Design and photocatalytic performance of BaFe12O19 nanoplatelets for RR195 dye

Ramos-Guivar J.A.; Canchanya-Huaman Y.; Mayta-Armas A.F.; Rueda-Vellasmin R.; Bendezú-Roca Y.; Checca-Huaman N.-R.; Passamani E.C. · Materials Science and Engineering: B (2026) · DOI: 10.1016/j.mseb.2025.118716

Resumen

The synthesis of single-phase magneto-plumbite (M−type) Ba-hexaferrite (BaFe12O19) remains challenging, particularly at nano scale. This study investigates the formation of pure BaFe12O19 via sol–gel autocombustion (SGA) and coprecipitation (CP) methods, using a stoichiometric Ba/Fe ratio (1/12) and annealing between 650–950 °C. Six (SGA) and four (CP) samples were prepared. Rietveld refinement of X-ray diffraction patterns confirmed single-phase BaFe12O19 with 73(6) nm crystallite size at 950 °C using the SGA route (R12-SGA3). Transmission electron microscopy analysis revealed nanoplatelet morphology with low agglomeration and good dispersion. Photocatalytic performance, optimized using Box–Behnken design, showed 97% degradation of reactive red 195 dye under visible light at optimal conditions: 0.89 g L–1 catalyst dose, 1.03 h irradiation, and 10.03 mg L–1 dye concentration. The model exhibited strong correlation (R2 = 0.944), validating the optimization. The BaFe12O19 catalyst also exhibited excellent reusability, maintaining > 90% efficiency after four cycles, indicating its promise for environmental remediation applications.

Instituciones: Universidad Nacional Mayor de San Marcos; Universidad Nacional del Centro del Perú