Cu_1–xNi_xO/Fe₂O₃ (with x = 0.01, 0.02, 0.03, 0.04 wt%) were synthesized by plant extraction technique. The absorbance and degradation performance of Ni-doped CuO and Fe₂O₃ nanocomposite against methylene blue (MB) was analyzed, and the 2% Ni-doped CuO yielded an optimum result, and the optical bandgap of CuO, 2NCO, Fe₂O₃, and (60%) 2NCO/40% Fe₂O₃ was found to be 1.88, 1.73, 2.1, and 1.80 eV, respectively. Hence, the 2% Ni-doped CuO (2NCO) was further used for the establishment of a composite with Fe₂O₃. The lowest composition of the oxide composite was (1−x) 2NCO/(x) Fe₂O₃ (x = 0.1, 0.2, 0.3, 0.4, and 0.5). The degradation performance of those oxide composites was determined against (MB) with the nominal composition of sample (60%) 2NCO/40% Fe₂O₃ resulted in an optimum degradation of MB with a percentage of 94% at 120 min. The recyclability takes a look at was performed for five cycles at the start of 94%; after five cycles, the sample remained stable at 120 min. Therefore, 2NCO/40% Fe₂O₃ composite is going to be the selection material for waste product treatment.

中文翻译：

---

植物介导合成 Ni 掺杂 CuO 和 Fe2O3 纳米复合材料用于亚甲蓝染料的光降解

Cu _{1– x} Ni _x O/Fe ₂ O ₃ ( x  = 0.01, 0.02, 0.03, 0.04 wt%) 采用植物提取技术合成。分析了Ni掺杂CuO和Fe 2 O 3 纳米复合材料对亚甲基蓝（MB）的吸光度和降解性能_， 2 _{% Ni掺杂CuO获得最佳结果，CuO、2NCO、Fe 2} O的光学带隙₃和 (60%) 2NCO/40% Fe ₂ O ₃被发现分别为 1.88、1.73、2.1 和 1.80 eV。因此，2% Ni 掺杂的 CuO (2NCO) 进一步用于建立与 Fe ₂ O _{3的复合物}. 氧化物复合物的最低组成为 (1− x ) 2NCO/( x ) Fe ₂ O ₃（x  = 0.1、0.2、0.3、0.4 和 0.5）。这些氧化物复合材料的降解性能是根据 (MB) 确定的，样品的标称组成 (60%) 2NCO/40% Fe ₂ O ₃导致 MB 在 120 分钟时的最佳降解百分比为 94%。可回收性测试在94%的开始进行了五个循环；五次循环后，样品在 120 分钟时保持稳定。因此，2NCO/40%Fe ₂ O ₃复合材料将成为废品处理的优选材料。