The Solid-state Synthesis of MnFe2O4 and its Application as Photo-Fenton Catalyst for the Degradation of dye
Year: 2024
Type: conference-paper
Abstract: Manganese ferrite spinel has been successfully synthesized using birnessite-type manganese oxide (MnO2) and ferric chloride (FeCl3) through solid-state method. The solid product was then calcined at different temperatures to study the effect of the calcination on the structure and catalytic activity. The as-synthesized ferrite was further characterized by XRD, FTIR and Raman spectroscopy, and UV-DRS spectroscopy. The XRD results revealed that the predominant phase present is MnFe2O4, with the cyptomelane-type MnO2 appearing as a minor components. The increase in the calcination temperature resulted in more crystalline phase and purity of MnFe2O4. The IR vibration modes are found in-between 432-745 cm−1 with Fe-O bond at 680 cm−1 and 745 cm−1, and Mn-O at 412 cm−1, 432 cm−1 and 488 cm−1 indicated the spinel phase of the MnFe2O4. The Raman results further confirmed the presence of the MnFe2O4 phase. The UV-DRS results indicated that the calcination temperature has a strong influence on the optical properties. The catalytic test was conducted for the degradation of methylene blue (MB) dye using the photo-Fenton method and the MnFe2O4 calcined at 700°C showed the highest catalytic activity. In the optimum condition, the MnFe2O4 was able to degrade 97.99% of MB with the following conditions: 0.04 g of MnFe2O4, 5 mL of H2O2, and 50 ppm of initial MB concentration. The optimum condition seems to correlate with a low band gap and high purity of the MnFe2O4 phase.
Authors: A Awaluddin, R Nanda, A N Ilahi, E Amiruddin, I F P Deraf, S S Siregar
Institution: Riau University
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4405319032