Abstract Magnetic and photoactive carbon based materials with the use of polyoxometalate-based ionic crystal [Fe(phen)32[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 nanocomposites (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.

中文翻译：

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离子晶体装饰磁性氧化石墨烯/一氧化钴纳米复合材料的竞争性光催化活性：与其 MWCNTs 类似物的比较

摘要 利用多金属氧酸盐基离子晶体 [Fe(phen)32[SiW12O40·3DMF (IC-Fe) 在一氧化钴 (II) 修饰的磁性碳纳米材料 (MCNs/Fe3O4/CoO)] 上合成了磁性和光活性碳基材料和特点。制备的纳米复合材料通过 FT-IR、XRD、拉曼、TEM、VSM、XPS 和 UV-Vis 进行表征。我们已经证明合成的 MCNs/Fe3O4/CoO/IC-Fe 纳米复合材料（CNs=氧化石墨烯（GO）和多壁碳纳米管（MWCNTs））可用作稳定的光催化剂，用于光降解 2,4,6-三氯苯酚（ 2,4,6-TCP) 污染物，在可见光照射下。将合成的纳米复合材料的光催化活性与原始 IC-Fe 纳米颗粒之一进行比较。我们提出氧化石墨烯影响 GO/Fe3O4/CoO/IC-Fe 的光催化活性，并将其与其 MWCNTs 类似物进行比较。在这种纳米复合材料中引入 CNs 的主要影响是带隙的减小，从而导致吸光度在两种情况下都增强（对于 GO，效果更强）。结果表明，基于GO的光催化剂表现出比起始材料更好的光催化活性。此外，复合材料材料的磁性可用于光催化反应结束时纳米复合材料的收集和再利用。结果是吸光度在两种情况下都会增强（对于 GO，效果更强）。结果表明，基于GO的光催化剂表现出比起始材料更好的光催化活性。此外，复合材料材料的磁性可用于光催化反应结束时纳米复合材料的收集和再利用。结果是吸光度在两种情况下都会增强（对于 GO，效果更强）。结果表明，基于GO的光催化剂表现出比起始材料更好的光催化活性。此外，复合材料材料的磁性可用于光催化反应结束时纳米复合材料的收集和再利用。