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Photo-Fenton degradation on Mo-doped NiFe2O4 photocatalyst
Anshu Shrivastava1, Uttam Kumar1, Indrajit Sinha1
1Department of Chemistry, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India. isinha.apc@iitbhu.ac.in.
Dalton Transactions (Cambridge, England : 2003)
|May 6, 2025
Summary
Molybdenum doping enhances nickel iron oxide (NiFe2O4) magnetic nanoparticles for improved photo-Fenton degradation of tetracycline. This doping boosts hydroxyl radical generation and catalytic efficiency for environmental remediation.
Area of Science:
- Materials Science
- Environmental Chemistry
- Catalysis
Background:
- Nickel iron oxide (NiFe2O4) exhibits limited photo-Fenton properties for pollutant degradation.
- Metal ion doping is a strategy to enhance the photocatalytic activity of magnetic materials.
Purpose of the Study:
- To investigate the effect of molybdenum (Mo) doping on the photo-Fenton activity of NiFe2O4 nanoparticles.
- To explore the mechanism of enhanced catalytic performance and tetracycline degradation.
Main Methods:
- Density Functional Theory (DFT) and Time-Dependent DFT (TD-DFT) calculations were performed.
- Molybdenum-doped NiFe2O4 nanoparticles were synthesized and characterized.
- Photo-Fenton degradation experiments using tetracycline (TC) as a model pollutant were conducted.
Main Results:
- DFT calculations predicted enhanced interaction between photoexcited Mo-doped NiFe2O4 and H2O2 for hydroxyl radical generation.
- Synthesized Mo-doped NiFe2O4 nanoparticles were smaller, superparamagnetic, and showed extended absorption edges.
- Mo-doping reduced interfacial charge transfer resistance, leading to excellent TC photo-Fenton degradation activity and recyclability.
Conclusions:
- Molybdenum doping effectively improves the photo-Fenton properties of NiFe2O4 by enhancing hydroxyl radical generation and charge transfer.
- Mo-doped NiFe2O4 nanoparticles present a promising recyclable catalyst for efficient degradation of organic pollutants like tetracycline.
