Optimizing Light Dynamics: Designing a Ni-MOF Functionalized g-C₃N₄ Type II Heterostructure and a Ti₃C₂ MXene...

Area of Science:

• Materials Science
• Catalysis
• Renewable Energy

Background:

• Photocatalytic hydrogen production is key for sustainable energy.
• Co-catalyst synergy is crucial for enhancing photocatalytic efficiency.
• Developing efficient, noble metal-free catalysts is a global priority.

Purpose of the Study:

• To develop a novel ternary heterojunction catalyst for efficient photocatalytic hydrogen evolution.
• To investigate the synergistic effects of Ni-MOF, CN, and TC in a Type II heterojunction.
• To explore the role of MXene as an electron acceptor in photocatalysis.

Main Methods:

• Solvothermal and wet impregnation methods were used for catalyst synthesis.
• A ternary heterojunction (Ni-MOF/CN/TC) was constructed.
• Photocatalytic hydrogen evolution rates were measured under visible light.

Main Results:

• The Ni-MOF/CN/TC catalyst exhibited a Type II heterojunction and a Schottky junction.
• Efficient charge separation and reduced recombination were observed.
• A peak hydrogen evolution rate of 1044.46 μmol/g over 3 hours was achieved, outperforming individual components.

Conclusions:

• The ternary Ni-MOF/CN/TC catalyst demonstrates superior photocatalytic activity for hydrogen production.
• MXene-based ternary systems offer a promising platform for enhanced light absorption and charge separation.
• This work highlights the potential for efficient, noble metal-free photocatalysts in sustainable energy applications.