Fe-MOFs prepared with the DBD plasma method for efficient Fenton catalysis

Area of Science:

• Materials Science
• Environmental Chemistry
• Chemical Engineering

Background:

• Methyl orange (MO) is a common pollutant in industrial wastewater.
• Fenton process is an effective method for organic pollutant degradation.
• Developing efficient catalysts for Fenton process is crucial.

Purpose of the Study:

• Synthesize Fe-MOFs using DBD plasma.
• Optimize Fe-MOF synthesis for Fenton degradation of MO.
• Evaluate Fe-MOF performance in MO degradation.

Main Methods:

• Fe-MOF synthesis via dielectric barrier discharge (DBD) plasma.
• Characterization using XRD, SEM, EDS, BET, and FT-IR.
• Optimization of synthesis parameters (discharge time, voltage, concentration, ratio).
• Fenton degradation experiments with varying conditions (catalyst dosage, MO concentration, pH, H2O2).

Main Results:

• Optimal synthesis conditions identified: 100 min discharge time, 18 kV discharge voltage, 14 g L⁻¹ reactant concentration, and 1:5 TA:FeCl3·6H2O ratio.
• Achieved 85% methyl orange degradation within 40 minutes under optimized Fenton conditions.
• Identified optimal Fenton parameters: 0.12 g L⁻¹ Fe-MOF dosage, 50 mg L⁻¹ initial MO concentration, pH 5, and 1 mL L⁻¹ H2O2.
• Further optimization showed higher catalyst concentration, lower MO concentration, pH 3, and 1 mL L⁻¹ H2O2 enhanced degradation efficiency.

Conclusions:

• DBD plasma is a viable method for Fe-MOF synthesis.
• Synthesized Fe-MOFs exhibit excellent catalytic activity in Fenton degradation of methyl orange.
• Optimized Fe-MOFs offer a promising solution for treating methyl orange contaminated wastewater.