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- Title
Photo-assisted assembly of MgO/Fe<sub>2</sub>O<sub>3</sub> composites for photocatalytic Rhodamine B degradation and their mimicking activity.
- Authors
Utaiyachandran, Manojkumar; Durairaj, Kaliannan; Kumar, Alagarasan Jagadeesh; Sivakumar, Subpiramaniyam; Palanivel, Velmurugan; Senthilkumar, Palaninaicker
- Abstract
In this study, MgO/Fe2O3 composites were synthesized from Annona squamosa seed extracts via a photo-assisted method using sunlight (S1), sodium (S2), and light emitting diode (LED) (S3) light sources. The three MgO/Fe2O3 composites were characterized using different techniques. X-ray diffraction patterns revealed the crystalline nature of the composites, and Fourier-transform infrared spectroscopy revealed 425 and 586 cm-1 stretching, indicating Mg-O and Fe-O bond formation, respectively. Scanning electron microscopy results revealed that the composites had diverse sizes and shapes. Moreover, the UV-Visible diffuse reflectance spectra showed that the bandgaps for S1, S2 and S3 were 3.03, 3.10, and 3.03 eV, respectively. Dynamic light scattering results showed that the surface charges for S1, S2, and S3 were -30.5, -28, and -24.9 mV, respectively. The photocatalytic Rhodamine B degradation efficiency of the MgO/Fe2O3 composites was examined in batch mode. The reaction rate constants (k) for S1, S2, and S3 composites were 0.02919, 0.02769, and 0.02813 min-1, respectively, indicating that the reaction followed a pseudo-first-order kinetics model. The catalytic efficiency of the MgO/Fe2O3 composites in a mimetic reaction revealed their effectiveness in the amine-to-imine conversion. Therefore, the MgO/Fe2O3 composites can be used for industrial wastewater remediation and medical applications.
- Subjects
RHODAMINE B; LIGHT emitting diodes; LIGHT sources; SEWAGE; SURFACE charges
- Publication
Desalination & Water Treatment, 2023, Vol 314, p263
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2023.30110