Synthesis and applications of MgO/BaFe2O4 nanocomposite for electrochemical sensing and efficient photocatalytic dye degradation

This research presents the synthesis of MgO/BaFe 2 O 4 through a novel, environmentally conscious sol-gel process. Structural and compositional analyses validated the material's integrity. With an observed band gap of 1.977 eV, the material demonstrated potent photocatalytic efficiency, achieving 96.62% degradation of Indigo Carmine dye in 90 minutes under UV light, positioning it as a promising candidate for wastewater treatment. Moreover, its electrochemical properties were thoroughly investigated using a modified carbon paste electrode. After optimizing sweep rate, analyte concentration, and pH, the electrode exhibited a linear detection range of 10–100 μM for Dopamine and uric acid, with impressive detection limits around 8.650×10 -5 M and 8.645×10 -5 M, confirming its high sensitivity for trace substance analysis. Graphical representation of photocatalysis of dye using the prepared material • Eco-friendly Synthesis: MgO/BaFe 2 O 4 nanocomposite was successfully synthesized using a green sol-gel method. • Photocatalytic Efficiency: Achieved 96.62% degradation of Indigo Carmine dye under UV light within 90 minutes, indicating strong photocatalytic potential for wastewater treatment. • Electrochemical Sensing: Modified carbon paste electrode exhibited a wide linear range (10–100 μM) for dopamine and uric acid detection. • High Sensitivity: Demonstrated low detection limits (∼8.65×10 -5 M), confirming excellent sensitivity for trace level electrochemical analysis.