Bandgap engineering of polymetric carbon nitride copolymerized by 2,5,8-triamino-tri-s-triazine (melem) and barbituric acid for efficient nonsacrificial photocatalytic H2O2 production

Intrinsic Defects in Polymeric Carbon Nitride for Photocatalysis Applications

“…[21,26,44,45] PCN is capable to reduce O 2 into H 2 O 2 thermodynamically under photocatalytic conditions via a twoelectron pathway because the redox potential of CBM of PCN (À 1.3 V vs. SHE) is more negative than that of O 2 /H 2 O 2 (0.695 V vs. SHE). [26,46] Defective PCN is taken into consideration to improve the efficiency of H 2 O 2 production by promoting charge separation and introducing active sites. For instance, Li et al explored the relation between C vacancies and H 2 O 2 production performance over PCN.…”

“…Photocatalytic H 2 O 2 production under sufficient sunlight is a safe, green and efficient method to produce H 2 O 2 , a potent oxidant that can oxidize numerous organic or inorganic pollutants [21,26,44,45] . PCN is capable to reduce O 2 into H 2 O 2 thermodynamically under photocatalytic conditions via a two‐electron pathway because the redox potential of CBM of PCN (−1.3 V vs. SHE) is more negative than that of O 2 /H 2 O 2 (0.695 V vs. SHE) [26,46] . Defective PCN is taken into consideration to improve the efficiency of H 2 O 2 production by promoting charge separation and introducing active sites.…”

Solar‐Driven Photocatalytic Disinfection Over 2D Semiconductors: The Generation and Effects of Reactive Oxygen Species

“…The upshift of band positions has been observed in g‐C 3 N 4 that was copolymerized by melem and barbituric acid as well. [ 198 ] Correspondingly, when carbon nanotubes were covalently bonded on g‐C 3 N 4 , the stepwise O 2 reduction to H 2 O 2 was greatly enhanced, as a result of the negative shift of CB and efficient charge separation. [ 199 ] PWO clusters (polyoxometalates‐derived metal oxides) in the frameworks of g‐C 3 N 4 also increased the overall reduction activity of the system by negatively shifting the CB position of g‐C 3 N 4 .…”

Linear Conjugated Polymers for Solar-Driven Hydrogen Peroxide Production: The Importance of Catalyst Stability

“…For the 0 h experiment (Figure 3c), exactly the same procedures were applied, except for the lack of irradiation. This shows that 18 O isotopically labelled H2O2 is produced in the irradiated case. The 16 O2 was from the air as the gas samples were injected into the GC with a syringe.…”

“…A vial was charged with 50 mg DE7-M and 35 mL H2 16 O and sealed with a rubber septum, then bubbled with He for 10 min, 18 O2 gas (purity : 99%, ca. 10 mL) was subsequently injected by a syringe.…”