Macroscopic 3D Porous Graphitic Carbon Nitride Monolith for Enhanced Photocatalytic Hydrogen Evolution

Abstract

A macroscopic 3D porous graphitic carbon nitride (g-CN) monolith is prepared by the one-step thermal polymerization of urea inside the framework of a commercial melamine sponge and exhibits improved photocatalytic water-splitting performance for hydrogen evolution compared to g-CN powder due to the 3D porous interconnected network, larger specific surface area, better visible light capture, and superior charge-separation efficiency.

Reduced-sized monolayer carbon nitride nanosheets for highly improved photoresponse for cell imaging and photocatalysis

“…The fitted high resolution N 1s spectrum shows the presence of four types of N species, containing C=N-C at 398.6 eV, N-(C)3 at 399.5 eV, C-N-H at 400.8 eV, and the positive charge of heptazine at 404.8 eV (Fig. 3d) [39,42,43]. Both C 1s and N 1s spectra firmly demonstrate the presence of basic tri-s-triazine units in NMGCNs, in agreement with the FTIR results.…”

Novel Cu3P/g-C3N4 p-n heterojunction photocatalysts for solar hydrogen generation

“…As shown in Fig. 3a, the typical values for C-C, C-NH 2 , and N-C=N in g-C 3 N 4 were respectively presented at binding energies of 284.8, 286.1, and 288.1 eV [31]. Meanwhile, the peaks at 398.4, 399.6, 401.1, and 404.2 eV of N 1s spectrum (Fig.…”

Enhanced visible light photocatalytic H2 production activity of g-C3N4 via carbon fiber

“…However, the photocatalytic activity of the pure g-C 3 N 4 is often limited because of its fast recombination rate of photoinduced electron-hole pairs and low specific surface area [27,30,31]. To optimize the photocatalytic performance of g-C 3 N 4 , various approaches have been applied, including structural improvement [27,[32][33][34][35][36][37], introducing heteroatoms (metal or nonmetal) to tune its electronic band structure [27,[38][39][40][41][42] and coupling with other components (metal oxides, monomer, carbon based materials et al) [22,27,[43][44][45][46][47][48][49][50][51] to efficiently enhance its photogenerated charge separation.…”