The increasing worldwide pollution of water resources with dyes has emphasized the need to develop highly versatile and effective approaches for their remediation. In this study, zirconium substituted manganese cobalt ferrite (Mn_0.2Co_0.8Zr_xFe_2−xO₄) nanoparticles, and their composites with reduced graphene oxide (Mn_0.2Co_0.8Zr_xFe_2−xO₄/rGO) were synthesized and used as effective photocatalyst materials for the degradation of dyes. X-ray diffraction analysis was executed to probe the cubic spinel structures of nanoparticles in the size range of 18–24 nm. Scanning Electron Microscopy revealed the formation of spherical shaped nanoparticles and their dispersion on the exfoliated surface of rGO. The saturation magnetization and remanence of samples decreased from 57.23 to 24.16 emu/g and 27.68–13.98 emu/g respectively while the coercivity of samples increased from 1067.76 Oe to 1616.97 Oe due to the incorporation of non-magnetic Zr⁴⁺ into the lattice. The BET surface area of nanoparticles and nanocomposites lies in the range of 47.52–78.33 m²/g, while the average pore size was found to be 2.48–21.43 nm. The degradation performance of as-prepared nanoparticles and nanocomposites was evaluated against Alizarin Yellow R (AYR) dye under visible light irradiation. Mn_0.2Co_0.8Zr_xFe_2−xO₄/rGO nanocomposites showed higher degradation performance and 92.49% dye degradation was achieved in 70 min, while in the case of Mn_0.2Co_0.8Zr_xFe_2−xO₄ nanoparticles 52.45% dye was degraded in 120 min. The effects of different operational parameters on the degradation performance of nanocomposites were investigated thoroughly. The higher photodegradation of nanocomposites was attributed to the large surface area and less magnetization, making them potential candidates for their applications in water purification.

染料对全球水资源的污染日益严重，这强调了开发高度通用和有效的补救方法的必要性。在这项研究中，锆取代锰钴铁氧体（Mn _0.2 Co _0.8 Zr _x Fe _2-x O ₄）纳米粒子及其复合材料与还原氧化石墨烯（Mn _0.2 Co _0.8 Zr _x Fe _2-x O _4）（rGO）合成并用作降解染料的有效光催化剂材料。进行了X射线衍射分析，以探测18-24 nm范围内的纳米颗粒的立方尖晶石结构。扫描电子显微镜显示球形纳米颗粒的形成及其在rGO脱落表面上的分散。样品的饱和磁化强度和剩磁分别从57.23 emu / g和27.68-13.98 emu / g降低，而由于非磁性Zr ⁴⁺掺入晶格，样品的矫顽力从1067.76 Oe增至1616.97 Oe 。纳米粒子和纳米复合材料的BET表面积在47.52–78.33 m ²的范围内/ g，而平均孔径为2.48–21.43 nm。在可见光照射下评估了制备的纳米颗粒和纳米复合材料对茜素黄R（AYR）染料的降解性能。Mn _0.2 Co _0.8 Zr _x Fe _2-x O ₄ / rGO纳米复合材料表现出更高的降解性能，在70分钟内达到92.49％的染料降解，而Mn _0.2 Co _0.8 Zr _x Fe _2-x O ₄纳米粒子52.45％的染料在120分钟内降解。深入研究了不同操作参数对纳米复合材料降解性能的影响。纳米复合材料较高的光降解性归因于其较大的表面积和较少的磁化强度，使其成为水净化应用的潜在候选者。