Fe3O4-Pt nanocomposite synthesized by green-hydrothermal hybrid method and its performance degrading methyl orange dye

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2025-03, Vol.313, p.117881, Article 117881
• Main Authors: León-Flores, J., Pérez-Mazariego, J.L., Marquina, M.L., Quintana-García, M., Tehuacanero-Cuapa, S., Ortega, J., Reyes-Damián, C., Arenas-Alatorre, J.
• Format: Article
• Language: English
• Subjects: Catalytic activity; FSEM; Magnetic nanoparticles; Mössbauer spectroscopy; Sustainable chemistry; TEM; XRD
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2024.117881

[Display omitted] •One-pot green hybrid synthesis of Fe3O4-Pt nanocomposite using coffee extract.•Ultra small nanocomposite with diameter between 2 and 5 nm.•Superparamagnetic nature of the nanocomposite is evidenced by magnetometry and Mössbauer spectroscopy.•Catalytic activity degrading methyl orange (MO) dye under UV irradiation. In this work is reported the one-pot synthesis of a Fe3O4-Pt nanocomposite with the use of coffee extract by a hydrothermal reaction. A direct mixture of FeCl3 and PtCl4 with a coffee extract concentration of 120 mg/mL in a stainless-steel autoclave reactor were heated for 18 h at 200 °C. Scanning and transmission electron microscopy show that Fe3O4-Pt nanocomposite have a mean size distribution of ∼ 5 nm for the Fe3O4 nanoparticles with a partial coverage of small Pt0 nanoparticles (less than 3 nm). Backscattered electron microscopy and infrared spectroscopy suggest the presence of an organic shell structure mediating the strong metal-support interaction. The magnetic behavior of the nanocomposite was studied by Mössbauer spectroscopy, also M(H) and M(T) measurements were made in a magnetometer; the measurements correspond to a superparamagnetic behavior. The photocatalytic activity of the Fe3O4-Pt nanocomposite was explored by degrading methyl orange dye after 10 min of UV irradiation. The results show the signified enhanced performance relative to Fe3O4 nanoparticles and evidence its role as support for the Pt nanoparticles. The enhancement in the photocatalytic activity could be due to the synergy between Fe3O4, Pt and UV light via plasmon resonance promoting the electron − hole recombination rate.