Mohamed Elwy A
Agricultural Research Center, P.O. Box 12619, Giza, Egypt.
Heliyon. 2020 Jan 30;6(1):e03123. doi: 10.1016/j.heliyon.2019.e03123. eCollection 2020 Jan.
In the last few years, copper and copper oxide nanoparticles were involved in many applications; this encouraged many researchers worldwide to develop more facile synthesis methods. Unprecedentedly, the current study reports a green method for synthesizing (Cu/CuO NPs) using the extract of seedless dates. Cu/CuO NPs were synthesized according to the chemical reduction method using seedless dates' extract as a reducing agent due to its high content of phenolics and flavonoids. Transmission Electron Microscopy (TEM) revealed that roughly spherical particles were synthesized. Dynamic Light Scattering (DLS) showed that the synthesized Cu/CuO NPs have an average particle size of 78 nm and zeta potential of +41 mV, indicating a good stability of the particles. Successful synthesis of Cu/CuO NPs was affirmed through both X-Ray Diffraction (XRD), which revealed the presence of the characteristic peaks of copper at 2θ = 43.2745, 50.4083 and 74.1706°, and UV-Vis. Spectroscopy, which revealed the surface plasmonic resonance peak characterizes Cu/CuO NPs at 576 nm. In addition, Fourier Transform Infrared Spectroscopy (FTIR) revealed the presence of phenolic compounds, which were responsible for reducing copper ions into copper nanoparticles through their carbonyl and hydroxyl linkages, adsorbed from the extract on Cu/CuO NPs. Conclusively, the current work provides, for the first time, a simple, cost-effective and environmentally friendly method for synthesizing Cu/CuO NPs using useless seedless dates.
在过去几年中，铜和氧化铜纳米颗粒参与了许多应用；这促使全球许多研究人员开发更简便的合成方法。当前的研究首次报道了一种使用无核枣提取物合成（铜/氧化铜纳米颗粒）的绿色方法。由于无核枣提取物中酚类和黄酮类化合物含量高，因此根据化学还原法，以无核枣提取物作为还原剂合成了铜/氧化铜纳米颗粒。透射电子显微镜（TEM）显示合成出了大致呈球形的颗粒。动态光散射（DLS）表明，合成的铜/氧化铜纳米颗粒平均粒径为78 nm，zeta电位为 +41 mV，表明颗粒具有良好的稳定性。通过X射线衍射（XRD）（其显示在2θ = 43.2745、50.4083和74.1706°处存在铜的特征峰）以及紫外可见光谱（其显示表面等离子体共振峰在576 nm处表征铜/氧化铜纳米颗粒），证实了铜/氧化铜纳米颗粒的成功合成。此外，傅里叶变换红外光谱（FTIR）显示存在酚类化合物，这些酚类化合物通过其羰基和羟基键将铜离子还原为铜纳米颗粒，它们从提取物中吸附在铜/氧化铜纳米颗粒上。总之，当前的工作首次提供了一种使用无用的无核枣合成铜/氧化铜纳米颗粒的简单、经济高效且环境友好的方法。
