Defective Cd

Area of Science:

• Materials Science
• Photocatalysis
• Renewable Energy

Background:

• Semiconductor heterojunctions are key for efficient photocatalysis, enhancing light absorption and charge separation.
• Constructing Z-scheme heterojunctions is a promising strategy to improve photocatalytic hydrogen evolution.

Purpose of the Study:

• To fabricate a novel Z-scheme heterojunction using a Cd0.3Zn0.7S twin crystal and Ag3PO4.
• To evaluate the photocatalytic hydrogen production performance of the synthesized heterojunction.

Main Methods:

• Synthesis of a Cd0.3Zn0.7S twin crystal and Ag3PO4.
• Fabrication of the Cd0.3Zn0.7S/Ag3PO4 Z-scheme heterojunction.
• Measurement of photocatalytic hydrogen production rates.

Main Results:

• The Cd0.3Zn0.7S/1%Ag3PO4 photocatalyst achieved a hydrogen production rate of 167.29 μmol h-1.
• This performance was significantly higher than that of Cd0.3Zn0.7S and pristine ZnS/CdS.
• The enhanced performance is attributed to the defective twin crystal structure and the Z-scheme interface.

Conclusions:

• The novel Z-scheme heterojunction demonstrates superior photocatalytic hydrogen evolution capabilities.
• The defective twin crystal structure and Z-scheme interface effectively promote charge separation and carrier lifetime.
• This work offers insights for designing efficient twin crystal heterojunctions for high-performance photocatalytic hydrogen production.