Magnetic Photocatalyst Nanocomposite Based on MnFe2O4@ZnO for AZO Dye Degradation
Por:
Lopez Medina J.A., Domínguez D., Pizá P., Liu G., Velez C., Reyes Gómez F., Farías M.H., Caudillo-Flores U., Soto Herrera G., Tiznado H., Mejía-Salazar J.R.
Publicada:
1 ene 2025
Ahead of Print:
1 abr 2025
Resumen:
This work focuses on fabricating a photocatalyst nanocomposite based on MnFe2O4@ZnO for degrading Red Amaranth azo dye. Manganese ferrite (MnFe2O4) magnetic nanoparticles were synthesized via a hydrothermal method, while a ZnO thin film, acting as the photoactive layer, was deposited on the magnetic cores using the atomic layer deposition (ALD) technique. X-ray diffraction (XRD) confirmed the spinel ferrite structure of MnFe2O4 and the hexagonal wurtzite phase of ZnO. The crystallite size, determined from the (311) peak, was 36.5 nm; this value was consistent with the average size of 33.2 nm measured by transmission electron microscopy (TEM). Magnetic characterization via vibrating sample magnetometry (VSM) at room temperature revealed a superparamagnetic behavior, determined by a very small hysteresis loop. The ZnO coating, achieved with 200 ALD cycles, resulted in a degradation efficiency ?eff of approximately 60% for the Red Amaranth dye. Finite-difference time-domain (FDTD) simulations provided theoretical insights into the electromagnetic interactions driving the photodegradation process, supporting the UV-vis absorbance data of the AZO dye. This nanocomposite can be considered as a soft magnetic material that offers promising applications in nanotechnology for environmentally friendly wastewater treatment and remediation. © 2025 The Authors. Published by American Chemical Society.
Filiaciones:
Lopez Medina J.A.:
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, B.C., Ensenada, C.P. 22800, Mexico
SECIHTI - IxM - Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, B.C., Ensenada, C.P. 22800, Mexico
Domínguez D.:
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, B.C., Ensenada, C.P. 22800, Mexico
Pizá P.:
Centro de Investigación en Materiales Avanzados-CIMAV, CH, Chihuahua, C.P. 31136, Mexico
Liu G.:
University of California, Irvine, C.P. 92697-3975, CA, United States
Velez C.:
University of California, Irvine, C.P. 92697-3975, CA, United States
Department of Mechanical and Aerospace Engineering, University of California, Irvine, C.P. 92697-3975, CA, United States
Reyes Gómez F.:
National Institute of Telecommunications (Inatel), Santa Rita do Sapucaí, C.P. 37536-001, Brazil
Farías M.H.:
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, B.C., Ensenada, C.P. 22800, Mexico
Caudillo-Flores U.:
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, B.C., Ensenada, C.P. 22800, Mexico
Soto Herrera G.:
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, B.C., Ensenada, C.P. 22800, Mexico
Tiznado H.:
Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, B.C., Ensenada, C.P. 22800, Mexico
Mejía-Salazar J.R.:
National Institute of Telecommunications (Inatel), Santa Rita do Sapucaí, C.P. 37536-001, Brazil
|