In the present work, ceria/zinc oxide (CeO₂/ZnO) nanocomposite has been synthesized by controlled annealing of cerium and zinc precursors. The obtained CeO₂/ZnO nanocomposite was characterized using common analytical methods such as Fourier transform infrared spectroscopy (FT-IR), UV-Visible diffuse reflectance spectroscopy (UV-DRS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy with energy dispersive spectrum (SEM with EDS) and elemental mapping measurements. The band gap energy of CeO₂/ZnO nanocomposite was about ∼2.9 eV calculated from the Tauc plot. The XRD pattern of CeO₂/ZnO nanocomposite consisted mixed phases of CeO₂ and ZnO with crystalline nature. The XPS spectrum of CeO₂/ZnO revealed the presence of C, Zn, N, O and Ce elements, where Zn and Ce existed in 2⁺ and 4⁺ oxidation states, respectively. The particle size and shape of synthesized CeO₂/ZnO nanocomposite was approximately 0.32 µm with a distorted spherical shape identified from the SEM images. The synthesized CeO₂/ZnO nanocomposite effectively degraded BG in water and the calculated kinetic rate constant was 0.0471 min⁻¹. The results suggested that CeO₂/ZnO nanocomposite behave as a good photocatalyst towards the degradation of BG, identified from the quick degradation as compared with pure ZnO and CeO₂. The enhanced catalytic performance of CeO₂/ZnO nanocomposite was attributed to the synergistic effect of both CeO₂ and ZnO semiconductors, which decrease the bandgap energy and increase the degradation kinetics.

在目前的工作中，通过铈和锌前体的受控退火合成了氧化铈/氧化锌（CeO ₂ /ZnO）纳米复合材料。使用傅里叶变换红外光谱（FT-IR）、紫外-可见漫反射光谱（UV-DRS）、X射线衍射（XRD）、X射线光电子能谱等常用分析方法对所得CeO ₂ /ZnO纳米复合材料进行表征(XPS) 和具有能量色散谱（带有 EDS 的 SEM）和元素映射测量的扫描电子显微镜。根据Tauc 图计算，CeO ₂ /ZnO 纳米复合材料的带隙能量约为 2.9 eV。的CeO的XRD图₂ /纳米ZnO复合材料组成的CeO混合相₂和具有结晶性质的 ZnO。CeO ₂ /ZnO的 XPS 光谱显示存在 C、Zn、N、O 和 Ce 元素，其中 Zn 和 Ce 分别以 2 ⁺和 4 ⁺氧化态存在。合成的 CeO ₂ /ZnO 纳米复合材料的粒径和形状约为 0.32 µm，从 SEM 图像中可以看出具有扭曲的球形。合成的CeO ₂ /ZnO纳米复合材料在水中有效降解BG，计算的动力学速率常数为0.0471 min ^-1。结果表明，与纯 ZnO 和 CeO 相比，CeO ₂ /ZnO 纳米复合材料对 BG 的降解是一种良好的光催化剂，从快速降解中可以看出₂ . CeO ₂ /ZnO纳米复合材料的催化性能增强归因于CeO ₂和ZnO半导体的协同效应，它们降低了带隙能并增加了降解动力学。