Electron flow mechanisms in the coupled photocatalytic-microbial systems

Area of Science:

• Environmental Science
• Biotechnology
• Materials Science

Background:

• Coupled photocatalytic-microbial systems (CPMSs) combine photocatalysts and microorganisms for water treatment and energy/chemical production.
• Electron flow mechanisms are crucial for CPMS efficiency but are not fully understood.
• A comprehensive understanding of electron flow is needed to advance CPMS technology.

Purpose of the Study:

• To systematically review and deepen the understanding of electron flow mechanisms in CPMSs.
• To establish a conceptual framework for analyzing electron flow across three key stages: generation, transfer, and utilization.
• To guide the design of efficient, low-energy wastewater treatment and sustainable chemical synthesis.

Main Methods:

• Literature review integrating interdisciplinary perspectives.
• Focus on fundamental stages of electron flow: generation, transfer, and utilization.
• Analysis of biotic-abiotic communication within CPMSs.

Main Results:

• Identified electron flow as the critical biotic-abiotic communication bridge in CPMSs.
• Highlighted the lack of comprehensive understanding of electron flow mechanisms in current CPMS configurations.
• Proposed a framework for analyzing electron flow across generation, transfer, and utilization stages.

Conclusions:

• Elucidating full-process electron flow mechanisms is key to maximizing CPMS capabilities.
• Understanding these mechanisms provides guidance for developing efficient wastewater treatment and solar-driven carbon neutrality technologies.
• This review advances mechanistic comprehension for practical CPMS development.