[The Latest Research Progress of Coupling between BiOX and Semiconductor Photocatalyst]

Area of Science:

• Materials Science
• Photocatalysis
• Environmental Chemistry

Background:

• Semiconductor heterojunctions improve charge separation and spectral response.
• Photocatalytic efficiency is influenced by semiconductor coupling methods and reaction conditions.
• Tuning crystal structure and surface properties enhances photocatalytic quantum efficiency.

Purpose of the Study:

• To review advancements in coupled semiconductor photocatalysis.
• To discuss the formation and performance of heterojunctions using halogen bismuth oxides (BiOX).
• To explore strategies for improving visible light utilization in semiconductor photocatalysis.

Main Methods:

• Formation of heterojunctions between different semiconductor materials.
• Coupling of halogen bismuth oxides (BiOX) with other semiconductor compounds (e.g., oxides, AgX, Bi2S3).
• Review of recent research on preparation methods, influencing factors, and visible light utilization.

Main Results:

• Coupled systems, such as BiOX with oxides, AgX/BiOX, and Bi2S3/BiOX, demonstrate improved photocatalytic degradation of pollutants.
• AgI/BiOI composites exhibit higher photocatalytic reactivity under visible light compared to individual components.
• Improved electron-hole separation efficiency observed in coupled systems like Bi2S3/BiOX.

Conclusions:

• Semiconductor coupling via heterojunctions is a promising strategy for enhancing photocatalytic performance.
• Careful control over preparation methods and material properties is crucial for optimizing photocatalytic efficiency.
• Future research should focus on addressing current challenges and improving visible light utilization in coupled semiconductor systems.