Scientific Research Centre, Soran University, Soran, Kurdistan-Region, Iraq.
Civil Engineering Department, Faculty of Engineering, Soran University, Soran, Kurdistan-Region, Iraq.
PLoS One. 2022 Aug 5;17(8):e0268184. doi: 10.1371/journal.pone.0268184. eCollection 2022.
The usage of the green synthesis method to produce nanoparticles (NPs) has received great acceptance among the scientific community in recent years. This, perhaps, is owing to its eco-friendliness and the utilization of non-toxic materials during the synthesizing process. The green synthesis approach also supplies a reducing and a capping agent, which increases the stability of the NPs through the available phytochemicals in the plant extractions. The present study describes a green synthesis method to produce nano-silica (SiO2) NPs utilizing Rhus coriaria L. extract and sodium metasilicate (Na2SiO3.5H2O) under reflux conditions. Sodium hydroxide (NaOH) is added to the mixture to control the pH of the solution. Then, the obtained NPs have been compared with the chemically synthesized SiO2 NPs. The structure, thermal, and morphological properties of the SiO2 NPs, both green synthesized and chemically synthesized, were characterized using Fourier-transform infrared spectroscopy (FTIR), Ultraviolet-Visible Spectroscopy (UV-Vis), X-ray diffraction (XRD), and Field Emission Scanning Electron Microscopy (FESEM). Also, the elemental compassion distribution was studied by energy-dispersive X-ray spectroscopy (EDX). In addition, the zeta potential, dynamic light scatter (DLS), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) was used to study the stability, thermal properties, and surface area of the SiO2 NPs. The overall results revealed that the green synthesis of SiO2 NPs outperforms chemically synthesized SiO2 NPs. This is expected since the green synthesis method provides higher stability, enhanced thermal properties, and a high surface area through the available phytochemicals in the Rhus coriaria L. extract.
近年来，使用绿色合成方法来制备纳米粒子（NPs）在科学界得到了广泛的认可。这或许是由于其环保性以及在合成过程中使用无毒材料。绿色合成方法还提供了还原剂和封端剂，通过植物提取物中的可用植物化学物质增加 NPs 的稳定性。本研究描述了一种使用 R. coriaria L. 提取物和偏硅酸钠（Na2SiO3.5H2O）在回流条件下制备纳米二氧化硅（SiO2）NPs 的绿色合成方法。向混合物中加入氢氧化钠（NaOH）以控制溶液的 pH 值。然后，将获得的 NPs 与化学合成的 SiO2 NPs 进行比较。使用傅里叶变换红外光谱（FTIR）、紫外-可见光谱（UV-Vis）、X 射线衍射（XRD）和场发射扫描电子显微镜（FESEM）对绿色合成和化学合成的 SiO2 NPs 的结构、热和形态特性进行了表征。还通过能谱（EDX）研究了元素压缩分布。此外，还使用zeta 电位、动态光散射（DLS）、热重分析（TGA）和差示扫描量热法（DSC）研究了 SiO2 NPs 的稳定性、热性能和表面积。总体结果表明，SiO2 NPs 的绿色合成优于化学合成的 SiO2 NPs。这是预期的，因为绿色合成方法通过 R. coriaria L. 提取物中的可用植物化学物质提供了更高的稳定性、增强的热性能和更高的表面积。
