered due to the low content of P and Cl (Fig.5(d)).…”

In situ formation of 2-thiobarbituric acid incorporated g-C3N4 for enhanced visible-light-driven photocatalytic performance

“…8b and c, based on Gaussian tting, the PL emission of CN could be well deconvoluted into three peaks centered at 436.1, 459.6 and 500.6 nm, corresponding to the electron transition pathways of s*-LP (lone pair state), p*-p, and p*-LP. 49,50 However, these three peaks of TBA/CN-3 clearly redshied to 471.7, 508.5 and 574.2 nm in comparison to those of CN, suggesting that the electronic transition pathway has changed. Moreover, the improved ratio of peaks B and C of TBA/ CN-3 revealed that the corresponding electronic transition types of p*-p, and p*-LP dominated, which was mainly due to the increase in the sp 2 C]C bonds and S atoms with more valence electrons by the incorporation of TBA.…”