Fabrication of porous nanocomposites was synthesized by incorporating CuS–ZnS nanospheres and graphene layers via a simple method for efficient photocatalytic performance. The transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HRTEM) images showed that the as-prepared copper sulphide (CuS) and zinc sulphide (ZnS) nanomaterials are spherical in shape and uniformly dispersed in graphene layers. The strong bonding interaction between as-synthesized nanospheres and graphene layers were analysed by using XRD and XPS analysis. The Raman spectra analysis indicates the shifting of charge carriers between the nanospheres and graphene layers. The insertion of CuS–ZnS nanospheres significantly enhances the surface area, porosity, adsorbability and interplanar distances of the graphene layers due to the better synergistic effect. The formation of a p-n junction on the graphene surfaces was confirmed by Nyquist plot analysis. The photocatalytic degradation of methyl orange (MO) - rhodamine B (RhB) dyes mixture in aqueous solution of as-synthesized nanocomposites was compared with pristine graphene. The nanocomposites show better photocatalytic performance over a wide pH range of 4.45–10.38. The mechanism of photocatalytic degradation was also discussed. The stability and reusability of as-synthesized nanocomposites were also estimated. The obtained results showed the excellent dyes degradation efficiency of as-synthesized nanocomposites due to its excellent surface area, porosity, better UV light harvesting capacity and ultra-fast electron-hole transfer capacity. Hence, CuS–ZnS decorated Graphene is a potential photocatalyst for MO – RhB dyes mixture degradation in industrial applications.

通过将CuS–ZnS纳米球和石墨烯层通过一种有效的光催化性能的简单方法结合起来，合成了多孔纳米复合材料。透射电子显微镜（TEM）和高分辨率透射电子显微镜（HRTEM）图像显示，所制备的硫化铜（CuS）和硫化锌（ZnS）纳米材料的形状为球形，并且均匀地分散在石墨烯层中。通过XRD和XPS分析，分析了合成纳米球与石墨烯层之间的强键相互作用。拉曼光谱分析表明，载流子在纳米球和石墨烯层之间移动。CuS–ZnS纳米球的插入显着提高了表面积，孔隙率，由于更好的协同效应，石墨烯层的吸附能力和晶面间距。奈奎斯特图分析证实了石墨烯表面上pn结的形成。将甲基橙（MO）-罗丹明B（RhB）染料混合物在合成的纳米复合材料水溶液中的光催化降解与原始石墨烯进行了比较。纳米复合材料在4.45–10.38的宽pH范围内显示出更好的光催化性能。还讨论了光催化降解的机理。还评估了合成纳米复合材料的稳定性和可重复使用性。所得结果表明，由于其具有优异的表面积，孔隙率，更好的紫外光收集能力和超快速的电子-空穴传输能力，因此，其合成后的纳米复合材料具有优异的染料降解效率。因此，