A Review on Cu₂O-Based Composites in Photocatalysis: Synthesis, Modification, and Applications

Area of Science:

• Materials Science
• Environmental Chemistry
• Catalysis

Background:

• Photocatalysis is a green technology for CO2 reduction, hydrogen production, and pollutant degradation.
• Copper(I) oxide (Cu2O) is a cost-effective, earth-abundant material with a narrow bandgap suitable for visible light photocatalysis.
• Cu2O-based composites offer significant potential but face challenges in photogenerated carrier recombination and low activity.

Purpose of the Study:

• To review recent advancements in Cu2O-based composite materials for photocatalysis.
• To investigate modification strategies and critical parameters influencing photocatalytic performance.
• To explore the application and mechanisms of Cu2O composites in energy conversion and environmental remediation.

Main Methods:

• Review of literature on pure Cu2O and Cu2O hybrid materials.
• Analysis of modification strategies for enhancing photocatalyst performance.
• Investigation of physical and chemical parameters affecting photocatalytic reactions.
• Evaluation of Cu2O-based catalysts in CO2 photoreduction, hydrogen production, and water treatment.

Main Results:

• Cu2O-based composites demonstrate potential in CO2 reduction, hydrogen production, and pollutant degradation.
• Modification strategies and optimized reaction parameters are crucial for improving photocatalytic efficiency.
• Understanding synergistic mechanisms enhances the performance of Cu2O photocatalysts.

Conclusions:

• Cu2O-based composites are promising for sustainable energy and environmental applications.
• Addressing challenges in carrier recombination and activity is key for large-scale implementation.
• Further research is needed to guide the practical application of Cu2O catalysts.