Catalytic Applications of Carbon Nitride Materials

Carbon nitride materials, notably graphitic carbon nitride (g-C3N4) and related covalent frameworks, have emerged as versatile catalysts across photochemical, electrochemical and thermal processes. Their polymeric networks of carbon and nitrogen afford high thermal and chemical stability, tunable electronic structures and abundant surface basic sites. Through controlled synthesis methods—such as templating, self-condensation of nitrogen-rich precursors and covalent assembly—researchers tailor porosity, stoichiometry and band gaps to promote efficient light harvesting, charge separation and molecule activation. In photocatalysis, carbon nitrides drive water splitting, CO2 reduction and pollutant degradation under visible light. In organic synthesis, they serve as metal-free base catalysts or support matrices for metal nanoparticles, enabling selective oxidation, hydrogenation and carbon–carbon bond formation. The introduction of acid–base bifunctionality, heteroatom doping or hybridisation with metal oxides and two-dimensional materials further extends their reactivity and selectivity. Such modifications have led to enzyme-like cascade reactions, low-temperature hydrogenations and high-yield condensations, underscoring the global importance of carbon nitrides for sustainable energy conversion and green chemical manufacture.

Research from Nature Portfolio

Recent studies have demonstrated that mesoporous carbon nitride can be surface-functionalised through mild photo-oxidation to introduce acid and base groups in spatially separated domains. This bifunctional catalyst achieves complete conversion and near-perfect selectivity in a one-pot deacetalization–Knoevenagel reaction, mimicking enzymatic cooperativity. The work highlights the potential of designing multifunctional carbon nitride nanomaterials for green organic synthesis and illustrates a general route to combine inherent basic sites with introduced acidic functionalities without mutual deactivation.

Catalytic Applications of Carbon Nitride Materials publication trend

The graph below shows the total number of articles in catalytic applications of carbon nitride materials across all publications each year (not limited to Nature Index journals).

Technical terms

Graphitic carbon nitride (g-C3N4): Polymeric semiconductor composed of triazine or heptazine units, noted for layered structure and visible-light activity.

Photocatalysis: Acceleration of a chemical reaction by light in the presence of a catalyst, often involving charge separation and redox processes.

Mesoporosity: Presence of pores with diameters between 2 and 50 nanometres, enhancing surface area and mass transport.

Knoevenagel condensation: Base-catalysed coupling of aldehydes or ketones with active methylene compounds, yielding α,β-unsaturated products.

Band gap: Energy difference between the valence and conduction bands in semiconductors, determining light absorption characteristics.

References

1. Diaminotetrazine based mesoporous C 3 N 6 with a well-ordered 3D cubic structure and its excellent photocatalytic performance for hydrogen evolution. Journal of Materials Chemistry A (2017).
2. Bifunctional Mesoporous Carbon Nitride: Highly Efficient Enzyme-like Catalyst for One-pot Deacetalization-Knoevenagel Reaction. Scientific Reports (2015).
3. Aminoguanidine Derived N‐Rich Mesoporous Carbon Nitrides with Tunable Nitrogen Contents for Knoevenagel Condensation. ChemCatChem (2023).
4. Harnessing palladium-decorated g-C3N4 nanosheets for selective catalytic benzyl alcohol synthesis. Molecular Catalysis (2024).