Synthesis of hierarchical tandem double Z-scheme heterojunctions for robust photocatalytic H2 generation

Phosphorus-modified two-dimensional graphdiyne (CnH2n−2)/ZnCdS forms S-scheme heterojunctions for photocatalytic hydrogen production

“…C element is divided into four characteristic peaks in GDY, GDY-P and ZGP-7. In the original GDY, the peaks at 288.80, 286.50, 285.10, and 284.50 eV correspond to the four C-bonds of CO, C–O, C–C sp and C–C sp 2 , 25,54–56 respectively, and the ratio of the sp/sp 2 peak area is about 2, indicating that the GDY network structure formed by the connection of diacetylene bonds between benzene rings. In GDY-P and ZGP-7, the ratio of the sp/sp 2 peak area of C element became 1, which may be due to the introduction of phosphorus atoms to destroy part of the diacetylene bond.…”

Graphdiyne-based photocatalysts for solar fuel production

“…129 These advantages contribute to the excellent activities of graphdiyne-based photocatalysts in photocatalytic hydrogen evolution. 130–132…”

“…129 These advantages contribute to the excellent activities of graphdiyne-based photocatalysts in photocatalytic hydrogen evolution. [130][131][132] For instance, Li et al synthesised a graphdiyne/CuBr composite using CuBr as a substrate for photocatalytic hydrogen evolution. 133 Due to the suitable band arrangement between graphdiyne and CuBr, a p-n heterojunction is formed between them.…”

Fabrication of graphdiyne and its analogues for photocatalytic application

“…Large surface area and porous structure of GDY enable the fast mass transfer and more catalytic sites to be exposed, which can accelerate the reaction process. 14,15 Highly π-conjugated networks endow GDY with a high electrical conductivity, which promotes photo generated carriers transfer. 16,17 In addition, GDY has presented outstanding chemical stability during the catalytic process even in some severe reaction conditions such as acidic and alkaline conditions.…”

“…Out of the overlap of carbon p orbitals and π‐bonding, GDY has semiconductor properties with a direct band gap of 0.46–1.22 eV and suitable band energy level, 12,13 ensuring the occurrence of photocatalytic process upon exposure to light energy. Large surface area and porous structure of GDY enable the fast mass transfer and more catalytic sites to be exposed, which can accelerate the reaction process 14,15 . Highly π‐conjugated networks endow GDY with a high electrical conductivity, which promotes photo generated carriers transfer 16,17 .…”