Abstract：
This study presents the green synthesis and multifunctional properties of Cu/NiO nanocomposites (NCs) fabricated with varying ratios (90:10, 80:20, and 70:30) using Commelina benghalensis leaf extract. X-ray diffraction (XRD) analysis confirmed the polycrystalline nature of the NCs, revealing crystallite sizes of 13.62, 13.22, and 7.14 nm. Scanning electron microscopy (SEM) showed rod-shaped and agglomerated particles with sizes ranging from 17.64 to 22.97 nm. Energy-dispersive X-ray spectroscopy (EDX) verified the elemental composition of copper, nickel, oxygen, and carbon. UV-visible spectroscopy determined the energy band gaps to be in the range of 1.24-1.56 eV. Fourier-transform infrared spectroscopy (FT-IR) indicated the presence of bioactive compounds responsible for the reduction of precursor metal salts. The Cu/NiO NCs exhibited remarkable antimicrobial activity, with the 90:10 ratio showing the highest zones of inhibition at 32.76 ± 0.23 mm, 18.66 ± 0.33 mm, and 14.36 ± 0.32 mm against Bacillus subtilis, Staphylococcus aureus, and Escherichia coli, respectively. Additionally, the 70:30 Cu/NiO NCs demonstrated superior antioxidant activity, with a radical scavenging efficiency of 83.22%, closely approaching that of ascorbic acid (96.98%). Photocatalytic evaluations revealed that the NCs were highly effective in degrading environmental pollutants, achieving 97.69% degradation of malachite green and 96.52% of congo red under UV light irradiation. The novelty of this work lies in the use of Commelina benghalensis leaf extract as a sustainable and eco-friendly reducing and stabilizing agent for synthesizing Cu/NiO NCs, offering a green alternative to conventional methods. The synergistic effects between Cu and NiO in the different compositions (90:10, 80:20, and 70:30) enhanced the overall antimicrobial and photocatalytic activities, highlighting their potential for environmental remediation applications.
摘要：
这项研究介绍了使用Commelinabenghalensis叶提取物以不同比例（90：10、80：20和70：30）制备的Cu/NiO纳米复合材料（NC）的绿色合成和多功能性能。X射线衍射(XRD)分析证实了NC的多晶性质，显示13.62，13.22和7.14nm的微晶尺寸。扫描电子显微镜（SEM）显示棒状和团聚的颗粒，尺寸范围为17.64至22.97nm。能量色散X射线光谱（EDX）验证了铜的元素组成，镍,氧气,和碳。UV-可见光谱法确定能带隙在1.24-1.56eV的范围内。傅里叶变换红外光谱（FT-IR）表明存在负责还原前体金属盐的生物活性化合物。Cu/NiONCs表现出显著的抗菌活性，90:10的比率在32.76±0.23mm处显示出最高的抑制区，18.66±0.33mm,和14.36±0.32毫米对枯草芽孢杆菌，金黄色葡萄球菌,和大肠杆菌，分别。此外,70:30的Cu/NiONCs表现出优异的抗氧化活性，自由基清除效率为83.22%,接近抗坏血酸(96.98%)。光催化评估表明，NCs在降解环境污染物方面非常有效，在紫外光照射下，孔雀石绿降解率达到97.69%，刚果红降解率达到96.52%。这项工作的新颖性在于使用Commelinabenghalensis叶提取物作为可持续和生态友好的还原和稳定剂来合成Cu/NiONCs，为传统方法提供绿色替代方案。Cu和NiO在不同组成（90:10，80:20和70:30）中的协同作用增强了整体抗微生物和光催化活性，强调他们在环境修复应用方面的潜力。
