Spatially separated HOMO-LUMO sites in highly intra- and inter-plane crystalline g-C3N4 photocatalyst for exceptional H2 generation

Graphitic carbon nitride (g‐C3N4) is a prominent photocatalyst that has attracted substantial interest in the field of photocatalytic environmental remediation due to the low cost of fabrication, robust chemical structure, adaptable and tunable energy bandgaps, superior photoelectrochemical properties, cost‐effective feedstocks, and distinctive framework. Nonetheless, the practical application of bulk g‐C3N4 in the photocatalysis field is limited by the fast recombination of photogenerated e−‐h+ pairs, insufficient surface‐active sites, and restricted redox capacity. Consequently, a great deal of research has been devoted to solving these scientific challenges for large‐scale applications. This review concisely presents the latest advancements in g‐C3N4‐based photocatalyst modification strategies, and offers a comprehensive analysis of the benefits and preparation techniques for each strategy. It aims to articulate the complex relationship between theory, microstructure, and activities of g‐C3N4‐based photocatalysts for atmospheric protection. Finally, both the challenges and opportunities for the development of g‐C3N4‐based photocatalysts are highlighted. It is highly believed that this special review will provide new insight into the synthesis, modification, and broadening of g‐C3N4‐based photocatalysts for atmospheric protection.

show abstract

Graphdiyne Nanosheets Integrated with Ni₆MnO₈ via In Situ Calcination: A Robust S‐Scheme Heterojunction for Enhanced Eosin Y‐Sensitized Photocatalytic Hydrogen Production

Wang,

Jin,

Pan

et al. 2024

Solar RRL

View full text Add to dashboard Cite

As a 2D semiconductor material, graphdiyne (GDY) is a promising photocatalyst with excellent carrier mobility, uniform pores, ideal light absorption, and appropriate bandgap structure. Herein, GDY nanosheets are prepared by mechanical ball milling and subsequently tightly bonded to Ni6MnO8 by the in situ calcination method. The constructed Ni6MnO8/GDY S‐scheme heterojunction exhibits excellent photocatalytic performance. Under visible light, with eosin Y as the sensitizer, the hydrogen evolution of the optimized component reaches 1719.2 μmol (g h)−1, representing 3.6 and 9.6 times enhancement in comparison with that of Ni6MnO8 and GDY, respectively. The in situ calcination method is thought to play a major role in improving the efficiency of hydrogen evolution, which can enhance the interactions between the materials without significantly reducing the specific surface area of the materials. The presence of an internal electric field in the composite catalyst facilitates the separation and migration of photogenerated carriers. Furthermore, an S‐scheme heterojunction charge transfer model with Ni6MnO8 as the active site for hydrogen precipitation is rationally constructed by in situ X‐ray photoelectron spectroscopy, thereby revealing the migration path of photogenerated carriers. The results provide a new strategy for the construction of GDY‐based photocatalytic composite catalysts with exceptional potential for hydrogen generation.

show abstract

Spatially separated HOMO-LUMO sites in highly intra- and inter-plane crystalline g-C3N4 photocatalyst for exceptional H2 generation

Cited by 3 publications

References 56 publications

Visible light induced efficient photocatalytic hydrogen production by graphdiyne/CoSe ohmic heterojunction

Visible light induced efficient photocatalytic hydrogen production by graphdiyne/CoSe ohmic heterojunction

Engineering of Graphitic Carbon Nitride (g‐C₃N₄) Based Photocatalysts for Atmospheric Protection: Modification Strategies, Recent Progress, and Application Challenges

Graphdiyne Nanosheets Integrated with Ni₆MnO₈ via In Situ Calcination: A Robust S‐Scheme Heterojunction for Enhanced Eosin Y‐Sensitized Photocatalytic Hydrogen Production

Contact Info

Product

Resources

About

Spatially separated HOMO-LUMO sites in highly intra- and inter-plane crystalline g-C3N4 photocatalyst for exceptional H2 generation

Cited by 3 publications

References 56 publications

Visible light induced efficient photocatalytic hydrogen production by graphdiyne/CoSe ohmic heterojunction

Visible light induced efficient photocatalytic hydrogen production by graphdiyne/CoSe ohmic heterojunction

Engineering of Graphitic Carbon Nitride (g‐C3N4) Based Photocatalysts for Atmospheric Protection: Modification Strategies, Recent Progress, and Application Challenges

Graphdiyne Nanosheets Integrated with Ni6MnO8 via In Situ Calcination: A Robust S‐Scheme Heterojunction for Enhanced Eosin Y‐Sensitized Photocatalytic Hydrogen Production

Contact Info

Product

Resources

About

Engineering of Graphitic Carbon Nitride (g‐C₃N₄) Based Photocatalysts for Atmospheric Protection: Modification Strategies, Recent Progress, and Application Challenges

Graphdiyne Nanosheets Integrated with Ni₆MnO₈ via In Situ Calcination: A Robust S‐Scheme Heterojunction for Enhanced Eosin Y‐Sensitized Photocatalytic Hydrogen Production