Significantly narrowed bandgap and enhanced charge separation in porous, nitrogen-vacancy red g-C3N4 for visible light photocatalytic H2 production

Vacancy-modified g-C3N4and its photocatalytic applications

“…The obtained porous N v -g-C 3 N 4 exhibited an increased specific surface area and reduced bandgap to 1.88 eV, promoting visible-light absorption (up to 660 nm) and remarkable separation efficiency of photoinduced charge carriers. 94 Tetraethyl orthosilicate hydrolysis silica gel was used as a template to prepare N defect (cyano-group and N 2c vacancies)-modified mesoporous g-C 3 N 4 materials in situ . The produced g-C 3 N 4 had a mesoporous structure modified by cyano groups and N 2c vacancies.…”

“…60 A rod-like porous texture of N 2c modified g-C 3 N 4 could also generate a large surface area and significant enhancement of visible-light photocatalytic activity, which is attributed to the excellent visible-light absorption, larger surface area, and dramatically promoted charge transfer and separation. 94…”

Nanoporous Graphitic Carbon Nitride as Catalysts for Cofactor Regeneration

“…Nanoporous g-C 3 N 4 (PCN) has a unique nanoporous structure that can effectively increase the specific surface area of the catalysts and the reflection time of visible light, enhance the absorption of visible light, and facilitate carrier transport and mass transfer in the reaction . Templates to prepare PCN include silica nanoparticles, mesoporous silica, SBA15, , KIT-6, etc. Goettmann et al calcined cyanamide at 550 °C in the presence of silica nanoparticles (12 nm) and subsequently removed silica to obtain PCN, and the conversion rate was 90% when catalyzing Friedel–Crafts acylation of benzene, which is much higher than BCN (1%).…”

NiS as a Cocatalyst Decorated Heptazine-/Triazine-Based Carbon Nitride Coupled with Cd0.5Zn0.5S Solid Solution Heterojunction Photocatalysts: Efficient Interfacial Charge Transfer and Enhanced Photocatalytic Hydrogen Production Activity

“…Strategies like metal and/or nonmetal doping, heterojunction design, , defect chemistry engineering, , and cocatalyst modification have been applied to modulate the electronic structures, surface active sites, and charge carrier kinetics for better photocatalytic activity. Among them, the heterojunction design of g-C 3 N 4 with another semiconductor with a suitable band edge alignment has been considered as a promising route due to efficient spatial charge separation, improvement of visible light absorption, as well as subsequent high photocatalytic performance. , Indeed, several cases of heterostructural photocatalysts, including g-C 3 N 4 /TiO 2 , g-C 3 N 4 /Bi 2 WO 6 , , g-C 3 N 4 /CdS, g-C 3 N 4 /WO 3 , g-C 3 N 4 /Au/BiVO 4 , and so forth, have been explored to show enhanced photocatalytic performance toward contaminant degradation, hydrogen production, and carbon dioxide reduction.…”

“…Strategies like metal and/or nonmetal doping, 19 heterojunction design, 20,21 defect chemistry engineering, 22,23 and cocatalyst modification 24 have been applied to modulate the electronic structures, surface active sites, and charge carrier kinetics for better photocatalytic activity. Among them, the heterojunction design of g-C 3 N 4 with another semiconductor with a suitable band edge alignment has been considered as a promising route due to efficient spatial charge separation, improvement of visible light absorption, as well as subsequent high photocatalytic performance.…”