KOH etching graphitic carbon nitride for simulated sunlight photocatalytic nitrogen fixation with cyano groups as defects

Graphitic Carbon Nitride (g‐C3N4) Nanosheets as a Multipurpose Material for Detection of Amines and Solar‐Driven Hydrogen Production

“…Otherwise, the valence band of CN−KNa was shifted to the lower potential as compared to the bare CN (Figure 2(d)). This observation is probably due to the formation of cyano and carbonyl groups in CN−KNa, which alter the electronic and optical properties of the photocatalyst [32] . Interestingly, the conduction band edge of the CN−KNa sample is still more negative than the reduction potential of H + /H 2 (E H+/H2 = 0.0 V vs. RHE), indicating that the photocatalyst is capable of generating hydrogen under light illumination.…”

Insights into the Recent Progress and Advanced Materials for Photocatalytic Nitrogen Fixation for Ammonia (NH3) Production

“…The NH4 + production rates over the Besides using nitrogen vacancy active sites, nitrogen defects is also applied for producing NH 3 under solar simulation. Li et al introduced cyano-deficient onto bulk g-C 3 N 4 by cleavage C=N bond via KOH etching treatment [69]. The as-prepared g-C 3 N 4 (ACN) possesses a porous structure with ladder-like thin layers.…”

“…The cyano defects were successfully introduced into the g-C 3 N 4 framework by KOH etching and could contribute to improving the nitrogen photofixation ability of g-C 3 N 4 . (Reproduced with permission from Elsevier[69]). …”

Enhancement of visible‐light photocatalytic degradation performance over nitrogen‐deficient g‐C3N4/KNbO3 heterojunction photocatalyst

“…35 Due to the narrow band gap, the photocatalytic activity of CNx was significantly enhanced under visible excitation, and the inherent shortcomings of g-C 3 N 4 were overcome to some extent. 36 By combining KNO with CNx to form heterojunction materials, not only KNO can be sensitized, but also KNO and CNx have synergistic effects, which can improve the visible light utilization and carrier separation efficiency of KNO to a certain degree. Thus, the aforementioned analysis motivated us to design KNO/CNx composite photocatalyst and this composite has not been reported so far.…”

“…Nitrogen (N)‐defected g‐C 3 N 4 (CNx) is considered to be an effective photocatalyst, which not only has all the advantages of g‐C 3 N 4 , such as visible light response, stable non‐toxic, non‐polluting, easy to prepare, stable in physicochemical properties, etc., but also possesses rich N‐defect and unique electronic structure due to the introduction of N‐defect into the g‐C 3 N 4 framework . Due to the narrow band gap, the photocatalytic activity of CNx was significantly enhanced under visible excitation, and the inherent shortcomings of g‐C 3 N 4 were overcome to some extent . By combining KNO with CNx to form heterojunction materials, not only KNO can be sensitized, but also KNO and CNx have synergistic effects, which can improve the visible light utilization and carrier separation efficiency of KNO to a certain degree.…”