A Comparative Study on Optofluidic Fenton Microreactors Integrated with Fe-Based Materials for Water Treatment

Area of Science:

• Environmental Science
• Materials Science
• Chemical Engineering

Background:

• Catalyst performance is crucial for reaction efficiency in catalytic reactors.
• Optofluidic Fenton reactors offer advanced water treatment capabilities.
• Fe-based materials are investigated as catalysts for environmental remediation.

Purpose of the Study:

• To conduct a rapid comparative study of three Fe-based materials (FeSiB, FeNbCuSiB, FeNi) in an optofluidic Fenton reactor.
• To evaluate the dye degradation efficiency and reusability of different Fe-based catalysts.
• To determine the optimal Fe-based material for practical water treatment applications.

Main Methods:

• Integrating FeSiB, FeNbCuSiB, and FeNi sheets into an optofluidic Fenton reactor.
• Degrading organic dyes using hydrogen peroxide (H2O2) as the oxidant.
• Optimizing reaction conditions including H2O2 concentration, flow rate, and light irradiation.

Main Results:

• FeNi (1j85) showed high initial degradability (23.4%/s at 330 μL/min) but poor corrosion resistance.
• FeNbCuSiB (1k107) exhibited increasing degradation efficiency with reuse, reaching >98% after five cycles.
• FeSiB (1k101) demonstrated the lowest degradability and recyclability among the tested materials.

Conclusions:

• FeNbCuSiB (1k107) possesses the greatest potential for practical application in Fenton reactors for water treatment due to its enhanced reusability and high degradation efficiency.
• The study highlights the importance of catalyst selection and reusability in designing efficient optofluidic Fenton systems.
• FeNi offers high initial performance but limitations in durability hinder its widespread use.