Crystalline Carbon Nitride Nanosheets for Improved Visible-Light Hydrogen Evolution

Post-annealing reinforced hollow carbon nitride nanospheres for hydrogen photosynthesis

Hollow-structured g-C3N4 polymers with a high thermal stability up to 550 °C and an enhanced photocatalytic activity have been developed by post-annealing treatment, which effectively modifies the textural, crystal, and electronic properties of the g-C3N4 semiconductors without extra chemical assistance. This is a unique example of thermally and chemically stable conjugated polymers with hollow nanostructures and optoelectronic properties, promising the development of functional hollow g-C3N4 nanocomposites by chemical modifications like doping, surface grafting, and coupling with other inorganic/polymeric semiconductors with the aid of thermal treatment at high temperatures.

Origin of photoactivity in graphitic carbon nitride and strategies for enhancement of photocatalytic efficiency: insights from first-principles computations

Our computations suggest that CdSe-g-C₃N₄ and WTe₂-g-C₃N₄ heterostructured nanosheets are efficient for improving photocatalytic activities of g-C₃N₄.

An efficient top-down approach for the fabrication of large-aspect-ratio g-C3N4 nanosheets with enhanced photocatalytic activities

Rapid and high-yield production of g-C₃N₄ nanosheets with large aspect ratios by a moderate disintegration–exfoliation approach.

Rapid and high-yield production of g-C3N4 nanosheets via chemical exfoliation for photocatalytic H2 evolution

Rapid and high-yield production of g-C₃N₄ nanosheets with enhanced photocatalytic H₂ evolution activity under visible-light irradiation was achieved by adding water into a concentrated H₂SO₄ suspension of bulk g-C₃N₄.

Exfoliated carbon nitride nanosheets decorated with NiS as an efficient noble-metal-free visible-light-driven photocatalyst for hydrogen evolution

Exfoliated ultrathin C₃N₄ nanosheets decorated with NiS as a highly efficient visible-light-driven photocatalyst for photoinduced hydrogen evolution.

Temperature-controlled morphology evolution of graphitic carbon nitride nanostructures and their photocatalytic activities under visible light

This work provides a simple strategy for exfoliating bulk g-C₃N₄ and offers in-depth understanding on structure–activity relationship of g-C₃N₄.

Photocatalytic hydrogen production using polymeric carbon nitride with a hydrogenase and a bioinspired synthetic Ni catalyst

Solar-light-driven H2 production in water with a [NiFeSe]-hydrogenase (H2ase) and a bioinspired synthetic nickel catalyst (NiP) in combination with a heptazine carbon nitride polymer, melon (CN(x)), is reported. The semibiological and purely synthetic systems show catalytic activity during solar light irradiation with turnover numbers (TONs) of more than 50,000 mol H2(mol H2ase)(-1) and approximately 155 mol H2 (mol NiP)(-1) in redox-mediator-free aqueous solution at pH 6 and 4.5, respectively. Both systems maintained a reduced photoactivity under UV-free solar light irradiation (λ>420 nm).

Photocatalytic Hydrogen Production using Polymeric Carbon Nitride with a Hydrogenase and a Bioinspired Synthetic Ni Catalyst

Solar-light-driven H₂ production in water with a [NiFeSe]-hydrogenase (H₂ase) and a bioinspired synthetic nickel catalyst (NiP) in combination with a heptazine carbon nitride polymer, melon (CN_x), is reported. The semibiological and purely synthetic systems show catalytic activity during solar light irradiation with turnover numbers (TONs) of more than 50 000 mol H₂ (mol H₂ase)⁻¹ and approximately 155 mol H₂ (mol NiP)⁻¹ in redox-mediator-free aqueous solution at pH 6 and 4.5, respectively. Both systems maintained a reduced photoactivity under UV-free solar light irradiation (λ>420 nm).