In De Jesús Ruíz-Baltazar et al., 2019, we can find proposed the green synthesis of Fe3O4 nanoparticles by means of the cynara cardunculus leaf extract. This synthesis route, which is considered as a green synthesis route, is defined as a "co-friendly alternative to obtaining of iron oxides nanoparticles" (De Jesús Ruíz-Baltazar et al., 2019). According to De Jesús Ruíz-Baltazar and coworkers, "the Fe3O4 nanostructures were synthesis starting [from] a mixture of ferric chloride and ferrous chloride in a 1:2 M ratio. The reducing agent employed was cynara cardunculus leaf extract". These nanoparticles are proposed for "water remediation containing organic dyes". The researchers characterized the particles by means of scanning electron microscopy (SEM) and X-ray diffraction (XRD), among other techniques. And the Raman spectroscopy has been used to support the characterization of magnetite nanoparticles. The prepared nanoparticles have been "evaluated on the methylene blue degradation".