Recent Developments in Graphitic Carbon Nitride Based Hydrogels as Photocatalysts

Area of Science:

• Materials Science
• Environmental Chemistry
• Catalysis

Background:

• Graphitic carbon nitride (g-C3N4) is a key material for solar-driven photocatalysis, including hydrogen production, pollutant degradation, and CO2 reduction.
• Bulk g-C3N4 suffers from limitations like low surface area, high defect density, and rapid charge recombination, hindering its photocatalytic performance.
• 3D porous hydrogels offer a viable strategy to overcome these limitations through nanostructural engineering.

Purpose of the Study:

• To review recent advancements in g-C3N4-based hydrogels for photocatalytic applications.
• To highlight the synthesis, preparation, modification, and coupling strategies for these advanced materials.
• To discuss future challenges and opportunities in developing highly efficient g-C3N4 hydrogel photocatalysts.

Main Methods:

• Nanostructural engineering of g-C3N4 into 3D porous hydrogels.
• Synthesis and modification techniques for g-C3N4 hydrogel composites.
• Multicomponent coupling strategies to enhance photocatalytic activity.

Main Results:

• 3D porous g-C3N4 hydrogels demonstrate improved adsorption, stability, and separability.
• Enhanced active sites and internal conductive pathways facilitate charge transfer.
• Significant improvements in photocatalytic efficiency for water splitting and dye degradation are observed.

Conclusions:

• g-C3N4-based hydrogels represent a highly effective platform for advanced photocatalysis.
• Nanostructural engineering is crucial for optimizing the performance of g-C3N4 photocatalysts.
• Further research into synthesis and modification will unlock the full potential of these materials.