We report the structural and catalytic behavior for nanocomposites such as Fe₃C/C, Fe₃C/Fe₃O₄/C and Ni-substituted Fe₃C/Fe₃O₄/C, which were synthesized by sol-gel route followed by calcination at 700 °C in N₂ atmosphere. The structural and coexistence of the phases present in the nanocomposite were analyzed by X-ray and electron diffractions. The Mössbauer spectroscopy also supported above findings. The X-ray photoelectron spectroscopy designated oxidation states and bonding between the elements present in the composites. Magnetic properties measurements system was carried out to examine the effect of Ni substitution on the magnetic behaviors of the nanocomposites. The optical band gaps of the prepared nanomaterials were suitable for photocatalytic activity. Thus, the catalytic activities of these nanocomposites were evaluated during the degradation of methyl orange and p-nitrophenol under Fenton-like and photo-Fenton conditions. The optimum apparent catalytic reaction rate constant for Fe₃C/Fe₃O₄/C with p-nitrophenol and methyl orange were ~1.48 x 10⁻² and 3.36 x 10⁻² mol⁻¹ L⁻¹ min⁻¹, respectively. The catalysts were stable even after 5th cycles of catalytic experiments, and it was confirmed from their XRD patterns.

我们报道了通过溶胶-凝胶法合成的Fe ₃ C / C，Fe ₃ C / Fe ₃ O ₄ / C和Ni取代的Fe ₃ C / Fe ₃ O ₄ / C等纳米复合材料的结构和催化行为。随后在700°C的N _2中煅烧气氛。通过X射线和电子衍射分析了纳米复合物中存在的相的结构和共存。穆斯堡尔光谱法也支持上述发现。X射线光电子能谱指定了氧化态和复合物中存在的元素之间的键合。进行了磁性能测量系统，以检查镍取代对纳米复合材料磁行为的影响。制备的纳米材料的光学带隙适于光催化活性。因此，在类芬顿和光芬顿条件下，在甲基橙和对硝基苯酚的降解过程中评估了这些纳米复合材料的催化活性。Fe ₃ C / Fe ₃的最佳表观催化反应速率常数具有对硝基苯酚和甲基橙的O ₄ / C分别为〜1.48×10 ^-2和3.36×10 ^-2  mol ^-1  L ^-1 min ^-1。该催化剂甚至在第5次催化实验循环后仍是稳定的，并从其XRD图谱得到了证实。