A versatile graphene oxide nanosheets-ZnO nanospheres nanocomposite was synthesized for removal of dyes via adsorption process and characterized by various techniques, such as X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and zeta potential (ZP) analyzer. The synthesized nanocomposite (NCs) was utilized as an efficient adsorbent for the removal of anionic dye eosin y (EY) as well as cationic dye methylene blue (MB) from aqueous solutions. The kinetics of adsorption was studied by pseudo-first and pseudo-second-order kinetics and the adsorption data was well in agreement with the pseudo-second-order model. The R² values of 0.9971 and 0.9839 of the second order for EY and MB, respectively, were greater than that of the first order. To calculate the most suitable isotherm model for adsorption, the Freundlich and Langmuir isotherms were applied and the data for both dyes fitted well with the Langmuir model. The maximum adsorption capacities obtained from Langmuir isotherm for EY and MB were 555.55 and 250 mg/g, respectively. Remarkably, 3.0 mg/13 mL of nanocomposite adsorbed 0.1 mg/mL of EY and 0.04 mg/mL of MB in the very short time of 10 and 15 minutes, respectively. The high adsorption efficiency of GO/ZnO NCs suggests that they may be a useful adsorbent for the purification of industrial wastewater.

合成了一种通用的氧化石墨烯纳米片-ZnO 纳米球纳米复合材料，用于通过吸附过程去除染料，并通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、傅里叶变换红外 (FTIR) 和 zeta 等各种技术对其进行表征电位 (ZP) 分析仪。合成的纳米复合材料 (NCs) 被用作从水溶液中去除阴离子染料伊红 y (EY) 和阳离子染料亚甲蓝 (MB) 的有效吸附剂。采用拟一级和拟二级动力学研究吸附动力学，吸附数据与拟二级模型吻合较好。R ²EY 和 MB 的二阶值 0.9971 和 0.9839 分别大于一阶的值。为了计算最适合吸附的等温线模型，应用了 Freundlich 和 Langmuir 等温线，两种染料的数据都与 Langmuir 模型非常吻合。从朗缪尔等温线获得的 EY 和 MB 的最大吸附容量分别为 555.55 和 250 mg/g。值得注意的是，3.0 mg/13 mL 的纳米复合材料分别在 10 分钟和 15 分钟的非常短的时间内吸附了 0.1 mg/mL 的 EY 和 0.04 mg/mL 的 MB。GO / ZnO NCs的高吸附效率表明它们可能是用于净化工业废水的有用吸附剂。