ZnGa₂O₄ nanocomposites have been widely used for photocatalytic degradation of industrial dyes. In this work, ZnGa₂O₄ was synthesized from zinc sulphate heptahydrate ZnSO₄^.10H₂O and Gallium (III) oxide (Ga₂O₃) by hydrothermal method. As prepared, ZnGa₂O₄ nanocomposites was used as a photocatalyst degradation of three organic dyes rhodamine-B, methylene blue, and methyl orange, under ultraviolet (UV) light irradiation. The ZnGa₂O₄ nanocomposites structure, morphology, size and optical properties were studied by X-ray diffraction (XRD), Fourier transform Raman spectroscopy (FT-Raman), scanning electron microscopy (SEM), Transmission electron microscopes (TEM) and photoluminescence spectra (PL). Moreover, the results explained the rate-controlling mechanisms of the dye degradation process followed by second-order kinetics. After 100 min of adsorption kinetic models, the decomposition of rhodamine-B (7.2 Ct mg/L, 5.2 Ct mg/L, and 4.1 Ct mg/L), methylene blue (42.8 qt mg/g, 44.8 qt mg/g, and 45.9 qt mg/g), and methyl orange (42.8 qe mg/g, 44.8 qe mg/g, and 45.9 qe mg/g) respectively. This investigation study offers a promising method to design more efficient ZnGa₂O₄ nanocomposites based photocatalytic degradation of industrial organic dyes.

ZnGa ₂ O ₄纳米复合材料已广泛用于工业染料的光催化降解。本工作以七水硫酸锌 ZnSO 4 为原料合成了_{ZnGa 2} O ₄ ^。水热法制备10H ₂ O 和氧化镓 (III) (Ga ₂ O ₃ )。正如所制备的那样，ZnGa ₂ O ₄纳米复合材料被用作三种有机染料罗丹明-B、亚甲基蓝和甲基橙在紫外（UV）光照射下的光催化剂降解。ZnGa ₂ O ₄通过X射线衍射(XRD)、傅里叶变换拉曼光谱(FT-Raman)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和光致发光光谱(PL)研究了纳米复合材料的结构、形貌、尺寸和光学性质。此外，结果解释了染料降解过程的速率控制机制以及二级动力学。在吸附动力学模型 100 分钟后，罗丹明-B（7.2 Ct mg/L、5.2 Ct mg/L 和 4.1 Ct mg/L）、亚甲蓝（42.8 qt mg/g、44.8 qt mg/g）的分解，和 45.9 qt mg/g）和甲基橙（42.8 qe mg/g、44.8 qe mg/g 和 45.9 qe mg/g）。这项调查研究提供了一种有前途的方法来设计更高效的 ZnGa ₂ O ₄基于纳米复合材料的工业有机染料光催化降解。