Water-assisted production of honeycomb-like g-C3N4 with ultralong carrier lifetime and outstanding photocatalytic activity

A novel g-C3N4 based photocathode for photoelectrochemical hydrogen evolution

Novel and stable g-C₃N₄ based photocathode was designed and prepared with excellent activity for PEC hydrogen production without external co-catalyst.

Templateless Infrared Heating Process for Fabricating Carbon Nitride Nanorods with Efficient Photocatalytic H2 Evolution

The bottom-up fabrication of carbon nitride nanorods is realized through the direct infrared heating of dicyandiamide. The approach requires no templates or extra organics. The controlled infrared heating has a major influence on the morphology of the obtained carbon nitrides. The precursors assemble into carbon nitride nanorods at low power levels, and they grow into nanoplates at high power levels. The formation mechanism of the carbon nitride nanorods is proposed to be a kinetically driven process, and the photocatalytic activity of the carbon nitride nanorods prepared at 50% power for hydrogen evolution is about 2.9 times that of carbon nitride nanoplates at 100% power. Structural, optical, and electronic analysis demonstrates that the enhancement is primarily attributed to the elimination of structural defects and the improved charge-carrier separation in highly condensed and oriented carbon nitride nanorods.

A facile method of activating graphitic carbon nitride for enhanced photocatalytic activity

Activated graphitic carbon nitride (g-C3N4) with enhanced photocatalytic capability under visible light irradiation was fabricated by using a facile chemical activation treatment method. In the chemical activation, a mixed solution of hydrogen peroxide and ammonia was employed. The yield can reach as high as 90% after the activation process. The activation process did not change the crystal structure, functional group, morphology and specific surface area of pristine g-C3N4, but it introduced H and O elements into the CN framework of g-C3N4, resulting in a broader optical absorption range, higher light absorption capability and more efficient separation of photogenerated electrons and holes. The photoactivity was investigated by the degradation of rhodamine B (RhB) under visible light irradiation. As compared to the pristine g-C3N4, the activated g-C3N4 exhibited a distinct and efficient two-step degradation process. It was found that the RhB dye in the activated g-C3N4 was mainly oxidized by the photogenerated holes. It is believed that sufficient holes account for the two-step degradation process because they would significantly improve the efficiency of the N-de-ethylation reaction of RhB.

Preparation of 2D hydroxyl-rich carbon nitride nanosheets for photocatalytic reduction of CO2

The nanosheet exhibits better visible-light photocatalytic activity than bulk g-C₃N₄ due to nanosheet nature and presence of more hydroxyl groups.

Template synthesis of carbon self-doped g-C3N4 with enhanced visible to near-infrared absorption and photocatalytic performance

Carbon self-doped g-C₃N₄ with enhanced visible to near-infrared absorption and photocatalytic activity was synthesized by a soft-template method.

The amphoteric properties of g-C3N4 nanosheets and fabrication of their relevant heterostructure photocatalysts by an electrostatic re-assembly route

A stable colloid of g-C₃N₄ nanosheets was prepared on a large scale via a H₂SO₄ exfoliation route.

A general method for type I and type II g-C3N4/g-C3N4 metal-free isotype heterostructures with enhanced visible light photocatalysis

Composite precursors were used to construct type I and type II g-C₃N₄/g-C₃N₄ metal-free isotype heterostructures based on different band-alignment patterns.

Surface oxygen-vacancy induced photocatalytic activity of La(OH)3 nanorods prepared by a fast and scalable method

Uniform one-dimensional La(OH)₃ nanorods with surface oxygen-vacancy induced photocatalytic activity were synthesized by a facile, fast and scalable method.