▎ 摘　　要

Magnetic and photoactive carbon based materials with the use of polyoxometalate-based ionic crystal [Fe (phen)(3)][SiW12O40].3DMF (IC-Fe) on cobalt(II) monoxide decorated magnetic carbon nanomaterials (MCNs/ Fe3O4/CoO) were synthesized and characterized. The prepared nanocomposites were characterized by FT-IR, XRD, Raman, TEM, VSM, XPS and UV-Vis. We have shown that synthesized MCNs/Fe3O4/CoO/IC-Fe nano composites (CNs = graphene oxide (GO) and multiwalled carbon nanotubes (MWCNTs)) can be used as a stable photocatalyst for the photodegradation of 2,4,6-Trichlorophenol (2,4,6-TCP) pollutant, under visible-light irradiation. The examination of the photocatalytic activity of the synthesized nanocomposites was compared with the one of the pristine IC-Fe nanoparticles. We present that Graphene Oxide influences the photocatalytic activity of the GO/Fe3O4/CoO/IC-Fe and it is compared to its MWCNTs analogue. The main effect of the introduction of CNs in such nanocomposites is the decrease of the band gap, with a consequence on the absorbance which is enhanced in both cases (for GO the effect is stronger). The results show that the GO-based photocatalyst demonstrated better photocatalytic activity than the starting materials. In addition, the magnetic properties of the composite's materials can be used for the collection and reuse of the nanocomposites at the end of the photocatalytic reactions.