Abstract：
The world is dealing with unprecedented environmental challenges, leading to a growing urgency to limit environmental damage. So, this study focuses on the synthesis of pure CuO, Zn, Ce, and Zn/Ce dual-doped CuO nanoparticles (NPs) using extract of Citrus limon leaves as reductant via simple co-precipitation method. The X-ray diffraction (XRD) characterization was employed to analyze structural characteristics of synthesized samples which confirm influence of Zn or Ce doping on crystallite size, dislocation density, and strain. The role of functional groups, changes in force constant, and bond length on addition of dopants was indicated by FTIR results. The SEM and TEM results showed variation in morphology from irregular to spherical. The zeta-potential and BET analysis confirmed surface potential as well as surface area characteristics. The change in energy gap values from 1.81 to 1.45 eV of Zn/Ce-doped CuO NPs computed from UV-vis analysis elevated its photocatalytic performance and reduced the chances of recombination of electron-hole pair due to presence of trapping levels between valence and conduction bands. The enhanced photo-degradation of Congo red (CR) and rhodamine B (RhB) with 91 and 94%, respectively, for Zn/Ce-doped CuO NPs was observed. The so-obtained samples have also exhibited good antibacterial and antioxidant activities.
摘要：
世界正在应对前所未有的环境挑战，导致限制环境破坏的紧迫性日益增加。所以,这项研究的重点是纯CuO的合成，Zn,Ce,以柑橘柠檬叶提取物为还原剂，通过简单共沉淀法制备Zn/Ce双掺杂CuO纳米颗粒（NPs）。X射线衍射（XRD）表征被用来分析合成样品的结构特征，证实了Zn或Ce掺杂对微晶尺寸的影响，位错密度,和应变。功能组的作用，力常数的变化，FTIR结果表明了添加掺杂剂时的键长。SEM和TEM结果显示从不规则到球形的形态变化。ζ电位和BET分析证实了表面电势以及表面积特征。从UV-vis分析计算出的Zn/Ce掺杂的CuONP的能隙值从1.81到1.45eV的变化提高了其光催化性能，并减少了由于价带和导带之间存在俘获能级而导致的电子-空穴对复合的机会。刚果红（CR）和罗丹明B（RhB）的光降解增强，分别为91％和94％，分别,对于Zn/Ce掺杂的CuONPs进行了观察。如此获得的样品也表现出良好的抗菌和抗氧化活性。
