Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia.
Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, 11757, Egypt.
Environ Sci Pollut Res Int. 2022 Mar;29(13):19109-19131. doi: 10.1007/s11356-021-16754-6. Epub 2021 Oct 28.
In this proposed study, erbium (Er)-doped ZnO nanocomposites were prepared through the effective, basic, and green combustion method. The significant effects of Er dopants on the structural, morphological features, dielectric, and optical behaviors of the pure ZnO matrix as well as ErO-ZnO nanostructured materials were investigated applying X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transformation infrared (FT-IR) spectroscopy, and UV-Vis spectrophotometer techniques. These results showed that the synthesized ErO-ZnO nanocomposites are well polycrystalline. The ErO-ZnO nanocomposites are almost uniformly distributed on the surface morphologies. Furthermore, UV-Vis diffuse reflectance spectroscopy, AC electrical conductivity, and dielectric properties' current-voltage characteristics were utilized to examine the influence of erbium doping on the optical properties, energy bandgaps of the proposed ErO-ZnO nanostructured powder. The tested nano-samples were applied for the visible light photodegradation of p-chlorophenol(4-CP) and p-nitrophenol (4-NP). The Er-doped ZnO ratio affects the photocatalytic activity of the ZnO matrix. This current research substantiated that more than 99.5% of 4-CP and 4-NP were photodegraded through 30 min of irradiation. Four times, the Er:ZnO nanocatalysts were used and still displayed an efficiency of more than 96.5% for 4-CP and 4-NP degradations in the specified period of 30 min. The as-prepared ErO-ZnO nanostructures are considered novel potential candidates in broad nano-applications from visible photocatalytic degradation of waste pollutants to the electronic varistor devices.
在这项拟议的研究中，通过有效、基础和绿色的燃烧法制备了掺铒（Er）的 ZnO 纳米复合材料。利用 X 射线衍射（XRD）、扫描电子显微镜（SEM）、傅里叶变换红外（FT-IR）光谱和紫外-可见分光光度计技术研究了 Er 掺杂剂对纯 ZnO 基体以及 ErO-ZnO 纳米结构材料的结构、形态特征、介电和光学性能的显著影响。这些结果表明，合成的 ErO-ZnO 纳米复合材料是很好的多晶。ErO-ZnO 纳米复合材料几乎均匀分布在表面形貌上。此外，利用紫外-可见漫反射光谱、交流电导率和电流-电压特性研究了 Er 掺杂对所提出的 ErO-ZnO 纳米结构粉末光学性能和能带隙的影响。测试的纳米样品用于可见光光降解对氯苯酚（4-CP）和对硝基苯酚（4-NP）。掺铒 ZnO 的比例影响 ZnO 基体的光催化活性。本研究证实，在 30 分钟的照射下，超过 99.5%的 4-CP 和 4-NP 被光降解。使用 Er:ZnO 纳米催化剂四次，在指定的 30 分钟内，对 4-CP 和 4-NP 的降解仍显示出超过 96.5%的效率。所制备的 ErO-ZnO 纳米结构被认为是从废污染物的可见光光催化降解到电子变阻器器件等广泛纳米应用的新型潜在候选材料。
